EntityFramework.SqlServer
    
    
        
            
            Adapter interface to make working with instances of  or  easier.
            Implementing types wrap instances of DbGeography/DbGeometry and allow them to be consumed in a common way.
            This interface is implemented by wrapping types for two reasons:
            1. The DbGeography/DbGeometry classes cannot directly implement internal interfaces because their members are virtual (behavior is not guaranteed).
            2. The wrapping types ensure that instances of IDbSpatialValue handle the s thrown
            by any unimplemented members of derived DbGeography/DbGeometry types that correspond to the properties and methods declared in the interface.
            
        
        
            
            An  that doesn't affect the execution but will throw a more helpful exception if a transient failure is detected.
            
        
        
            
            Returns an instance of  that wraps the specified  value.
            IDbSpatialValue members are guaranteed not to throw the s caused by unimplemented members of their wrapped values.
            
             The geography instance to wrap 
            
            An instance of  that wraps the specified geography value
            
        
        
            
            Returns an instance of  that wraps the specified  value.
            IDbSpatialValue members are guaranteed not to throw the s caused by unimplemented members of their wrapped values.
            
             The geometry instance to wrap 
            
            An instance of  that wraps the specified geometry value
            
        
        
            
            Strongly-typed and parameterized string resources.
            
        
        
            
            A string like "The argument '{0}' cannot be null, empty or contain only white space."
            
        
        
            
            A string like "The provider returned null for the informationType '{0}'."
            
        
        
            
            A string like "The underlying provider does not support the type '{0}'."
            
        
        
            
            A string like "There is no store type corresponding to the conceptual side type '{0}' of primitive type '{1}'."
            
        
        
            
            A string like "The provider manifest given is not of type '{0}'."
            
        
        
            
            A string like "Internal .NET Framework Data Provider error {0}."
            
        
        
            
            A string like "Spatial readers can only be produced from readers of type SqlDataReader. A reader of type {0} was provided."
            
        
        
            
            A string like "Expected a geography value, found a value of type {0}."
            
        
        
            
            A string like "Expected a geometry value, found a value of type {0}."
            
        
        
            
            A string like "The connection is not of type '{0}'."
            
        
        
            
            A string like "Store-generated keys are only supported for identity columns. More than one key column is marked as server generated in table '{0}'."
            
        
        
            
            A string like "Store-generated keys are only supported for identity columns. Key column '{0}' has type '{1}', which is not a valid type for an identity column."
            
        
        
        
            
            A string like "The expression '{0}' is of an unsupported type. "
            
        
        
            
            A string like "The DATEPART argument to the '{0}.{1}' function must be a literal string."
            
        
        
            
            A string like "'{0}' is not a valid value for the DATEPART argument in the '{1}.{2}' function."
            
        
        
            
            A string like "Constant expressions of type {0} with a value of NaN are not supported by SQL Server."
            
        
        
            
            A string like "Constant expressions of type {0} with a value of {1}.PositiveInfinity are not supported by SQL Server."
            
        
        
            
            A string like "Constant expressions of type {0} with a value of {1}.NegativeInfinity are not supported by SQL Server."
            
        
        
            
            A string like "There is no store type that maps to the EDM type '{0}' on versions of SQL Server earlier than SQL Server 2008."
            
        
        
            
            A string like "The EDM function '{0}' is not supported on versions of SQL Server earlier than SQL Server 2008."
            
        
        
            
            A string like "The specified provider value is not compatible with this spatial services implementation. A value is required of type '{0}'."
            
        
        
        
            
            A string like "The current migration SQL generator ({0}) is unable to generate SQL for operations of type '{1}'. Call SetSqlGenerator on your migrations configuration class to use a different SQL generator. To create a custom SQL generator that can handle this type of operation, add a new class that derives from {0} and override Generate(MigrationOperation)."
            
        
        
            
            A string like "The specified DbGeography value could not be converted to a SQL Server compatible value."
            
        
        
            
            A string like "The specified DbGeometry value could not be converted to a SQL Server compatible value."
            
        
        
            
            A string like "Could not determine storage version; a valid storage connection or a version hint is required."
            
        
        
            
            A string like "Spatial types and functions are only supported by SQL Server 2008 or later."
            
        
        
            
            A string like "Spatial types and functions are not available for this provider because the assembly 'Microsoft.SqlServer.Types' version 10 or higher could not be found. "
            
        
        
            
            A string like "The database creation succeeded, but the creation of the database objects failed. The consequent attempt to drop the database also failed. See InnerException for details."
            
        
        
            
            A string like "See InnerExceptions for details."
            
        
        
            
            A string like "Unable to complete operation. The supplied SqlConnection does not specify an initial catalog or AttachDBFileName."
            
        
        
            
            A string like "Unable to delete the database. There is no database that corresponds to the given AttachDBFileName."
            
        
        
            
            A string like "A connection to the specified database could not be opened. See InnerException for details. However, there is a database registered with the server that corresponds to the given AttachDbFileName."
            
        
        
            
            A string like "This operation requires a connection to the 'master' database. Unable to create a connection to the 'master' database because the original database connection has been opened and credentials have been removed from the connection string. Supply an unopened connection."
            
        
        
            
            A string like "The execution of this query requires the APPLY operator, which is not supported in versions of SQL Server earlier than SQL Server 2005."
            
        
        
            
            A string like "Functions listed in the provider manifest that are attributed as NiladicFunction='true' cannot have parameter declarations."
            
        
        
            
            A string like "Parameters as arguments to a TOP sub-clause and a LIMIT sub-clause in a query, or a LimitExpression in a command tree, are not supported in versions of SQL Server earlier than SQL Server 2005."
            
        
        
            
            A string like "Parameters as arguments to a SKIP sub-clause in a query, or a SkipExpression in a command tree, are not supported in versions of SQL Server earlier than SQL Server 2005."
            
        
        
            
            A string like "The specified DbWellKnownGeographyValue does not contain either Well-Known Text or Well-Known Binary."
            
        
        
            
            A string like "The specified DbWellKnownGeometryValue does not contain either Well-Known Text or Well-Known Binary."
            
        
        
            
            A string like "A Spatial Reference System Identifier (SRID) value could not be retrieved from the specified DbGeography value."
            
        
        
            
            A string like "The specified DbGeography value did not provide either Well-Known Binary or Well-Known Text."
            
        
        
            
            A string like "A Spatial Reference System Identifier (SRID) value could not be retrieved from the specified DbGeometry value."
            
        
        
            
            A string like "The specified DbGeometry value did not provide either Well-Known Binary or Well-Known Text."
            
        
        
            
            A string like "An exception has been raised that is likely due to a transient failure. If you are connecting to a SQL Azure database consider using SqlAzureExecutionStrategy."
            
        
        
            
            A string like "This function can only be invoked from LINQ to Entities."
            
        
        
            
            A string like "AutomaticMigration"
            
        
        
            
            Strongly-typed and parameterized exception factory.
            
        
        
        
            
            InvalidOperationException with message like "The current migration SQL generator ({0}) is unable to generate SQL for operations of type '{1}'. Call SetSqlGenerator on your migrations configuration class to use a different SQL generator. To create a custom SQL generator that can handle this type of operation, add a new class that derives from {0} and override Generate(MigrationOperation)."
            
        
        
            
            The exception that is thrown when the value of an argument is outside the allowable range of values as defined by the invoked method.
            
        
        
            
            The exception that is thrown when the author has yet to implement the logic at this point in the program. This can act as an exception based TODO tag.
            
        
        
            
            The exception that is thrown when an invoked method is not supported, or when there is an attempt to
            read, seek, or write to a stream that does not support the invoked functionality.
            
        
        
            
            AutoGenerated resource class. Usage:
            string s = EntityRes.GetString(EntityRes.MyIdenfitier);
            
        
        
            
            An  that retries actions that throw exceptions caused by SQL Azure transient failures.
            
            
            This execution strategy will retry the operation on  and 
            if the  contains any of the following error numbers:
            40613, 40501, 40197, 10929, 10928, 10060, 10054, 10053, 233, 64 and 20
            
        
        
            
            Creates a new instance of .
            
            
            The default retry limit is 5, which means that the total amount of time spent between retries is 26 seconds plus the random factor.
            
        
        
            
            Creates a new instance of  with the specified limits for
            number of retries and the delay between retries.
            
             The maximum number of retry attempts. 
             The maximum delay in milliseconds between retries. 
        
        
            
        
        
            
            Detects the exceptions caused by SQL Azure transient failures.
            
        
        
            
            Appends raw SQL into the string builder.
            
             Raw SQL string to append into the string builder. 
        
        
            
            Appends new line for visual formatting or for ending a comment.
            
        
        
            
            Append raw SQL into the string builder with formatting options and invariant culture formatting.
            
             A composite format string. 
             An array of objects to format. 
        
        
            
            Contains function stubs that expose SqlServer methods in Linq to Entities.
            
        
        
            Returns the checksum of the values in a collection. Null values are ignored.
            The checksum computed from the input collection.
            The collection of values over which the checksum is computed.
        
        
            Returns the checksum of the values in a collection. Null values are ignored.
            The checksum computed from the input collection.
            The collection of values over which the checksum is computed.
        
        
            Returns the ASCII code value of the left-most character of a character expression.
            The ASCII code of the first character in the input string.
            A valid string.
        
        
            Returns the character that corresponds to the specified integer ASCII value.
            The character that corresponds to the specified ASCII value.
            An ASCII code.
        
        
            Returns the starting position of one expression found within another expression.
            The starting position of  target  if it is found in  toSearch .
            The string expression to be searched.
            The string expression to be found.
        
        
            Returns the starting position of one expression found within another expression.
            The starting position of  target  if it is found in  toSearch .
            The string expression to be searched.
            The string expression to be found.
        
        
            Returns the starting position of one expression found within another expression.
            The starting position of  target  if it is found in  toSearch .
            The string expression to be searched.
            The string expression to be found.
            The character position in  toSearch  where searching begins.
        
        
            Returns the starting position of one expression found within another expression.
            The starting position of  target  if it is found in  toSearch .
            The string expression to be searched.
            The string expression to be found.
            The character position in  toSearch  where searching begins.
        
        
            Returns the starting position of one expression found within another expression.
            
            A  of  value that is the starting position of  target  if it is found in  toSearch .
            
            The string expression to be searched.
            The string expression to be found.
            The character position in  toSearch  where searching begins.
        
        
            Returns the starting position of one expression found within another expression.
            The starting position of  target  if it is found in  toSearch .
            The string expression to be searched.
            The string expression to be found.
            The character position in  toSearch  at which searching begins.
        
        
            Returns an integer value that indicates the difference between the SOUNDEX values of two character expressions.
            The SOUNDEX difference between the two strings.
            The first string.
            The second string.
        
        
            Returns the Unicode character with the specified integer code, as defined by the Unicode standard.
            The character that corresponds to the input character code.
            A character code.
        
        
            Returns the starting position of the first occurrence of a pattern in a specified expression, or zeros if the pattern is not found, on all valid text and character data types.
            The starting character position where the string pattern was found.
            A string pattern to search for.
            The string to search.
        
        
            Returns a Unicode string with the delimiters added to make the input string a valid Microsoft SQL Server delimited identifier.
            The original string with brackets added.
            The expression that quote characters will be added to.
        
        
            Returns a Unicode string with the delimiters added to make the input string a valid Microsoft SQL Server delimited identifier.
            The original string with the specified quote characters added.
            The expression that quote characters will be added to.
            The one-character string to use as the delimiter. It can be a single quotation mark ( ' ), a left or right bracket ( [ ] ), or a double quotation mark ( " ). If quote_character is not specified, brackets are used.
        
        
            Repeats a string value a specified number of times.
            The target string, repeated the number of times specified by  count .
            A valid string.
            The value that specifies how many time to repeat  target .
        
        
            Converts an alphanumeric string to a four-character (SOUNDEX) code to find similar-sounding words or names.
            The SOUNDEX code of the input string.
            A valid string.
        
        
            Returns a string of repeated spaces.
            A string that consists of the specified number of spaces.
            The number of spaces. If negative, a null string is returned.
        
        
            Returns character data converted from numeric data.
            The numeric input expression converted to a string.
            A numeric expression.
        
        
            Returns character data converted from numeric data.
            The input expression converted to a string.
            A numeric expression.
        
        
            Returns character data converted from numeric data.
            The numeric input expression converted to a string.
            A numeric expression.
            The total length of the string. This includes decimal point, sign, digits, and spaces. The default is 10.
        
        
            Returns character data converted from numeric data.
            The input expression converted to a string.
            A numeric expression.
            The total length of the string. This includes decimal point, sign, digits, and spaces. The default is 10.
        
        
            Returns character data converted from numeric data.
            The numeric input expression converted to a string.
            A numeric expression.
            The total length of the string. This includes decimal point, sign, digits, and spaces. The default is 10.
            The number of places to the right of the decimal point.  decimal  must be less than or equal to 16. If  decimal  is more than 16 then the result is truncated to sixteen places to the right of the decimal point.
        
        
            Returns character data converted from numeric data.
            The input expression converted to a string.
            A numeric expression.
            The total length of the string. This includes decimal point, sign, digits, and spaces. The default is 10.
            The number of places to the right of the decimal point.  decimal  must be less than or equal to 16. If  decimal  is more than 16 then the result is truncated to sixteen places to the right of the decimal point.
        
        
            Inserts a string into another string. It deletes a specified length of characters in the target string at the start position and then inserts the second string into the target string at the start position.
            A string consisting of the two strings.
            The target string.
            The character position in  stringinput  where the replacement string is to be inserted.
            The number of characters to delete from  stringInput . If  length  is longer than  stringInput , deletion occurs up to the last character in  stringReplacement .
            The substring to be inserted into  stringInput .
        
        
            Returns the integer value, as defined by the Unicode standard, for the first character of the input expression.
            The character code for the first character in the input string.
            A valid string.
        
        
            A mathematical function that returns the angle, in radians, whose cosine is the specified numerical value. This angle is called the arccosine.
            The angle, in radians, defined by the input cosine value.
            The cosine of an angle.
        
        
            A mathematical function that returns the angle, in radians, whose cosine is the specified numerical value. This angle is called the arccosine.
            An angle, measured in radians.
            The cosine of an angle.
        
        
            A mathematical function that returns the angle, in radians, whose sine is the specified numerical value. This angle is called the arcsine.
            An angle, measured in radians.
            The sine of an angle.
        
        
            A mathematical function that returns the angle, in radians, whose sine is the specified numerical value. This angle is called the arcsine.
            An angle, measured in radians.
            The sine of an angle.
        
        
            A mathematical function that returns the angle, in radians, whose tangent is the specified numerical value. This angle is called the arctangent.
            An angle, measured in radians.
            The tangent of an angle.
        
        
            A mathematical function that returns the angle, in radians, whose tangent is the specified numerical value. This angle is called the arctangent.
            An angle, measured in radians.
            The tangent of an angle.
        
        
            Returns the positive angle, in radians, between the positive x-axis and the ray from the origin through the point (x, y), where x and y are the two specified numerical values. The first parameter passed to the function is the y-value and the second parameter is the x-value.
            An angle, measured in radians.
            The y-coordinate of a point.
            The x-coordinate of a point.
        
        
            Returns the positive angle, in radians, between the positive x-axis and the ray from the origin through the point (x, y), where x and y are the two specified numerical values. The first parameter passed to the function is the y-value and the second parameter is the x-value.
            An angle, measured in radians.
            The y-coordinate of a point.
            The x-coordinate of a point.
        
        
            Returns the trigonometric cosine of the specified angle, in radians, in the specified expression.
            The trigonometric cosine of the specified angle.
            An angle, measured in radians.
        
        
            Returns the trigonometric cosine of the specified angle, in radians, in the specified expression.
            The trigonometric cosine of the specified angle.
            An angle, measured in radians.
        
        
            A mathematical function that returns the trigonometric cotangent of the specified angle, in radians.
            The trigonometric cotangent of the specified angle.
            An angle, measured in radians.
        
        
            A mathematical function that returns the trigonometric cotangent of the specified angle, in radians.
            The trigonometric cotangent of the specified angle.
            An angle, measured in radians.
        
        
            Returns the corresponding angle in degrees for an angle specified in radians.
            The specified angle converted to degrees.
            An angle, measured in radians.
        
        
            Returns the corresponding angle in degrees for an angle specified in radians.
            The specified angle converted to degrees.
            An angle, measured in radians.
        
        
            Returns the corresponding angle in degrees for an angle specified in radians.
            The specified angle converted to degrees.
            An angle, measured in radians.
        
        
            Returns the corresponding angle in degrees for an angle specified in radians.
            The specified angle converted to degrees.
            An angle, measured in radians.
        
        
            Returns the exponential value of the specified float expression.
            The constant e raised to the power of the input value.
            The input value.
        
        
            Returns the exponential value of the specified float expression.
            The constant e raised to the power of the input value.
            The input value.
        
        
            Returns the natural logarithm of the specified input value.
            The natural logarithm of the input value.
            A numeric expression.
        
        
            Returns the natural logarithm of the specified input value.
            The natural logarithm of the input value.
            A numeric expression.
        
        
            Returns the base-10 logarithm of the specified input value.
            The base-10 logarithm of the input value.
            A numeric expression.
        
        
            Returns the base-10 logarithm of the specified input value.
            The base-10 logarithm of the input value.
            A numeric expression.
        
        
            Returns the constant value of pi.
            The numeric value of pi.
        
        
            Returns the radian measure corresponding to the specified angle in degrees.
            The radian measure of the specified angle.
            The angle, measured in degrees
        
        
            Returns the radian measure corresponding to the specified angle in degrees.
            The radian measure of the specified angle.
            The angle, measured in degrees
        
        
            Returns the radian measure corresponding to the specified angle in degrees.
            The radian measure of the specified angle.
            The angle, measured in degrees.
        
        
            Returns the radian measure corresponding to the specified angle in degrees.
            The radian measure of the specified angle.
            The angle, measured in degrees.
        
        
            Returns a pseudo-random float value from 0 through 1, exclusive.
            The pseudo-random value.
        
        
            Returns a pseudo-random float value from 0 through 1, exclusive.
            The pseudo-random value.
            The seed value. If  seed  is not specified, the SQL Server Database Engine assigns a seed value at random. For a specified seed value, the result returned is always the same.
        
        
            Returns the positive (+1), zero (0), or negative (-1) sign of the specified expression.
            The sign of the input expression.
            A numeric expression.
        
        
            Returns the positive (+1), zero (0), or negative (-1) sign of the specified expression.
            The sign of the input expression.
            A numeric expression.
        
        
            Returns the positive (+1), zero (0), or negative (-1) sign of the specified expression.
            The sign of the input expression.
            A numeric expression.
        
        
            Returns the positive (+1), zero (0), or negative (-1) sign of the specified expression.
            The sign of the input expression.
            A numeric expression.
        
        
            Returns the trigonometric sine of the specified angle.
            The trigonometric sine of the input expression.
            An angle, measured in radians.
        
        
            Returns the trigonometric sine of the specified angle.
            The trigonometric sine of the input expression.
            An angle, measured in radians.
        
        
            Returns the square root of the specified number.
            The square root of the input value.
            A numeric expression.
        
        
            Returns the square root of the specified number.
            The square root of the input value.
            A numeric expression.
        
        
            Returns the square of the specified number.
            The square of the input value.
            A numeric expression.
        
        
            Returns the square of the specified number.
            The square of the input value.
            A numeric expression.
        
        
            Returns the trigonometric tangent of the input expression.
            The tangent of the input angle.
            An angle, measured in radians.
        
        
            Returns the trigonometric tangent of the input expression.
            The tangent of the input angle.
            An angle, measured in radians.
        
        
            Returns a new datetime value based on adding an interval to the specified date.
            The new date.
            The part of the date to increment. 
            The value used to increment a date by a specified amount.
            The date to increment.
        
        
            Returns a new time span value based on adding an interval to the specified time span.
            The new time span.
            The part of the date to increment.
            The value used to increment a date by a specified amount.
            The time span to increment.
        
        
            Returns a new date value based on adding an interval to the specified date.
            The new point in time, expressed as a date and time of day, relative to Coordinated Universal Time (UTC).
            The part of the date to increment.
            The value used to increment a date by a specified amount.
            The date to increment.
        
        
            Returns a new datetime value based on adding an interval to the specified date.
            
            A  of  value that is the new date.
            
            The part of the date to increment.
            The value used to increment a date by a specified amount.
            The date to increment.
        
        
            Returns the count of the specified datepart boundaries crossed between the specified start date and end date.
            The number of time intervals between the two dates.
            The part of the date to calculate the differing number of time intervals.
            The first date.
            The second date.
        
        
            Returns the count of the specified datepart boundaries crossed between the specified start date and end date.
            The number of time intervals between the two dates.
            The part of the date to calculate the differing number of time intervals.
            The first date.
            The second date.
        
        
            Returns the count of the specified datepart boundaries crossed between the specified start date and end date.
            The number of time intervals between the two dates.
            The part of the date to calculate the differing number of time intervals.
            The first date.
            The second date.
        
        
            Returns the count of the specified datepart boundaries crossed between the specified start date and end date.
            The number of time intervals between the two dates.
            The part of the date to calculate the differing number of time intervals.
            The first date.
            The second date.
        
        
            Returns the count of the specified datepart boundaries crossed between the specified start date and end date.
            The number of time intervals between the two dates.
            The part of the date to calculate the differing number of time intervals.
            The first date.
            The second date.
        
        
            Returns the count of the specified datepart boundaries crossed between the specified start date and end date.
            The value specifying the number of time intervals between the two dates.
            The part of the date to calculate the differing number of time intervals.
            The first date.
            The second date.
        
        
            Returns the count of the specified datepart boundaries crossed between the specified start date and end date.
            The number of time intervals between the two dates.
            The part of the date to calculate the differing number of time intervals.
            The first date.
            The second date.
        
        
            Returns the count of the specified datepart boundaries crossed between the specified start date and end date.
            The number of time intervals between the two dates.
            The part of the date to calculate the differing number of time intervals.
            The first date.
            The second date.
        
        
            Returns the count of the specified datepart boundaries crossed between the specified start date and end date.
            The number of time intervals between the two dates.
            The part of the date to calculate the differing number of time intervals.
            The first date.
            The second date.
        
        
            Returns the count of the specified datepart boundaries crossed between the specified start date and end date.
            The number of time intervals between the two dates.
            The part of the date to calculate the differing number of time intervals.
            The first date.
            The second date.
        
        
            Returns the count of the specified datepart boundaries crossed between the specified start date and end date.
            The number of time intervals between the two dates.
            The part of the date to calculate the differing number of time intervals.
            The first date.
            The second date.
        
        
            Returns the count of the specified datepart boundaries crossed between the specified start date and end date.
            The number of time intervals between the two dates.
            The part of the date to calculate the differing number of time intervals.
            The first date.
            The second date.
        
        
            Returns the count of the specified datepart boundaries crossed between the specified start date and end date.
            The number of time intervals between the two dates.
            The part of the date to calculate the differing number of time intervals.
            The first date.
            The second date.
        
        
            Returns the count of the specified datepart boundaries crossed between the specified start date and end date.
            The number of time intervals between the two Dates.
            The part of the date to calculate the differing number of time intervals.
            The first date.
            The second date.
        
        
            Returns the count of the specified datepart boundaries crossed between the specified start date and end date.
            The number of time intervals between the two dates.
            The part of the date to calculate the differing number of time intervals.
            The first date.
            The second date.
        
        
            Returns the count of the specified datepart boundaries crossed between the specified start date and end date.
            The number of time intervals between the two dates.
            The part of the date to calculate the differing number of time intervals.
            The first date.
            The second date.
        
        
            Returns a character string that represents the specified datepart of the specified date.
            The specified part of the specified date.
            The part of the date to calculate the differing number of time intervals.
            The date.
        
        
            Returns a character string that represents the specified datepart of the specified date.
            The specified part of the specified date.
            The part of the date to calculate the differing number of time intervals.
            The date.
        
        
            Returns a character string that represents the specified datepart of the specified date.
            The specified part of the specified date.
            The part of the date to calculate the differing number of time intervals.
            The date.
        
        
            Returns a character string that represents the specified datepart of the specified date.
            The specified part of the specified date.
            The part of the date to calculate the differing number of time intervals.
            The date.
        
        
            Returns an integer that represents the specified datepart of the specified date.
            The the specified datepart of the specified date.
            The part of the date to return the value.
            The date.
        
        
            Returns an integer that represents the specified datepart of the specified date.
            The specified datepart of the specified date.
            The part of the date to return the value.
            The date.
        
        
            Returns an integer that represents the specified datepart of the specified date.
            The specified datepart of the specified date.
            The part of the date to return the value.
            The date.
        
        
            Returns an integer that represents the specified datepart of the specified date.
            The specified datepart of the specified date.
            The part of the date to return the value.
            The date.
        
        
            Returns the current database system timestamp as a datetime value without the database time zone offset. This value is derived from the operating system of the computer on which the instance of SQL Server is running.
            The current database timestamp.
        
        
            Returns the current database system timestamp as a datetime value. The database time zone offset is not included. This value represents the current UTC time (Coordinated Universal Time). This value is derived from the operating system of the computer on which the instance of SQL Server is running.
            The current database UTC timestamp.
        
        
            Returns the number of bytes used to represent any expression.
            The number of bytes in the input value.
            The value to be examined for data length.
        
        
            Returns the number of bytes used to represent any expression.
            The number of bytes in the input value.
            The value to be examined for data length.
        
        
            Returns the number of bytes used to represent any expression.
            The number of bytes in the input value.
            The value to be examined for data length.
        
        
            Returns the number of bytes used to represent any expression.
            The number of bytes in the input value.
            The value to be examined for data length.
        
        
            Returns the number of bytes used to represent any expression.
            The number of bytes in the input value.
            The value to be examined for data length.
        
        
            Returns the number of bytes used to represent any expression.
            The number of bytes in the input value.
            The value to be examined for data length.
        
        
            Returns the number of bytes used to represent any expression.
            The number of bytes in the input value.
            The value to be examined for data length.
        
        
            Returns the number of bytes used to represent any expression.
            The number of bytes in the input value.
            The value to be examined for length.
        
        
            Returns the number of bytes used to represent any expression.
            The number of bytes in the input value.
            The value to be examined for data length.
        
        
            Returns the checksum value computed over the input argument.
            The checksum computed over the input value.
            The value for which the checksum is calculated.
        
        
            Returns the checksum value computed over the input argument.
            The checksum computed over the input value.
            The value for which the checksum is calculated.
        
        
            Returns the checksum value computed over the input argument.
            The checksum computed over the input value.
            The value for which the checksum is calculated.
        
        
            Returns the checksum value computed over the input argument.
            The checksum computed over the input value.
            The value for which the checksum is calculated.
        
        
            Returns the checksum value computed over the input argument.
            The checksum computed over the input values.
            The value for which the checksum is calculated.
        
        
            Returns the checksum value computed over the input argument.
            The checksum computed over the input value.
            The value for which the checksum is calculated.
        
        
            Returns the checksum value computed over the input argument.
            The checksum computed over the input value.
            The value for which the checksum is calculated.
        
        
            Returns the checksum value computed over the input argument.
            The checksum computed over the input value.
            The character array for which the checksum is calculated.
        
        
            Returns the checksum value computed over the input argument.
            The checksum computed over the input value.
            The value for which the checksum is calculated.
        
        
            Returns the checksum value computed over the input arguments.
            The checksum computed over the input values.
            The value for which the checksum is calculated.
            The value for which the checksum is calculated.
        
        
            Returns the checksum value computed over the input arguments.
            The checksum computed over the input values.
            The value for which the checksum is calculated.
            The value for which the checksum is calculated.
        
        
            Returns the checksum value computed over the input arguments.
            The checksum computed over the input values.
            The value for which the checksum is calculated.
            The value for which the checksum is calculated.
        
        
            Returns the checksum value computed over the input arguments.
            The checksum computed over the input values.
            The value for which the checksum is calculated.
            The value for which the checksum is calculated.
        
        
            Returns the checksum value computed over the input arguments.
            The checksum computed over the input values.
            The value for which the checksum is calculated.
            The value for which the checksum is calculated.
        
        
            Returns the checksum value computed over the input arguments.
            The checksum computed over the input values.
            The value for which the checksum is calculated.
            The value for which the checksum is calculated.
        
        
            Returns the checksum value computed over the input arguments.
            The checksum computed over the input values.
            The value for which the checksum is calculated.
            The value for which the checksum is calculated.
        
        
            Returns the checksum value computed over the input arguments.
            The checksum computed over the input values.
            The character array for which the checksum is calculated.
            The character array for which the checksum is calculated.
        
        
            Returns the checksum value computed over the input arguments.
            The checksum computed over the input values.
            The value for which the checksum is calculated.
            The value for which the checksum is calculated.
        
        
            Returns the checksum value computed over the input arguments.
            The checksum computed over the input values.
            The value for which the checksum is calculated.
            The value for which the checksum is calculated.
            The value for which the checksum is calculated.
        
        
            Returns the checksum value computed over the input arguments.
            The checksum computed over the input values.
            The value for which the checksum is calculated.
            The value for which the checksum is calculated.
            The value for which the checksum is calculated.
        
        
            Returns the checksum value computed over the input arguments.
            The checksum computed over the input values.
            The value for which the checksum is calculated.
            The value for which the checksum is calculated.
            The value for which the checksum is calculated.
        
        
            Returns the checksum value computed over the input arguments.
            The checksum computed over the input values.
            The value for which the checksum is calculated.
            The value for which the checksum is calculated.
            The value for which the checksum is calculated.
        
        
            Returns the checksum value computed over the input arguments.
            The checksum computed over the input values.
            The value for which the checksum is calculated.
            The value for which the checksum is calculated.
            The value for which the checksum is calculated.
        
        
            Returns the checksum value computed over the input arguments.
            The checksum computed over the input values.
            The value for which the checksum is calculated.
            The value for which the checksum is calculated.
            The value for which the checksum is calculated.
        
        
            Returns the checksum value computed over the input arguments.
            The checksum computed over the input values.
            The value for which the checksum is calculated.
            The value for which the checksum is calculated.
            The value for which the checksum is calculated.
        
        
            Returns the checksum value computed over the input arguments.
            The checksum computed over the input values.
            The character array for which the checksum is calculated.
            The character array for which the checksum is calculated.
            The character array for which the checksum is calculated.
        
        
            Returns the checksum value computed over the input arguments.
            The checksum computed over the input values.
            The value for which the checksum is calculated.
            The value for which the checksum is calculated.
            The value for which the checksum is calculated.
        
        
            Returns the current date and time. 
            The current date and time.
        
        
            Returns the name of the current user.
            The name of the current user.
        
        
            Returns the workstation name.
            The name of the workstation.
        
        
            Returns a database user name corresponding to a specified identification number.
            The user name.
            A user ID.
        
        
            Returns a database user name corresponding to a specified identification number.
            The user name.
        
        
            Indicates whether the input value is a valid numeric type.
            1 if the input expression is a valid numeric data type; otherwise, 0.
            A string expression.
        
        
            Indicates whether the input value is a valid date or time.
            1 if the input expression is a valid date or time value of datetime or smalldatetime data types; otherwise, 0.
            The tested value.
        
        
            
            Used for wrapping a boolean value as an object.
            
        
        
            
            Class generating SQL for a DML command tree.
            
        
        
            
            Determine whether we should use a generated values variable to return server generated values.
            This is true when we're attempting to insert a row where the primary key is server generated
            but is not an integer type (and therefore can't be used with scope_identity()). It is also true
            where there is a compound server generated key.
            
        
        
            
            Generates SQL fragment returning server-generated values.
            Requires: translator knows about member values so that we can figure out
            how to construct the key predicate.
            Sample SQL:
            
                select IdentityValue
                from dbo.MyTable
                where @@ROWCOUNT > 0 and IdentityValue = scope_identity()
            
                or
            
                select TimestampValue
                from dbo.MyTable
                where @@ROWCOUNT > 0 and Id = 1
            
                Note that we filter on rowcount to ensure no rows are returned if no rows were modified.
            
                On SQL Server 2005 and up, we have an additional syntax used for non integer return types:
            
                declare @generatedValues table(ID uniqueidentifier)
                insert dbo.MyTable
                output ID into @generated_values
                values (...);
                select ID
                from @generatedValues as g join dbo.MyTable as t on g.ID = t.ID
                where @@ROWCOUNT > 0;
            
             Builder containing command text 
             Modification command tree 
             Type of table. 
             Translator used to produce DML SQL statement for the tree 
             Returning expression. If null, the method returns immediately without producing a SELECT statement. 
        
        
            
            Lightweight expression translator for DML expression trees, which have constrained
            scope and support.
            
        
        
            
            Initialize a new expression translator populating the given string builder
            with command text. Command text builder and command tree must not be null.
            
             Command text with which to populate commands 
             Command tree generating SQL 
             Indicates whether the translator should preserve member values while compiling t-SQL (only needed for server generation) 
        
        
            
            Call this method to register a property value pair so the translator "remembers"
            the values for members of the row being modified. These values can then be used
            to form a predicate for server-generation (based on the key of the row)
            
             DbExpression containing the column reference (property expression). 
             DbExpression containing the value of the column. 
        
        
            
            Provider to convert provider agnostic migration operations into SQL commands
            that can be run against a Microsoft SQL Server database.
            
        
        
            
            Converts a set of migration operations into Microsoft SQL Server specific SQL.
            
             The operations to be converted. 
             Token representing the version of SQL Server being targeted (i.e. "2005", "2008"). 
             A list of SQL statements to be executed to perform the migration operations. 
        
        
            
            Generates the SQL body for a stored procedure.
            
            The command trees representing the commands for an insert, update or delete operation.
            The rows affected parameter name.
            The provider manifest token.
            The SQL body for the stored procedure.
        
        
            
            Generates the specified update database operation which represents applying a series of migrations.
            The generated script is idempotent, meaning it contains conditional logic to check if individual migrations 
            have already been applied and only apply the pending ones.
            
            The update database operation.
        
        
            
            Generates SQL for a .
            Allows derived providers to handle additional operation types.
            Generated SQL should be added using the Statement method.
            
             The operation to produce SQL for. 
        
        
            
            Creates an empty connection for the current provider.
            Allows derived providers to use connection other than .
            
             An empty connection for the current provider. 
        
        
            
            Generates the specified create procedure operation.
            
            The create procedure operation.
        
        
            
            Generates the specified alter procedure operation.
            
            The alter procedure operation.
        
        
            
            Generates the specified drop procedure operation.
            
            The drop procedure operation.
        
        
            
            Generates SQL for a .
            Generated SQL should be added using the Statement method.
            
             The operation to produce SQL for. 
        
        
            
            Generates SQL to mark a table as a system table.
            Generated SQL should be added using the Statement method.
            
             The table to mark as a system table. 
             The  to write the generated SQL to. 
        
        
            
            Generates SQL to create a database schema.
            Generated SQL should be added using the Statement method.
            
             The name of the schema to create. 
        
        
            
            Generates SQL for a .
            Generated SQL should be added using the Statement method.
            
             The operation to produce SQL for. 
        
        
            
            Generates SQL for a .
            Generated SQL should be added using the Statement method.
            
             The operation to produce SQL for. 
        
        
            
            Generates SQL for a .
            Generated SQL should be added using the Statement method.
            
             The operation to produce SQL for. 
        
        
            
            Generates SQL for a .
            Generated SQL should be added using the Statement method.
            
             The operation to produce SQL for. 
        
        
            
            Generates SQL for a .
            Generated SQL should be added using the Statement method.
            
             The operation to produce SQL for. 
        
        
            
            Generates SQL for a .
            Generated SQL should be added using the Statement method.
            
             The operation to produce SQL for. 
        
        
            
            Generates SQL for a .
            Generated SQL should be added using the Statement method.
            
             The operation to produce SQL for. 
        
        
            
            Generates SQL for a .
            Generated SQL should be added using the Statement method.
            
             The operation to produce SQL for. 
        
        
            
            Generates SQL for a .
            Generated SQL should be added using the Statement method.
            
             The operation to produce SQL for. 
        
        
            
            Generates SQL for a .
            Generated SQL should be added using the Statement method.
            
             The operation to produce SQL for. 
        
        
            
            Generates SQL for a .
            Generated SQL should be added using the Statement method.
            
             The operation to produce SQL for. 
        
        
            
            Generates SQL for a .
            Generated SQL should be added using the Statement method.
            
             The operation to produce SQL for. 
        
        
            
            Generates SQL for a .
            Generated SQL should be added using the Statement method.
            
             The operation to produce SQL for. 
        
        
            
            Generates the specified rename procedure operation.
            
            The rename procedure operation.
        
        
            
            Generates the specified move procedure operation.
            
            The move procedure operation.
        
        
            
            Generates SQL for a .
            Generated SQL should be added using the Statement method.
            
             The operation to produce SQL for. 
        
        
            
            Generates SQL for a .
            Generated SQL should be added using the Statement method.
            
             The operation to produce SQL for. 
        
        
            
            Generates SQL to specify a constant byte[] default value being set on a column.
            This method just generates the actual value, not the SQL to set the default value.
            
             The value to be set. 
             SQL representing the default value. 
        
        
            
            Generates SQL to specify a constant bool default value being set on a column.
            This method just generates the actual value, not the SQL to set the default value.
            
             The value to be set. 
             SQL representing the default value. 
        
        
            
            Generates SQL to specify a constant DateTime default value being set on a column.
            This method just generates the actual value, not the SQL to set the default value.
            
             The value to be set. 
             SQL representing the default value. 
        
        
            
            Generates SQL to specify a constant DateTimeOffset default value being set on a column.
            This method just generates the actual value, not the SQL to set the default value.
            
             The value to be set. 
             SQL representing the default value. 
        
        
            
            Generates SQL to specify a constant Guid default value being set on a column.
            This method just generates the actual value, not the SQL to set the default value.
            
             The value to be set. 
             SQL representing the default value. 
        
        
            
            Generates SQL to specify a constant string default value being set on a column.
            This method just generates the actual value, not the SQL to set the default value.
            
             The value to be set. 
             SQL representing the default value. 
        
        
            
            Generates SQL to specify a constant TimeSpan default value being set on a column.
            This method just generates the actual value, not the SQL to set the default value.
            
             The value to be set. 
             SQL representing the default value. 
        
        
            
            Generates SQL to specify a constant geogrpahy default value being set on a column.
            This method just generates the actual value, not the SQL to set the default value.
            
             The value to be set. 
             SQL representing the default value. 
        
        
            
            Generates SQL to specify a constant geometry default value being set on a column.
            This method just generates the actual value, not the SQL to set the default value.
            
             The value to be set. 
             SQL representing the default value. 
        
        
            
            Generates SQL to specify a constant default value being set on a column.
            This method just generates the actual value, not the SQL to set the default value.
            
             The value to be set. 
             SQL representing the default value. 
        
        
            
            Generates SQL to specify the data type of a column.
            This method just generates the actual type, not the SQL to create the column.
            
             The definition of the column. 
             SQL representing the data type. 
        
        
            
            Generates a quoted name. The supplied name may or may not contain the schema.
            
             The name to be quoted. 
             The quoted name. 
        
        
            
            Quotes an identifier for SQL Server.
            
             The identifier to be quoted. 
             The quoted identifier. 
        
        
            
            Adds a new Statement to be executed against the database.
            
             The statement to be executed. 
             Gets or sets a value indicating whether this statement should be performed outside of the transaction scope that is used to make the migration process transactional. If set to true, this operation will not be rolled back if the migration process fails. 
        
        
            
            Gets a new  that can be used to build SQL.
            This is just a helper method to create a writer. Writing to the writer will
            not cause SQL to be registered for execution. You must pass the generated
            SQL to the Statement method.
            
             An empty text writer to use for SQL generation. 
        
        
            
            Adds a new Statement to be executed against the database.
            
             The writer containing the SQL to be executed. 
        
        
            
            Creates a shallow copy of the source CreateTableOperation and the associated
            AddPrimaryKeyOperation but renames the table and the primary key in order
            to avoid name conflicts with existing objects.
            
        
        
            
            Returns the column default value to use for store-generated GUID columns when
            no default value is explicitly specified in the migration.
            Returns newsequentialid() for on-premises SQL Server 2005 and later.
            Returns newid() for SQL Azure.
            
            Either newsequentialid() or newid() as described above.
        
        
            
            Contains function stubs that expose SqlServer methods in Linq to Entities.
            
        
        
            Constructs a geography instance representing a Point instance from its x and y values and a spatial reference ID (SRID). 
            The constructed geography instance.
            The x-coordinate of the Point being generated.
            The y-coordinate of the Point being generated
            The SRID of the geography instance.
        
        
            Returns the Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation of a geography instance augmented with any Z (elevation) and M (measure) values carried by the instance.
            The Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation of a geography instance.
            The geography value.
        
        
            Returns a geometric object representing the union of all point values whose distance from a geography instance is less than or equal to a specified value, allowing for a specified tolerance.
            The union of all point values whose distance from a geography instance is less than or equal to a specified value
            The geography value.
            The distance.
            The specified tolerance.
            Specifying whether the tolerance value is relative or absolute.
        
        
            Returns the maximum angle between the point returned by EnvelopeCenter() and a point in the geography instance in degrees.
            the maximum angle between the point returned by EnvelopeCenter().
            The geography value.
        
        
            Returns a point that can be used as the center of a bounding circle for the geography instance.
            A SqlGeography value that specifies the location of the center of a bounding circle.
            The geography value.
        
        
            Offers a fast, index-only intersection method to determine if a geography instance intersects another SqlGeography instance, assuming an index is available.
            True if a geography instance potentially intersects another SqlGeography instance; otherwise, false.
            The geography value.
            Another geography instance to compare against the instance on which Filter is invoked.
        
        
            Tests if the SqlGeography instance is the same as the specified type.
            A string that specifies one of the 12 types exposed in the geography type hierarchy.
            The geography value.
            A string that specifies one of the 12 types exposed in the geography type hierarchy.
        
        
            Returns the total number of rings in a Polygon instance.
            The total number of rings.
            The geography value.
        
        
            Returns an approximation of the given geography instance produced by running the Douglas-Peucker algorithm on the instance with the given tolerance.
            
            Returns .
            
            The geography value.
            The tolerance to input to the Douglas-Peucker algorithm. tolerance must be a positive number.
        
        
            Returns the specified ring of the SqlGeography instance: 1 ≤ n ≤ NumRings().
            A SqlGeography object that represents the ring specified by n.
            The geography value.
            An int expression between 1 and the number of rings in a polygon instance.
        
        
            Constructs a geometry instance representing a Point instance from its x and y values and a spatial reference ID (SRID). 
            The constructed geometry instance.
            The x-coordinate of the Point being generated.
            The y-coordinate of the Point being generated
            The SRID of the geography instance.
        
        
            Returns the Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation of a geography instance augmented with any Z (elevation) and M (measure) values carried by the instance.
            The Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation of a geometry instance.
            The geometry value.
        
        
            Returns a geometric object representing the union of all point values whose distance from a geometry instance is less than or equal to a specified value, allowing for a specified tolerance.
            The union of all point values whose distance from a geometry instance is less than or equal to a specified value
            The geometry value.
            The distance.
            The specified tolerance.
            Specifying whether the tolerance value is relative or absolute.
        
        
            Tests if the SqlGeometry instance is the same as the specified type.
            A string that specifies one of the 12 types exposed in the geography type hierarchy.
            The geometry value.
            A string that specifies one of the 12 types exposed in the geography type hierarchy.
        
        
            Offers a fast, index-only intersection method to determine if a geography instance intersects another SqlGeometry instance, assuming an index is available.
            True if a geography instance potentially intersects another SqlGeography instance; otherwise, false.
            The geometry value.
            Another geography instance to compare against the instance on which Filter is invoked.
        
        
            Converts an invalid geometry instance into a geometry instance with a valid Open Geospatial Consortium (OGC) type. 
            The converted geometry instance.
            The geometry value.
        
        
            Returns an approximation of the given geography instance produced by running the Douglas-Peucker algorithm on the instance with the given tolerance.
            
            Returns .
            
            The geometry value.
            The tolerance to input to the Douglas-Peucker algorithm. tolerance must be a positive number.
        
        
            
            Used to create an instance of  for a specific SQL Types assembly
            such that it can be used for converting EF spatial types backed by one version to those backed by
            the version actually in use in this app domain.
            
        
        
            
            Returns the highest available version of the Microsoft.SqlServer.Types assembly that could be
            located using Assembly.Load; may return null if no version of the assembly could be found.
            
        
        
            
            This class is a simple utility class that determines the SQL Server version from the
            connection.
            
        
        
            
            Get the SqlVersion from the connection. Returns one of Sql8, Sql9, Sql10, Sql11
            The passed connection must be open
            
             current sql connection 
             Sql Version for the current connection 
        
        
            
            This is a wrapper for  that allows a mock implementation to be used.
            
        
        
            
            Uses a stack to non-recursively traverse a given tree structure and retrieve the leaf nodes.
            
             The node that represents the root of the tree. 
             Expressions not of this kind are considered leaves. 
            
            A function that traverses the tree by retrieving the immediate descendants of a (non-leaf) node.
            
             An enumerable containing the leaf nodes. 
        
        
            
            Represents the sql fragment for any node in the query tree.
            
            
            The nodes in a query tree produce various kinds of sql
            
                - A select statement.
- A reference to an extent. (symbol)
- A raw string.
We have this interface to allow for a common return type for the methods
            in the expression visitor 
            Add the endd of translation, the sql fragments are converted into real strings.
            
        
        
            
            Write the string represented by this fragment into the stream.
            
             The stream that collects the strings. 
             Context information used for renaming. The global lists are used to generated new names without collisions. 
        
        
            
            A Join symbol is a special kind of Symbol.
            It has to carry additional information
                - 
                    ColumnList for the list of columns in the select clause if this
                    symbol represents a sql select statement.  This is set by
                    
                    .
                
- ExtentList is the list of extents in the select clause.
- 
                    FlattenedExtentList - if the Join has multiple extents flattened at the
                    top level, we need this information to ensure that extent aliases are renamed
                    correctly in
                    
                
- 
                    NameToExtent has all the extents in ExtentList as a dictionary.
                    This is used by
                    
                    to flatten
                    record accesses.
                
- 
                    IsNestedJoin - is used to determine whether a JoinSymbol is an
                    ordinary join symbol, or one that has a corresponding SqlSelectStatement.
                
All the lists are set exactly once, and then used for lookups/enumerated.
            
        
        
            
            
            This class represents an extent/nested select statement,
            or a column.
            The important fields are Name, Type and NewName.
            NewName starts off the same as Name, and is then modified as necessary.
            The rest are used by special symbols.
            e.g. NeedsRenaming is used by columns to indicate that a new name must
            be picked for the column in the second phase of translation.
            IsUnnest is used by symbols for a collection expression used as a from clause.
            This allows  to add the column list
            after the alias.
            
        
        
            
            Used to track the columns originating from this Symbol when it is used
            in as a from extent in a SqlSelectStatement with a Join or as a From Extent
            in a Join Symbol.
            
        
        
            
            Used to track the output columns of a SqlSelectStatement it represents
            
        
        
            
            Use this constructor if the symbol represents a SqlStatement for which the output columns need to be tracked.
            
        
        
            
            Write this symbol out as a string for sql.  This is just
            the new name of the symbol (which could be the same as the old name).
            We rename columns here if necessary.
            
        
        
            
            Represents a column in a select list that should be printed only if it is later used.
            Such columns get added by .
            The SymbolUsageManager associated with the OptionalColumn has the information whether the column
            has been used based on its symbol.
            
        
        
            
            Append to the "fragment" representing this column
            
        
        
            
            Writes that fragment that represents the optional column
            if the usage manager says it is used.
            
        
        
            
            The Sql8ConformanceChecker walks a DbExpression tree and determines whether
            it should be rewritten in order to be translated to SQL appropriate for SQL Server 2000.
            The tree should be rewritten if it contains any of the following expressions:
                - 
                    
                
- 
                    
                
- 
                    
                
Also, it throws if it determines that the tree can not
            be translated into SQL appropriate for SQL Server 2000.
            This happens if:
                - 
                    The tree contains
                    
                
- 
                    The tree contains
                    
                    with property Limit of type
                    
                
- 
                    The tree contains
                    
                    with property Count of type
                    
                
The visitor only checks for expressions for which the support differs between SQL Server 2000 and SQL Server 2005,
            but does not check/throw for expressions that are not supported for both providers.
            Implementation note: In the cases when the visitor encounters an expression that requires rewrite,
            it still needs to walk its structure in case something below it is not supported and needs to throw.
            
        
        
            
            The entry point
            
             True if the tree needs to be rewriten, false otherwise 
        
        
            
            Default Constructor
            
        
        
            
            Default handling for DbUnaryExpression-derived classes. Simply visits its argument
            
             The DbUnaryExpression to visit 
        
        
            
            Default handling for DbBinaryExpression-derived classes. Visits both arguments.
            
             The DbBinaryExpression to visit 
        
        
            
            Walks the structure
            
        
        
            
            DbExpressionBinding handler
            
        
        
            
            Used as handler for expressions
            
        
        
            
            Used as handler for SortClauses
            
        
        
            
            Helper method for iterating a list
            
        
        
            
            Handing for list of s.
            
        
        
            
            Handing for list of s.
            
        
        
            
            Handing for list of s.
            
        
        
            
            Handling for list of s.
            
        
        
            
            Called when an  of an otherwise unrecognized type is encountered.
            
             The expression 
            
            Always thrown if this method is called, since it indicates that
            
            is of an unsupported type
            
        
        
            
            
            
             The DbAndExpression that is being visited. 
        
        
            
            Not supported on SQL Server 2000.
            
             The DbApplyExpression that is being visited. 
            Always
        
        
            
            Default handling for DbArithmeticExpression. Visits all arguments.
            
             The DbArithmeticExpression that is being visited. 
        
        
            
            Walks the strucutre
            
             The DbCaseExpression that is being visited. 
        
        
            
            
            
             The DbCastExpression that is being visited. 
        
        
            
            
            
             The DbComparisonExpression that is being visited. 
        
        
            
            Returns false
            
             The DbConstantExpression that is being visited. 
        
        
            
            Walks the structure
            
             The DbCrossJoinExpression that is being visited. 
        
        
            
            
            
             The DeRefExpression that is being visited. 
        
        
            
            
            
             The DbDistinctExpression that is being visited. 
        
        
            
            
            
             The DbElementExpression that is being visited. 
        
        
            
            
            
             The DbEntityRefExpression that is being visited. 
        
        
            
            Returns true, the tree needs to be rewritten.
            
             The DbExceptExpression that is being visited. 
        
        
            
            Walks the structure
            
             The DbFilterExpression that is being visited. 
        
        
            
            Visits the arguments
            
             The DbFunctionExpression that is being visited. 
        
        
            
            Visits the arguments and lambda body
            
             The DbLambdaExpression that is being visited. 
        
        
            
            Walks the structure
            
             The DbExpression that is being visited. 
        
        
            
            Returns true.
            
             The DbIntersectExpression that is being visited. 
        
        
            
            
            
             The DbIsEmptyExpression that is being visited. 
        
        
            
            
            
             The DbIsNullExpression that is being visited. 
        
        
            
            
            
             The DbIsOfExpression that is being visited. 
        
        
            
            Walks the structure
            
             The DbJoinExpression that is being visited. 
        
        
            
            Walks the structure
            
             The DbLikeExpression that is being visited. 
        
        
            
            Walks the structure
            
            expression.Limit is DbParameterReferenceExpression
        
        
            
            Walks the arguments
            
             The DbNewInstanceExpression that is being visited. 
        
        
            
            
            
             The DbNotExpression that is being visited. 
        
        
            
            Returns false
            
             The DbNullExpression that is being visited. 
             false 
        
        
            
            
            
             The DbOfTypeExpression that is being visited. 
        
        
            
            
            
             The DbOrExpression that is being visited. 
        
        
            
            
            
             The DbInExpression that is being visited. 
        
        
            
            Returns false
            
             The DbParameterReferenceExpression that is being visited. 
        
        
            
            Walks the structure
            
             The DbProjectExpression that is being visited. 
        
        
            
            Returns false
            
             The DbPropertyExpression that is being visited. 
        
        
            
            Walks the structure
            
             The DbQuantifierExpression that is being visited. 
        
        
            
            
            
             The DbRefExpression that is being visited. 
        
        
            
            
            
             The DbRefKeyExpression that is being visited. 
        
        
            
            Walks the structure
            
             The DbRelationshipNavigationExpression that is being visited. 
        
        
            
            Returns false;
            
             The DbScanExpression that is being visited. 
        
        
            
            Resturns true
            
            expression.Count is DbParameterReferenceExpression
        
        
            
            Walks the structure
            
             The DbSortExpression that is being visited. 
        
        
            
            
            
             The DbTreatExpression that is being visited. 
        
        
            
            
            
             The DbUnionAllExpression that is being visited. 
        
        
            
            Returns false
            
             The DbVariableReferenceExpression that is being visited. 
             false 
        
        
            
            Used for 
            
        
        
            
            Rewrites an expression tree to make it suitable for translation to SQL appropriate for SQL Server 2000
            In particular, it replaces expressions that are not directly supported on SQL Server 2000
            with alternative translations. The following expressions are translated:
                - 
                    
                
- 
                    
                
- 
                    
                
The other expressions are copied unmodified.
            The new expression belongs to a new query command tree.
            
        
        
            
            The only entry point.
            Rewrites the given tree by replacing expressions that are not directly supported on SQL Server 2000
            with alterntive translations.
            
             The tree to rewrite 
             The new tree 
        
        
            
            Private Constructor.
            
        
        
            
            
            
        
        
            
            
            
        
        
            
            
            Logicaly,  translates to:
            SELECT Y.x1, Y.x2, ..., Y.xn
            FROM (
            SELECT X.x1, X.x2, ..., X.xn,
            FROM input AS X
            EXCEPT
            SELECT TOP(count) Z.x1, Z.x2, ..., Z.xn
            FROM input AS Z
            ORDER BY sk1, sk2, ...
            ) AS Y
            ORDER BY sk1, sk2, ...
            Here, input refers to the input of the , and count to the count property of the
            
            .
            The implementation of EXCEPT is non-duplicate eliminating, and does equality comparison only over the
            equality comparable columns of the input.
            This corresponds to the following expression tree:
            SORT
            |
            NON-DISTINCT EXCEPT  (specially translated,
            |
            | - Left:  clone of input
            | - Right:
            |
            Limit
            |
            | - Limit: Count
            | - Input
            |
            Sort
            |
            input
            
        
        
            
            This method is invoked when tranforming  and  by doing comparison over all input columns.
            
            
        
        
            
            This method is used for translating  and ,
            and for translating the "Except" part of .
            into the follwoing expression:
            A INTERSECT B, A EXCEPT B
            (DISTINCT)
            |
            FILTER
            |
            | - Input: A
            | - Predicate:(NOT)
            |
            ANY
            |
            | - Input: B
            | - Predicate:  (B.b1 = A.a1 or (B.b1 is null and A.a1 is null))
            AND (B.b2 = A.a2 or (B.b2 is null and A.a2 is null))
            AND ...
            AND (B.bn = A.an or (B.bn is null and A.an is null)))
            Here, A corresponds to right and B to left.
            (NOT) is present when transforming Except
            for the purpose of translating  or .
            (DISTINCT) is present when transforming for the purpose of translating
             or .
            For , the input to ANY is caped with project which projects out only
            the columns represented in the sortExpressionsOverLeft list and only these are used in the predicate.
            This is because we want to support skip over input with non-equal comarable columns and we have no way to recognize these.
            
             
             
             
             note that this list gets destroyed by this method 
             
        
        
            
            Adds the flattened properties on the input to the flattenedProperties list.
            
        
        
            
            Helper method for
            
            Removes all pairs of property expressions from list1 and list2, for which the property expression in list1
            does not have a 'matching' property expression in list2.
            The lists list1 and list2 are known to not create duplicate, and the purpose of the sortList is just for this method.
            Thus, to optimize the match process, we remove the seen property expressions from the sort list in
            
            when iterating both list simultaneously.
            
        
        
            
            Helper method for 
            Checks whether expr has a 'match' in the given list of property expressions.
            If it does, the matching expression is removed form the list, to speed up future matching.
            
        
        
            
            Determines whether two expressions match.
            They match if they are  of the shape
            expr1 -> DbPropertyExpression(... (DbPropertyExpression(DbVariableReferenceExpression(expr1BindingVariableName), nameX), ..., name1)
            expr1 -> DbPropertyExpression(... (DbPropertyExpression(DbVariableReferenceExpression(expr2BindingVariableName), nameX), ..., name1),
            i.e. if they only differ in the name of the binding.
            
        
        
            
            Helper method for
            
            Creates a
            
            over the given inputBinding that projects out the given flattenedProperties.
            and updates the flattenedProperties to be over the newly created project.
            
            
            An  over the newly created 
            
        
        
            
            This class is like StringBuilder.  While traversing the tree for the first time,
            we do not know all the strings that need to be appended e.g. things that need to be
            renamed, nested select statements etc.  So, we use a builder that can collect
            all kinds of sql fragments.
            
        
        
            
            Add an object to the list - we do not verify that it is a proper sql fragment
            since this is an internal method.
            
        
        
            
            This is to pretty print the SQL.  The writer 
            needs to know about new lines so that it can add the right amount of
            indentation at the beginning of lines.
            
        
        
            
            We delegate the writing of the fragment to the appropriate type.
            
        
        
            
            Whether the builder is empty.  This is used by the 
            to determine whether a sql statement can be reused.
            
        
        
            
            Enacapsulates the logic required to translate function calls represented as instances of DbFunctionExpression into SQL.
            There are several special cases that modify how the translation should proceed. These include:
            - 'Special' canonical functions, for which the function name or arguments differ between the EDM canonical function and the SQL function
            - 'Special' server functions, which are similar to the 'special' canonical functions but sourced by the SQL Server provider manifest
            - Niladic functions, which require the parentheses that would usually follow the function name to be omitted
            - Spatial canonical functions, which must translate to a static method call, instance method call, or instance property access against
            one of the built-in spatial CLR UDTs (geography/geometry).
            
        
        
            
            All special store functions and their handlers
            
        
        
            
            All special non-aggregate canonical functions and their handlers
            
        
        
            
            Initalizes the mapping from functions to TSql operators
            for all functions that translate to TSql operators
            
        
        
            
            Initalizes the mapping from names of canonical function for date/time addition
            to corresponding dateparts
            
        
        
            
            Initalizes the mapping from names of canonical function for date/time difference
            to corresponding dateparts
            
        
        
            
            Initalizes the mapping from names of canonical function that represent static geography methods to their corresponding
            static method name, qualified with the 'geography::' prefix.
            
        
        
            
            Initalizes the mapping from names of canonical function that represent geography instance properties to their corresponding
            store property name.
            
        
        
            
            Initalizes the mapping of canonical function name to instance method name for geography instance functions that differ in name from the sql server equivalent.
            
        
        
            
            Initalizes the mapping from names of canonical function that represent static geometry methods to their corresponding
            static method name, qualified with the 'geometry::' prefix.
            
        
        
            
            Initalizes the mapping from names of canonical function that represent geometry instance properties to their corresponding
            store property name.
            
        
        
            
            Initalizes the mapping of canonical function name to instance method name for geometry instance functions that differ in name from the sql server equivalent.
            
        
        
            
            Determines whether the given function is a store function that
            requires special handling
            
        
        
            
            Determines whether the given function is a canonical function that
            requires special handling
            
        
        
            
            Determines whether the given function is a canonical function the translates
            to a spatial (geography/geometry) property access or method call.
            
        
        
            
            Default handling for functions.
            Translates them to FunctionName(arg1, arg2, ..., argn)
            
        
        
            
            Default handling for functions with a given name.
            Translates them to FunctionName(arg1, arg2, ..., argn)
            
        
        
            
            Default handling for functions with a given name and given return value cast.
            Translates them to CAST(FunctionName(arg1, arg2, ..., argn) AS returnType)
            
        
        
            
            Default handling on function arguments.
            Appends the list of arguments to the given result
            If the function is niladic it does not append anything,
            otherwise it appends (arg1, arg2, .., argn)
            
        
        
            
            Handler for functions that need to be translated to different store function based on version
            
        
        
            
            Handler for special build in functions
            
        
        
            
            Handler for special canonical functions
            
        
        
            
            Dispatches the special function processing to the appropriate handler
            
        
        
            
            Handles functions that are translated into TSQL operators.
            The given function should have one or two arguments.
            Functions with one arguemnt are translated into
            op arg
            Functions with two arguments are translated into
            arg0 op arg1
            Also, the arguments can be optionaly enclosed in parethesis
            
             
             
             Whether the arguments should be enclosed in parethesis 
        
        
            
            
            
        
        
            
            
            
        
        
            
            Handles special case in which datapart 'type' parameter is present. all the functions
            handles here have *only* the 1st parameter as datepart. datepart value is passed along
            the QP as string and has to be expanded as TSQL keyword.
            
        
        
            
            Handler for canonical functions for extracting date parts.
            For example:
            Year(date) -> DATEPART( year, date)
            
        
        
            
            Handler for canonical funcitons for GetTotalOffsetMinutes.
            GetTotalOffsetMinutes(e) --> Datepart(tzoffset, e)
            
        
        
            
            Handler for turning a canonical function into DATEPART
            Results in DATEPART(datepart, e)
            
        
        
            
            Handler for the canonical function CurrentDateTime
            For Sql8 and Sql9:  CurrentDateTime() -> GetDate()
            For Sql10:          CurrentDateTime() -> SysDateTime()
            
        
        
            
            Handler for the canonical function CurrentUtcDateTime
            For Sql8 and Sql9:  CurrentUtcDateTime() -> GetUtcDate()
            For Sql10:          CurrentUtcDateTime() -> SysUtcDateTime()
            
        
        
            
            Handler for the canonical function CurrentDateTimeOffset
            For Sql8 and Sql9:  throw
            For Sql10: CurrentDateTimeOffset() -> SysDateTimeOffset()
            
        
        
            
            See  for exact translation
            Pre Katmai creates datetime.
            On Katmai creates datetime2.
            
        
        
            
            See  for exact translation
            Pre Katmai not supported.
            On Katmai creates datetimeoffset.
            
        
        
            
            See  for exact translation
            Pre Katmai not supported.
            On Katmai creates time.
            
        
        
            
            Helper for all date and time types creating functions.
            The given expression is in general trainslated into:
            CONVERT(@typename, [datePart] + [timePart] + [timeZonePart], 121), where the datePart and the timeZonePart are optional
            The individual parts are translated as:
            Date part:
            convert(varchar(255), @year) + '-' + convert(varchar(255), @month) + '-' + convert(varchar(255), @day)
            Time part:
            PRE KATMAI:  convert(varchar(255), @hour)+ ':' + convert(varchar(255), @minute)+ ':' + str(@second, 6, 3)
            KATMAI:  convert(varchar(255), @hour)+ ':' + convert(varchar(255), @minute)+ ':' + str(@second, 10, 7)
            Time zone part:
            (case when @tzoffset >= 0 then '+' else '-' end) + convert(varchar(255), ABS(@tzoffset)/60) + ':' + convert(varchar(255), ABS(@tzoffset)%60)
            
        
        
            
            Helper method that wrapps the given expession with a conver to varchar(255)
            
        
        
            
            TruncateTime(DateTime X)
            PreKatmai:    TRUNCATETIME(X) => CONVERT(DATETIME, CONVERT(VARCHAR(255), expression, 102),  102)
            Katmai:    TRUNCATETIME(X) => CONVERT(DATETIME2, CONVERT(VARCHAR(255), expression, 102),  102)
            TruncateTime(DateTimeOffset X)
            TRUNCATETIME(X) => CONVERT(datetimeoffset, CONVERT(VARCHAR(255), expression,  102)
            + ' 00:00:00 ' +  Right(convert(varchar(255), @arg, 121), 6),  102)
            
        
        
            
            Handler for date addition functions supported only starting from Katmai
            
        
        
            
            Handler for all date/time addition canonical functions.
            Translation, e.g.
            AddYears(datetime, number) =>  DATEADD(year, number, datetime)
            
        
        
            
            Hanndler for date differencing functions supported only starting from Katmai
            
        
        
            
            Handler for all date/time addition canonical functions.
            Translation, e.g.
            DiffYears(datetime, number) =>  DATEDIFF(year, number, datetime)
            
        
        
            
            Function rename IndexOf -> CHARINDEX
            
        
        
            
            Function rename NewGuid -> NEWID
            
        
        
            
            Function rename Length -> LEN
            
        
        
            
            Round(numericExpression) -> Round(numericExpression, 0);
            Round(numericExpression, digits) -> Round(numericExpression, digits);
            
        
        
            
            Truncate(numericExpression) -> Round(numericExpression, 0, 1); (does not exist as canonical function yet)
            Truncate(numericExpression, digits) -> Round(numericExpression, digits, 1);
            
        
        
            
            Common handler for the canonical functions ROUND and TRUNCATE
            
        
        
            
            Handle the canonical function Abs().
            
        
        
            
            TRIM(string) -> LTRIM(RTRIM(string))
            
        
        
            
            Function rename ToLower -> LOWER
            
        
        
            
            Function rename ToUpper -> UPPER
            
        
        
            
            Function to translate the StartsWith, EndsWith and Contains canonical functions to LIKE expression in T-SQL
            and also add the trailing ESCAPE '~' when escaping of the search string for the LIKE expression has occurred
            
        
        
            
            Handler for Contains. Wraps the normal translation with a case statement
            
        
        
            
            CONTAINS(arg0, arg1) => arg0 LIKE '%arg1%'
            
        
        
            
            Handler for StartsWith. Wraps the normal translation with a case statement
            
        
        
            
            STARTSWITH(arg0, arg1) => arg0 LIKE 'arg1%'
            
        
        
            
            Handler for EndsWith. Wraps the normal translation with a case statement
            
        
        
            
            ENDSWITH(arg0, arg1) => arg0 LIKE '%arg1'
            
        
        
            
            Turns a predicate into a statement returning a bit
            PREDICATE => CASE WHEN (PREDICATE) THEN CAST(1 AS BIT) WHEN (NOT (PREDICATE)) CAST (O AS BIT) END
            The predicate is produced by the given predicateTranslator.
            
        
        
            
            Writes the function name to the given SqlBuilder.
            
        
        
            
            Is this a Store function (ie) does it have the builtinAttribute specified and it is not a canonical function?
            
        
        
            
            determines if the function requires the return type be enforeced by use of a cast expression
            
        
        
            
            determines if the function requires the return type be enforeced by use of a cast expression
            
        
        
            
            determines if the function requires the return type be enforeced by use of a cast expression
            
        
        
            
            determines if the function requires the return type be enforeced by use of a cast expression
            
        
        
            
            Determines if the function requires the return type be enforced by use of a cast expression
            
        
        
            
            Translates the command object into a SQL string that can be executed on
            SQL Server 2000 and SQL Server 2005.
            
            
            The translation is implemented as a visitor 
            over the query tree.  It makes a single pass over the tree, collecting the sql
            fragments for the various nodes in the tree .
            The major operations are
                - 
                    Select statement minimization.  Multiple nodes in the query tree
                    that can be part of a single SQL select statement are merged. e.g. a
                    Filter node that is the input of a Project node can typically share the
                    same SQL statement.
                
- 
                    Alpha-renaming.  As a result of the statement minimization above, there
                    could be name collisions when using correlated subqueries
                    
                        Filter(
                            b = Project( c.x
                            c = Extent(foo)
                            )
                            exists (
                            Filter(
                            c = Extent(foo)
                            b.x = c.x
                            )
                            )
                            )The first Filter, Project and Extent will share the same SQL select statement.
                        The alias for the Project i.e. b, will be replaced with c.
                        If the alias c for the Filter within the exists clause is not renamed,
                        we will get c.x = c.x, which is incorrect.
                        Instead, the alias c within the second filter should be renamed to c1, to give
                        c.x = c1.x i.e. b is renamed to c, and c is renamed to c1.
- 
                    Join flattening.  In the query tree, a list of join nodes is typically
                    represented as a tree of Join nodes, each with 2 children. e.g.
                    
                        a = Join(InnerJoin
                            b = Join(CrossJoin
                            c = Extent(foo)
                            d = Extent(foo)
                            )
                            e = Extent(foo)
                            on b.c.x = e.x
                            )If translated directly, this will be translated toFROM ( SELECT c.*, d.*
                            FROM foo as c
                            CROSS JOIN foo as d) as b
                            INNER JOIN foo as e on b.x' = e.xIt would be better to translate this asFROM foo as c
                            CROSS JOIN foo as d
                            INNER JOIN foo as e on c.x = e.xThis allows the optimizer to choose an appropriate join ordering for evaluation.
- 
                    Select * and column renaming.  In the example above, we noticed that
                    in some cases we add
                    SELECT * FROM ...
                    to complete the SQL
                    statement. i.e. there is no explicit PROJECT list.
                    In this case, we enumerate all the columns available in the FROM clause
                    This is particularly problematic in the case of Join trees, since the columns
                    from the extents joined might have the same name - this is illegal.  To solve
                    this problem, we will have to rename columns if they are part of a SELECT *
                    for a JOIN node - we do not need renaming in any other situation.
                    
                    .
                
Renaming issues. When rows or columns are renamed, we produce names that are unique globally with respect to the query. The names are derived from the original names, with an integer as a suffix. e.g. CustomerId will be renamed to CustomerId1, CustomerId2 etc. Since the names generated are globally unique, they will not conflict when the columns of a JOIN SELECT statement are joined with another JOIN. 
            
                Record flattening. SQL server does not have the concept of records. However, a join statement produces records. We have to flatten the record accesses into a simple alias.column form.
                
            
            
                Building the SQL. There are 2 phases
                    - 
                        Traverse the tree, producing a sql builder
                        
                    
- 
                        Write the SqlBuilder into a string, renaming the aliases and columns
                        as needed.
                    
In the first phase, we traverse the tree. We cannot generate the SQL string right away, since
                    - The WHERE clause has to be visited before the from clause.
- 
                        extent aliases and column aliases need to be renamed.  To minimize
                        renaming collisions, all the names used must be known, before any renaming
                        choice is made.
                    
To defer the renaming choices, we use symbols
                
                . These are renamed in the second phase. Since visitor methods cannot transfer information to child nodes through parameters, we use some global stacks,
                    - 
                        A stack for the current SQL select statement.  This is needed by
                        
                        to create a
                        list of free variables used by a select statement.  This is needed for
                        alias renaming.
                    
- 
                        A stack for the join context.  When visiting an extent,
                        we need to know whether we are inside a join or not.  If we are inside
                        a join, we do not create a new SELECT statement.
                    
Global state. To enable renaming, we maintain
                    - The set of all extent aliases used.
- The set of all parameter names.
- The set of all column names that may need to be renamed.
Finally, we have a symbol table to lookup variable references. All references to the same extent have the same symbol.
            
            
                Sql select statement sharing. Each of the relational operator nodes
                    - Project
- Filter
- GroupBy
- Sort/OrderBy
can add its non-input (e.g. project, predicate, sort order etc.) to the SQL statement for the input, or create a new SQL statement. If it chooses to reuse the input's SQL statement, we play the following symbol table trick to accomplish renaming. The symbol table entry for the alias of the current node points to the symbol for the input in the input's SQL statement.Project(b.x
                        b = Filter(
                        c = Extent(foo)
                        c.x = 5)
                        )
                    The Extent node creates a new SqlSelectStatement.  This is added to the
                    symbol table by the Filter as {c, Symbol(c)}.  Thus, c.x is resolved to
                    Symbol(c).x.
                    Looking at the project node, we add {b, Symbol(c)} to the symbol table if the
                    SQL statement is reused, and {b, Symbol(b)}, if there is no reuse.
                    Thus, b.x is resolved to Symbol(c).x if there is reuse, and to
                    Symbol(b).x if there is no reuse.
                
            
            
        
        
            
            Every relational node has to pass its SELECT statement to its children
            This allows them (DbVariableReferenceExpression eventually) to update the list of
            outer extents (free variables) used by this select statement.
            
        
        
            
            Nested joins and extents need to know whether they should create
            a new Select statement, or reuse the parent's.  This flag
            indicates whether the parent is a join or not.
            
        
        
            
            VariableReferenceExpressions are allowed only as children of DbPropertyExpression
            or MethodExpression.  The cheapest way to ensure this is to set the following
            property in DbVariableReferenceExpression and reset it in the allowed parent expressions.
            
        
        
            
            Maintain the list of (string) DbParameterReferenceExpressions that should be compensated, viz.
            forced to non-unicode format. A parameter is added to the list if it is being compared to a
            non-unicode store column and none of its other usages in the query tree, disqualify it
            (For example - if the parameter is also being projected or compared to a unicode column)
            The goal of the compensation is to have the store index picked up by the server.
            String constants are also compensated and the decision is local, unlike parameters.
            
        
        
            
            Set and reset in DbComparisonExpression and DbLikeExpression visit methods. Maintains
            global state information that the children of these nodes are candidates for compensation.
            
        
        
            
            Set when it is is safe to ignore the unicode/non-unicode aspect. See  for an example.
            
        
        
            
            The current SQL Server version
            
        
        
            
            Basic constructor.
            
             server version 
        
        
            
            General purpose static function that can be called from System.Data assembly
            
             command tree 
             Server version 
             Parameters to add to the command tree corresponding to constants in the command tree. Used only in ModificationCommandTrees. 
             CommandType for generated command. 
             
             The string representing the SQL to be executed. \
        
        
            
            Translate a command tree to a SQL string.
            The input tree could be translated to either a SQL SELECT statement
            or a SELECT expression.  This choice is made based on the return type
            of the expression
            CollectionType => select statement
            non collection type => select expression
            
             The string representing the SQL to be executed. 
        
        
            
            Convert the SQL fragments to a string. Writes a string representing the SQL to be executed
            into the specified writer.
            
             
            The fragment to be emitted
            The writer specified for fluent continuations. 
        
        
            
            Translate(left) AND Translate(right)
            
            
            A  .
            
        
        
            
            An apply is just like a join, so it shares the common join processing
            in 
            
            
            A  .
            
        
        
            
            For binary expressions, we delegate to .
            We handle the other expressions directly.
            
            
            A 
            
        
        
            
            If the ELSE clause is null, we do not write it out.
            
            
            A 
            
        
        
            
            The parser generates Not(Equals(...)) for <>.
            
            
            A  .
            
        
        
            
            Checks if the arguments of the input Comparison or Like expression are candidates
            for compensation. If yes, sets global state variable - _forceNonUnicode.
            
             DBComparisonExpression or DbLikeExpression 
        
        
            
            The grammar for the pattern that we are looking for is -
            Pattern := Target OP Source | Source OP Target
            OP := Like | In | Comparison
            Source := Non-unicode DbPropertyExpression
            Target := Target FUNC Target | DbConstantExpression | DBParameterExpression
            FUNC := CONCAT | RTRIM | LTRIM | TRIM | SUBSTRING | TOLOWER | TOUPPER | REVERSE | REPLACE
            
        
        
            
            Matches the non-terminal symbol "target" in above grammar.
            
        
        
            
            Determines if the expression represents a non-unicode string column(char/varchar store type)
            
        
        
            
            Determines if the expression represents a string constant or parameter with the facet, unicode=null.
            
        
        
            
            Generate tsql for a constant. Avoid the explicit cast (if possible) when
            the isCastOptional parameter is set
            
             the constant expression 
             can we avoid the CAST 
             the tsql fragment 
        
        
            
            Helper method for 
            
             A double value 
            
            If a value of positive or negative infinity, or
            
            is specified
            
        
        
            
            Helper method for 
            
             A single value 
            
            If a value of positive or negative infinity, or
            
            is specified
            
        
        
            
            Helper function for 
            Appends the given constant value to the result either 'as is' or wrapped with a cast to the given type.
            
        
        
            
            We do not pass constants as parameters.
            
            
            A  . Strings are wrapped in single quotes and escaped. Numbers are written literally.
            
        
        
            
            The DISTINCT has to be added to the beginning of SqlSelectStatement.Select,
            but it might be too late for that.  So, we use a flag on SqlSelectStatement
            instead, and add the "DISTINCT" in the second phase.
            
            
            A 
            
        
        
            
            An element expression returns a scalar - so it is translated to
            ( Select ... )
            
        
        
            
            
            
        
        
            
            Only concrete expression types will be visited.
            
        
        
            
            If we are in a Join context, returns a  with the extent name, otherwise, a new
            
            with the From field set.
            
        
        
            
            Gets escaped TSql identifier describing this entity set.
            
        
        
            
            The bodies of , ,
            ,  are similar.
            Each does the following.
            
                - Visit the input expression
- 
                    Determine if the input's SQL statement can be reused, or a new
                    one must be created.
                
- Create a new symbol table scope
- 
                    Push the Sql statement onto a stack, so that children can
                    update the free variable list.
                
- Visit the non-input expression.
- Cleanup
A 
            
        
        
            
            Lambda functions are not supported.
            The functions supported are:
                - Canonical Functions - We recognize these by their dataspace, it is DataSpace.CSpace
- Store Functions - We recognize these by the BuiltInAttribute and not being Canonical
- User-defined Functions - All the rest
We handle Canonical and Store functions the same way: If they are in the list of functions
            that need special handling, we invoke the appropriate handler, otherwise we translate them to
            FunctionName(arg1, arg2, ..., argn).
            We translate user-defined functions to NamespaceName.FunctionName(arg1, arg2, ..., argn).
            
            
            A 
            
        
        
            
             for general details.
            We modify both the GroupBy and the Select fields of the SqlSelectStatement.
            GroupBy gets just the keys without aliases,
            and Select gets the keys and the aggregates with aliases.
            Sql Server does not support arbitrarily complex expressions inside aggregates,
            and requires keys to have reference to the input scope,
            so in some cases we create a nested query in which we alias the arguments to the aggregates.
            The exact limitations of Sql Server are:
                - 
                    If an expression being aggregated contains an outer reference, then that outer
                    reference must be the only column referenced in the expression (SQLBUDT #488741)
                
- 
                    Sql Server cannot perform an aggregate function on an expression containing
                    an aggregate or a subquery. (SQLBUDT #504600)
                
- 
                    Sql Server requries each GROUP BY expression (key) to contain at least one column
                    that is not an outer reference. (SQLBUDT #616523)
                
- 
                    Aggregates on the right side of an APPLY cannot reference columns from the left side.
                    (SQLBUDT #617683)
                
The default translation, without inner query is:
            SELECT
            kexp1 AS key1, kexp2 AS key2,... kexpn AS keyn,
            aggf1(aexpr1) AS agg1, .. aggfn(aexprn) AS aggn
            FROM input AS a
            GROUP BY kexp1, kexp2, .. kexpn
            When we inject an innner query, the equivalent translation is:
            SELECT
            key1 AS key1, key2 AS key2, .. keyn AS keys,
            aggf1(agg1) AS agg1, aggfn(aggn) AS aggn
            FROM (
            SELECT
            kexp1 AS key1, kexp2 AS key2,... kexpn AS keyn,
            aexpr1 AS agg1, .. aexprn AS aggn
            FROM input AS a
            ) as a
            GROUP BY key1, key2, keyn
            
            
            A 
            
        
        
            
            
            
        
        
            
            Not(IsEmpty) has to be handled specially, so we delegate to
            .
            
            
            A  .[NOT] EXISTS( ... )
            
        
        
            
            Not(IsNull) is handled specially, so we delegate to
            
            
            
            A  IS [NOT] NULL
            
        
        
            
            No error is raised if the store cannot support this.
            
            
            A 
            
        
        
            
            
            
            
            A  .
            
        
        
            
            
            
            
            A  .
            
        
        
            
            A 
            
        
        
            
            Translates to TOP expression. For Sql8, limit can only be a constant expression
            
            
            A 
            
        
        
            
            DbNewInstanceExpression is allowed as a child of DbProjectExpression only.
            If anyone else is the parent, we throw.
            We also perform special casing for collections - where we could convert
            them into Unions
             for the actual implementation.
            
        
        
            
            The Not expression may cause the translation of its child to change.
            These children are
            
                - 
                    
                    NOT(Not(x)) becomes x
                
- 
                    
                    NOT EXISTS becomes EXISTS
                
- 
                    
                    IS NULL becomes IS NOT NULL
                
- 
                    
                    = becomes <>
                
A 
            
        
        
            
            
            
        
        
            
            A 
            
        
        
            
            Visit a DbOrExpression and consider the subexpressions
            for whether to generate OR conditions or an IN clause.
            
             DbOrExpression to be visited 
            
            A  fragment of SQL generated
            
            
        
        
            
            Visits a DbInExpression and generates the corresponding SQL fragment.
            
            
            A  that specifies the expression to be visited.
            
            
            A  that specifies the generated SQL fragment.
            
        
        
            
            Determine if a DbOrExpression can be optimized into one or more IN clauses
            and generate an ISqlFragment if it is possible.
            
             DbOrExpression to attempt translation upon 
             Fragment of SQL generated 
             True if an IN clause is possible and sqlFragment has been generated, false otherwise 
        
        
            
            Determines if a DbExpression is a valid key for the purposes of generating an In clause optimization.
            
             DbExpression to consider 
             True if the expression can be used as a key, false otherwise 
        
        
            
            Looks at both sides of a DbBinaryExpression to consider if either side is a valid candidate to
            be a key and if so adds it to the KeyToListMap as a key with the other side as the value.
            
             DbBinaryExpression to consider 
             KeyToListMap to add the sides of the binary expression to 
             True if the expression was added, false otherwise 
        
        
            
            Attempts to build a KeyToListMap containing valid references and the appropriate value equality
            tests associated with each so that they can be optimized into IN clauses. Calls itself recursively
            to consider additional OR branches.
            
             DbExpression representing the branch to evaluate 
             KeyToListMap to which to add references and value equality tests encountered 
             True if this branch contained just equality tests or further OR branches, false otherwise 
        
        
            
            This method handles the DBParameterReference expressions. If the parameter is in
            a part of the tree, which matches our criteria for forcing to non-unicode, then
            we add it to the list of candidate parameters. If the parameter occurs in a different
            usage scenario, then disqualify it from being forced to non-unicode.
            
            
            A 
            
        
        
            
             for the general ideas.
            
            
            A 
            
            
        
        
            
            This method handles record flattening, which works as follows.
            consider an expression Prop(y, Prop(x, Prop(d, Prop(c, Prop(b, Var(a)))))
            where a,b,c are joins, d is an extent and x and y are fields.
            b has been flattened into a, and has its own SELECT statement.
            c has been flattened into b.
            d has been flattened into c.
            We visit the instance, so we reach Var(a) first.  This gives us a (join)symbol.
            Symbol(a).b gives us a join symbol, with a SELECT statement i.e. Symbol(b).
            From this point on , we need to remember Symbol(b) as the source alias,
            and then try to find the column.  So, we use a SymbolPair.
            We have reached the end when the symbol no longer points to a join symbol.
            
            
            A  if we have not reached the first Join node that has a SELECT statement. A
            
            if we have seen the JoinNode, and it has a SELECT statement. A  with {Input}.propertyName otherwise.
            
        
        
            
            Any(input, x) => Exists(Filter(input,x))
            All(input, x) => Not Exists(Filter(input, not(x))
            
        
        
            
            For Sql9 it translates to:
            SELECT Y.x1, Y.x2, ..., Y.xn
            FROM (
            SELECT X.x1, X.x2, ..., X.xn, row_number() OVER (ORDER BY sk1, sk2, ...) AS [row_number]
            FROM input as X
            ) as Y
            WHERE Y.[row_number] > count
            ORDER BY sk1, sk2, ...
            
            
            A 
            
        
        
            
            
            
            
            A 
            
            
        
        
            
            A 
            
        
        
            
            This code is shared by 
            and 
            
            Since the left and right expression may not be Sql select statements,
            we must wrap them up to look like SQL select statements.
            
        
        
            
            This method determines whether an extent from an outer scope(free variable)
            is used in the CurrentSelectStatement.
            An extent in an outer scope, if its symbol is not in the FromExtents
            of the CurrentSelectStatement.
            
            
            A  .
            
        
        
            
            Aggregates are not visited by the normal visitor walk.
            
             The aggregate go be translated 
             The translated aggregate argument 
        
        
            
            Dump out an expression - optionally wrap it with parantheses if possible
            
        
        
            
            Handler for inline binary expressions.
            Produces left op right.
            For associative operations does flattening.
            Puts parenthesis around the arguments if needed.
            
        
        
            
            Creates a flat list of the associative arguments.
            For example, for ((A1 + (A2 - A3)) + A4) it will create A1, (A2 - A3), A4
            Only 'unfolds' the given arguments that are of the given expression kind.
            
        
        
            
            Helper method for FlattenAssociativeExpression.
            Creates a flat list of the associative arguments and appends to the given argument list.
            For example, for ((A1 + (A2 - A3)) + A4) it will add A1, (A2 - A3), A4 to the list.
            Only 'unfolds' the given expression if it is of the given expression kind.
            
        
        
            
            Private handler for comparison expressions - almost identical to VisitBinaryExpression.
            We special case constants, so that we don't emit unnecessary casts
            
             the comparison op 
             the left-side expression 
             the right-side expression 
        
        
            
            This is called by the relational nodes.  It does the following
                - 
                    If the input is not a SqlSelectStatement, it assumes that the input
                    is a collection expression, and creates a new SqlSelectStatement
                
A  and the main fromSymbol for this select statement.
            
        
        
            
            
            
             
             Was the parent a DbNotExpression? 
        
        
            
            Translate a NewInstance(Element(X)) expression into
            "select top(1) * from X"
            
        
        
            
            
            
             
             Was the parent a DbNotExpression? 
        
        
            
            This handles the processing of join expressions.
            The extents on a left spine are flattened, while joins
            not on the left spine give rise to new nested sub queries.
            Joins work differently from the rest of the visiting, in that
            the parent (i.e. the join node) creates the SqlSelectStatement
            for the children to use.
            The "parameter" IsInJoinContext indicates whether a child extent should
            add its stuff to the existing SqlSelectStatement, or create a new SqlSelectStatement
            By passing true, we ask the children to add themselves to the parent join,
            by passing false, we ask the children to create new Select statements for
            themselves.
            This method is called from  and
            .
            
            
            A 
            
        
        
            
            This is called from .
            This is responsible for maintaining the symbol table after visiting
            a child of a join expression.
            The child's sql statement may need to be completed.
            The child's result could be one of
                - The same as the parent's - this is treated specially.
- A sql select statement, which may need to be completed
- An extent - just copy it to the from clause
- 
                    Anything else (from a collection-valued expression) -
                    unnest and copy it.
                
If the input was a Join, we need to create a new join symbol,
            otherwise, we create a normal symbol.
            We then call AddFromSymbol to add the AS clause, and update the symbol table.
            If the child's result was the same as the parent's, we have to clean up
            the list of symbols in the FromExtents list, since this contains symbols from
            the children of both the parent and the child.
            The happens when the child visited is a Join, and is the leftmost child of
            the parent.
            
        
        
            
            We assume that this is only called as a child of a Project.
            This replaces , since
            we do not allow DbNewInstanceExpression as a child of any node other than
            DbProjectExpression.
            We write out the translation of each of the columns in the record.
            
            
            A 
            
        
        
            
            Handler for set operations
            It generates left separator right.
            Only for SQL 8.0 it may need to create a new select statement
            above the set operation if the left child's output columns got renamed
            
        
        
            
            
            Add the column names from the referenced extent/join to the
            select statement.
            If the symbol is a JoinSymbol, we recursively visit all the extents,
            halting at real extents and JoinSymbols that have an associated SqlSelectStatement.
            The column names for a real extent can be derived from its type.
            The column names for a Join Select statement can be got from the
            list of columns that was created when the Join's select statement
            was created.
            We do the following for each column.
                - Add the SQL string for each column to the SELECT clause
- 
                    Add the column to the list of columns - so that it can
                    become part of the "type" of a JoinSymbol
                
- 
                    Check if the column name collides with a previous column added
                    to the same select statement.  Flag both the columns for renaming if true.
                
- Add the column to a name lookup dictionary for collision detection.
The select statement that started off as SELECT * 
             The symbol containing the type information for the columns to be added. 
            
            Columns that have been added to the Select statement. This is created in
            
            .
            
             A dictionary of the columns above. 
        
        
            
            Creates an optional column and registers the corresponding symbol with
            the optionalColumnUsageManager it has not already been registered.
            
        
        
            
            Helper method for AddColumns. Adds a column with the given column name
            to the Select list of the given select statement.
            
             The select statement to whose SELECT part the column should be added 
             The symbol from which the column to be added originated 
            
            Columns that have been added to the Select statement. This is created in
            
            .
            
             A dictionary of the columns above. 
             The name of the column to be added. 
        
        
            
            Expands Select * to "select the_list_of_columns"
            If the columns are taken from an extent, they are written as
            {original_column_name AS Symbol(original_column)} to allow renaming.
            If the columns are taken from a Join, they are written as just
            {original_column_name}, since there cannot be a name collision.
            We concatenate the columns from each of the inputs to the select statement.
            Since the inputs may be joins that are flattened, we need to recurse.
            The inputs are inferred from the symbols in FromExtents.
            
        
        
            
            
            
        
        
            
            This method is called after the input to a relational node is visited.
             and 
            There are 2 scenarios
                - 
                    The fromSymbol is new i.e. the select statement has just been
                    created, or a join extent has been added.
                
- The fromSymbol is old i.e. we are reusing a select statement.
If we are not reusing the select statement, we have to complete the
            FROM clause with the alias-- if the input was an extent
                FROM = [SchemaName].[TableName]
                -- if the input was a Project
                FROM = (SELECT ... FROM ... WHERE ...)
            These become
            -- if the input was an extent
                FROM = [SchemaName].[TableName] AS alias
                -- if the input was a Project
                FROM = (SELECT ... FROM ... WHERE ...) AS alias
            and look like valid FROM clauses.
            Finally, we have to add the alias to the global list of aliases used,
            and also to the current symbol table.
            
             
             The alias to be used. 
             
             
        
        
            
            Translates a list of SortClauses.
            Used in the translation of OrderBy
            
             The SqlBuilder to which the sort keys should be appended 
             
        
        
            
            
            
        
        
            
            This is called after a relational node's input has been visited, and the
            input's sql statement cannot be reused.  
            When the input's sql statement cannot be reused, we create a new sql
            statement, with the old one as the from clause of the new statement.
            The old statement must be completed i.e. if it has an empty select list,
            the list of columns must be projected out.
            If the old statement being completed has a join symbol as its from extent,
            the new statement must have a clone of the join symbol as its extent.
            We cannot reuse the old symbol, but the new select statement must behave
            as though it is working over the "join" record.
            
             A new select statement, with the old one as the from clause. 
        
        
            
            Before we embed a string literal in a SQL string, we should
            convert all ' to '', and enclose the whole string in single quotes.
            
             The escaped sql string. 
        
        
            
            Returns the sql primitive/native type name.
            It will include size, precision or scale depending on type information present in the
            type facets
            
        
        
            
            Handles the expression represending DbLimitExpression.Limit and DbSkipExpression.Count.
            If it is a constant expression, it simply does to string thus avoiding casting it to the specific value
            (which would be done if  is called)
            
        
        
            
            This is used to determine if a particular expression is an Apply operation.
            This is only the case when the DbExpressionKind is CrossApply or OuterApply.
            
        
        
            
            This is used to determine if a particular expression is a Join operation.
            This is true for DbCrossJoinExpression and DbJoinExpression, the
            latter of which may have one of several different ExpressionKinds.
            
        
        
            
            This is used to determine if a calling expression needs to place
            round brackets around the translation of the expression e.
            Constants, parameters and properties do not require brackets,
            everything else does.
            
             true, if the expression needs brackets 
        
        
            
            Determine if the owner expression can add its unique sql to the input's
            SqlSelectStatement
            
             The SqlSelectStatement of the input to the relational node. 
             The kind of the expression node(not the input's) 
        
        
            
            We use the normal box quotes for SQL server.  We do not deal with ANSI quotes
            i.e. double quotes.
            
        
        
            
            Simply calls 
            with addDefaultColumns set to true and markAllDefaultColumnsAsUsed set to false.
            
        
        
            
            This is called from 
            and nodes which require a select statement as an argument e.g. ,
            .
            SqlGenerator needs its child to have a proper alias if the child is
            just an extent or a join.
            The normal relational nodes result in complete valid SQL statements.
            For the rest, we need to treat them as there was a dummy
            -- originally {expression}
                                            -- change that to
                                            SELECT *
                                            FROM {expression} as c
            DbLimitExpression needs to start the statement but not add the default columns
            
        
        
            
            This method is called by  and
            
            
             
             
            
            This is passed from  in the All(...) case.
            
        
        
            
            If the sql fragment for an input expression is not a SqlSelect statement
            or other acceptable form (e.g. an extent as a SqlBuilder), we need
            to wrap it in a form acceptable in a FROM clause.  These are
            primarily the
            
                - The set operation expressions - union all, intersect, except
- TVFs, which are conceptually similar to tables
Helper method for the Group By visitor
            Returns true if at least one of the aggregates in the given list
            has an argument that is not a  and is not
            a  over ,
            either potentially capped with a 
            This is really due to the following two limitations of Sql Server:
                - 
                    If an expression being aggregated contains an outer reference, then that outer
                    reference must be the only column referenced in the expression (SQLBUDT #488741)
                
- 
                    Sql Server cannot perform an aggregate function on an expression containing
                    an aggregate or a subquery. (SQLBUDT #504600)
                
Potentially, we could furhter optimize this.
            
        
        
            
            Returns true if the given expression is not a  or a
             over  a 
            referencing the given inputVarRefName, either
            potentially capped with a .
            
        
        
            
            Helper method for the Group By visitor
            Returns true if at least one of the expressions in the given list
            is not  over 
            referencing the given inputVarRefName potentially capped with a .
            This is really due to the following limitation: Sql Server requires each GROUP BY expression
            (key) to contain at least one column that is not an outer reference. (SQLBUDT #616523)
            Potentially, we could further optimize this.
            
        
        
            
            Returns true if the given expression is not  over
             referencing the given inputVarRefName
            potentially capped with a .
            This is really due to the following limitation: Sql Server requires each GROUP BY expression
            (key) to contain at least one column that is not an outer reference. (SQLBUDT #616523)
            Potentially, we could further optimize this.
            
        
        
            
            Helper method for processing Group By keys and aggregates.
            Returns true if the given expression is not a 
            (and allowConstants is specified)or a  over
            a  referencing the given inputVarRefName,
            either potentially capped with a .
            
        
        
            
            Throws not supported exception if the server is pre-katmai
            
        
        
            
            Throws not supported exception if the server is pre-katmai
            
        
        
            
            The top of the stack
            
        
        
            
            Determine if the parent is a join.
            
        
        
            
            Required by the KeyToListMap to allow certain DbExpression subclasses to be used as a key
            which is not normally possible given their lack of Equals and GetHashCode implementations
            for testing object value equality.
            
        
        
            
            Compare two DbExpressions to see if they are equal for the purposes of
            our key management. We only support DbPropertyExpression, DbParameterReferenceExpression,
            VariableReferenceExpression and DbCastExpression types. Everything else will fail to
            be considered equal.
            
             First DbExpression to consider for equality 
             Second DbExpression to consider for equality 
             True if the types are allowed and equal, false otherwise 
        
        
            
            Calculates a hashcode for a given number of DbExpression subclasses to allow the KeyToListMap
            to efficiently and reliably locate existing keys.
            
             DbExpression to calculate a hashcode for 
             Integer containing the hashcode 
        
        
            
            This class is used for building the SELECT clause of a Sql Statement
            It is used to gather information about required and optional columns
            and whether TOP and DISTINCT should be specified.
            The underlying SqlBuilder is used for gathering the required columns.
            The list of OptionalColumns is used for gathering the optional columns.
            Whether a given OptionalColumn should be written is known only after the entire
            command tree has been processed.
            The IsDistinct property indicates that we want distinct columns.
            This is given out of band, since the input expression to the select clause
            may already have some columns projected out, and we use append-only SqlBuilders.
            The DISTINCT is inserted when we finally write the object into a string.
            Also, we have a Top property, which is non-null if the number of results should
            be limited to certain number. It is given out of band for the same reasons as DISTINCT.
            
        
        
            
            Writes the string representing the Select statement:
            SELECT (DISTINCT) (TOP topClause) (optionalColumns) (requiredColumns)
            If Distinct is specified or this is part of a top most statement
            all optional columns are marked as used.
            Optional columns are only written if marked as used.
            In addition, if no required columns are specified and no optional columns are
            marked as used, the first optional column is written.
            
        
        
            
            Writes the optional columns that are used.
            If this is the topmost statement or distict is specifed as part of the same statement
            all optoinal columns are written.
            
             Whether at least one column got written 
        
        
            
            Do we need to add a DISTINCT at the beginning of the SELECT
            
        
        
            
            Whether any columns have been specified.
            
        
        
            
            A SqlSelectStatement represents a canonical SQL SELECT statement.
            It has fields for the 5 main clauses
                - SELECT
- FROM
- WHERE
- GROUP BY
- ORDER BY
We do not have HAVING, since the CQT does not have such a node.
            Each of the fields is a SqlBuilder, so we can keep appending SQL strings
            or other fragments to build up the clause.
            The FromExtents contains the list of inputs in use for the select statement.
            There is usually just one element in this - Select statements for joins may
            temporarily have more than one.
            If the select statement is created by a Join node, we maintain a list of
            all the extents that have been flattened in the join in AllJoinExtents
            
                in J(j1= J(a,b), c)
                FromExtents has 2 nodes JoinSymbol(name=j1, ...) and Symbol(name=c)
                AllJoinExtents has 3 nodes Symbol(name=a), Symbol(name=b), Symbol(name=c)
            
            If any expression in the non-FROM clause refers to an extent in a higher scope,
            we add that extent to the OuterExtents list.  This list denotes the list
            of extent aliases that may collide with the aliases used in this select statement.
            It is set by .
            An extent is an outer extent if it is not one of the FromExtents.
            
        
        
            
            Write out a SQL select statement as a string.
            We have to
                - 
                    Check whether the aliases extents we use in this statement have
                    to be renamed.
                    We first create a list of all the aliases used by the outer extents.
                    For each of the FromExtents( or AllJoinExtents if it is non-null),
                    rename it if it collides with the previous list.
                
- Write each of the clauses (if it exists) as a string
Whether the columns ouput by this sql statement were renamed from what given in the command tree.
            
        
        
            
            A dictionary of output columns
            
        
        
            
            This extends IndentedTextWriter/StringWriter primarily to add the ability to add an indent
            to each line that is written out.
            
        
        
            
            The SymbolPair exists to solve the record flattening problem.
            
            Consider a property expression D(v, "j3.j2.j1.a.x")
            where v is a VarRef, j1, j2, j3 are joins, a is an extent and x is a columns.
            This has to be translated eventually into {j'}.{x'}
            The source field represents the outermost SqlStatement representing a join
            expression (say j2) - this is always a Join symbol.
            The column field keeps moving from one join symbol to the next, until it
            stops at a non-join symbol.
            This is returned by ,
            but never makes it into a SqlBuilder.
            
        
        
            
            The symbol table is quite primitive - it is a stack with a new entry for
            each scope.  Lookups search from the top of the stack to the bottom, until
            an entry is found.
            The symbols are of the following kinds
                - 
                    
                    represents tables (extents/nested selects/unnests)
                
- 
                    
                    represents Join nodes
                
- 
                    
                    columns.
                
Symbols represent names  to be resolved,
            or things to be renamed.
            
        
        
            
            Tracks the usage of symbols.
            When registering a symbol with the usage manager if an input symbol is specified,
            than the usage of the two is 'connected' - if one ever gets marked as used,
            the other one becomes 'used' too.
            
        
        
            
            TopClause represents the a TOP expression in a SqlSelectStatement.
            It has a count property, which indicates how many TOP rows should be selected and a
            boolen WithTies property.
            
        
        
            
            Creates a TopClause with the given topCount and withTies.
            
        
        
            
            Creates a TopClause with the given topCount and withTies.
            
        
        
            
            Write out the TOP part of sql select statement
            It basically writes TOP (X) [WITH TIES].
            The brackets around X are ommited for Sql8.
            
        
        
            
            Do we need to add a WITH_TIES to the top statement
            
        
        
            
            How many top rows should be selected.
            
        
        
            
            The Provider Manifest for SQL Server
            
        
        
            
            Maximum size of SQL Server unicode
            
        
        
            
            Initializes a new instance of the  class.
            
             A token used to infer the capabilities of the store. 
        
        
            
            Function to detect wildcard characters %, _, [ and ^ and escape them with a preceding ~
            This escaping is used when StartsWith, EndsWith and Contains canonical and CLR functions
            are translated to their equivalent LIKE expression
            NOTE: This code has been copied from LinqToSql
            
             Original input as specified by the user 
             escape the escape character ~ regardless whether wildcard characters were encountered 
             true if the escaping was performed, false if no escaping was required 
             The escaped string that can be used as pattern in a LIKE expression 
        
        
            
            Providers should override this to return information specific to their provider.
            This method should never return null.
            
             The name of the information to be retrieved. 
             An XmlReader at the begining of the information requested. 
        
        
            
            This method takes a type and a set of facets and returns the best mapped equivalent type
            in EDM.
            
             A TypeUsage encapsulating a store type and a set of facets 
             A TypeUsage encapsulating an EDM type and a set of facets 
        
        
            
            This method takes a type and a set of facets and returns the best mapped equivalent type
            in SQL Server, taking the store version into consideration.
            
             A TypeUsage encapsulating an EDM type and a set of facets 
             A TypeUsage encapsulating a store type and a set of facets 
        
        
            
            Returns true, SqlClient supports escaping strings to be used as arguments to like
            The escape character is '~'
            
             The character '~' 
             True 
        
        
            
            Escapes the wildcard characters and the escape character in the given argument.
            
             Equivalent to the argument, with the wildcard characters and the escape character escaped 
        
        
            
            Returns a boolean that specifies whether the corresponding provider can handle expression trees 
            containing instances of DbInExpression.
            The Sql provider handles instances of DbInExpression.
            
             true. 
        
        
            
            The DbProviderServices implementation for the SqlClient provider for SQL Server.
            
            
            Note that instance of this type also resolve additional provider services for Microsoft SQL Server
            when this type is registered as an EF provider either using an entry in the application's config file
            or through code-based registration in .
            The services resolved are:
            Requests for  are resolved to a Singleton instance of
             to create connections to SQL Express by default.
            Requests for  for the invariant name "System.Data.SqlClient"
            for any server name are resolved to a delegate that returns a 
            to provide a non-retrying policy for SQL Server.
            Requests for  for the invariant name "System.Data.SqlClient" are
            resolved to  instances to provide default Migrations SQL
            generation for SQL Server.
            Requests for  for the invariant name "System.Data.SqlClient" are
            resolved to a Singleton instance of  to provide default spatial
            services for SQL Server.
            
        
        
            
            This is the well-known string using in configuration files and code-based configuration as
            the "provider invariant name" used to specify Microsoft SQL Server for ADO.NET and
            Entity Framework provider services.
            
        
        
            
            Private constructor to ensure only Singleton instance is created.
            
        
        
            
            Singleton object
            
        
        
            
            Registers a handler to process non-error messages coming from the database provider.
            
             The connection to receive information for. 
             The handler to process messages. 
        
        
            
            Create a Command Definition object, given the connection and command tree
            
             provider manifest that was determined from metadata 
             command tree for the statement 
             an executable command definition object 
        
        
            
            Create a SqlCommand object, given the provider manifest and command tree
            
             provider manifest 
             command tree for the statement 
             a command object 
        
        
            
            Sets the parameter value and appropriate facets for the given .
            
            The parameter.
            The type of the parameter.
            The value of the parameter.
        
        
            
            Returns provider manifest token for a given connection.
            
             Connection to find manifest token from. 
             The provider manifest token for the specified connection. 
        
        
            
            Returns the provider manifest by using the specified version information.
            
             The token information associated with the provider manifest. 
             The provider manifest by using the specified version information. 
        
        
            
            Gets a spatial data reader for SQL Server.
            
             The reader where the spatial data came from. 
             The manifest token associated with the provider manifest. 
             The spatial data reader. 
        
        
            
            Gets a spatial data reader for SQL Server.
            
             The manifest token associated with the provider manifest. 
             The spatial data reader. 
        
        
            
            Creates a SqlParameter given a name, type, and direction
            
        
        
            
            Validates that the specified value is compatible with SqlParameter and if not, attempts to return an appropriate value that is.
            Currently only spatial values (DbGeography/DbGeometry) may not be directly usable with SqlParameter. For these types, an instance
            of the corresponding SQL Server CLR spatial UDT will be manufactured based on the spatial data contained in
            .
            If  is an instance of DbGeography/DbGeometry that was read from SQL Server by this provider, then the wrapped
            CLR UDT value is available via the ProviderValue property (see SqlSpatialServices for the full conversion process from instances of
            DbGeography/DbGeometry to instances of the CLR SqlGeography/SqlGeometry UDTs)
            
        
        
            
            Determines SqlDbType for the given primitive type. Extracts facet
            information as well.
            
        
        
            
            Determines preferred value for SqlParameter.Size. Returns null
            where there is no preference.
            
        
        
            
            Returns SqlParameter.Precision where the type facet exists. Otherwise,
            returns null or the maximum available precision to avoid truncation (which can occur
            for output parameters).
            
        
        
            
            Returns SqlParameter.Precision where the type facet exists. Otherwise,
            returns null.
            
        
        
            
            Returns SqlParameter.Scale where the type facet exists. Otherwise,
            returns null.
            
        
        
            
            Chooses the appropriate SqlDbType for the given string type.
            
        
        
            
            Chooses the appropriate SqlDbType for the given binary type.
            
        
        
            
            Generates a data definition language (DDL) script that creates schema objects 
            (tables, primary keys, foreign keys) based on the contents of the StoreItemCollection 
            parameter and targeted for the version of the database corresponding to the provider manifest token.
            
             The provider manifest token identifying the target version. 
             The structure of the database. 
            
            A DDL script that creates schema objects based on the contents of the StoreItemCollection parameter 
            and targeted for the version of the database corresponding to the provider manifest token.
            
        
        
            
            Create the database and the database objects.
            If initial catalog is not specified, but AttachDBFilename is specified, we generate a random database name based on the AttachDBFilename.
            Note: this causes pollution of the db, as when the connection string is later used, the mdf will get attached under a different name.
            However if we try to replicate the name under which it would be attached, the following scenario would fail:
            The file does not exist, but registered with database.
            The user calls:  If (DatabaseExists) DeleteDatabase
            CreateDatabase
            For further details on the behavior when AttachDBFilename is specified see Dev10# 188936
            
        
        
            
            Get the Ldf name given the Mdf full name
            
        
        
            
            Generates database name based on the given mdfFileName.
            The logic is replicated from System.Web.DataAccess.SqlConnectionHelper
            
        
        
            
            Get the full mdf file name given the attachDBFile value from the connection string
            
        
        
            
            Determines whether the database for the given connection exists.
            There are three cases:
            1.  Initial Catalog = X, AttachDBFilename = null:   (SELECT Count(*) FROM sys.databases WHERE [name]= X) > 0
            2.  Initial Catalog = X, AttachDBFilename = F:      if (SELECT Count(*) FROM sys.databases WHERE [name]= X) >  true,
            if not, try to open the connection and then return (SELECT Count(*) FROM sys.databases WHERE [name]= X) > 0
            3.  Initial Catalog = null, AttachDBFilename = F:   Try to open the connection. If that succeeds the result is true, otherwise
            if the there are no databases corresponding to the given file return false, otherwise throw.
            Note: We open the connection to cover the scenario when the mdf exists, but is not attached.
            Given that opening the connection would auto-attach it, it would not be appropriate to return false in this case.
            Also note that checking for the existence of the file does not work for a remote server.  (Dev11 #290487)
            For further details on the behavior when AttachDBFilename is specified see Dev10# 188936
            
        
        
            
            Delete the database for the given connection.
            There are three cases:
            1.  If Initial Catalog is specified (X) drop database X
            2.  Else if AttachDBFilename is specified (F) drop all the databases corresponding to F
            if none throw
            3.  If niether the catalog not the file name is specified - throw
            Note that directly deleting the files does not work for a remote server.  However, even for not attached
            databases the current logic would work assuming the user does: if (DatabaseExists) DeleteDatabase
            
             Connection 
             Timeout for internal commands. 
             Item Collection. 
        
        
            
            The Singleton instance of the SqlProviderServices type.
            
        
        
            
            Set this flag to false to prevent  values from being truncated to
            the scale (number of decimal places) defined for the column. The default value is true,
            indicating that decimal values will be truncated, in order to prevent breaking existing
            applications that depend on this behavior.
            
            
            With this flag set to true  objects are created with their Scale
            properties set. When this flag is set to false then the Scale properties are not set, meaning
            that the truncation behavior of SqlParameter is avoided.
            
        
        
            
            Requires that the given connection is of type  T.
            Returns the connection or throws.
            
        
        
            
            SqlClient specific implementation of 
            
        
        
            
        
        
            
        
        
            
        
        
            
        
        
            
            Builds and compiles the Expression equivalent of the following:
            (BinaryReader r) => { var result = new SpatialType(); result.Read(r); return r; }
            The construct/read pattern is preferred over casting the result of calling GetValue on the DataReader,
            because constructing the value directly allows client code to specify the type, rather than SqlClient using
            the server-specified assembly qualified type name from TDS to try to locate the correct type on the client.
            
        
        
            
        
        
            
            SqlTypesAssembly allows for late binding to the capabilities of a specific version of the Microsoft.SqlServer.Types assembly
            
        
        
            
            For testing.
            
        
        
            
            This enumeration describes the current SQL Server version.
            
        
        
            
            SQL Server 8 (2000).
            
        
        
            
            SQL Server 9 (2005).
            
        
        
            
            SQL Server 10 (2008).
            
        
        
            
            SQL Server 11 (2012).