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SQL to C: GUID

The identifier for the GUID ODBC SQL data type is:

SQL_GUID

The following table shows the ODBC C data types to which GUID SQL data may be converted. For an explanation of the columns and terms in the table, see Converting Data from SQL to C Data Types.

C type identifier Test *TargetValuePtr *StrLen_or_IndPtr SQLSTATE
SQL_C_CHAR BufferLength > Character byte length Data 36 n/a
BufferLength < 37 Undefined Undefined 22003
SQL_C_WCHAR BufferLength > Character length Data 36 n/a
BufferLength < 37 Undefined Undefined 22003
SQL_C_BINARY Byte length of data <= BufferLength Data Length of data in bytes n/a
Byte length of data > BufferLength Undefined Undefined 22003
SQL_C_GUID None[a] Data 16[b] n/a

[a] The value of BufferLength is ignored for this conversion. The driver assumes that the size of *TargetValuePtr is the size of the C data type.

[b] This is the size of the corresponding C data type.