C to SQL: Date

The identifier for the date ODBC C data type is:

SQL_C_TYPE_DATE

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

SQL type identifier	Test	SQLSTATE
SQL_CHAR SQL_VARCHAR SQL_LONGVARCHAR	Column byte length >= 10 Column byte length < 10 Data value is not a valid date	n/a 22001 22008
SQL_WCHAR SQL_WVARCHAR SQL_WLONGVARCHAR	Column character length >= 10 Column character length < 10 Data value is not a valid date	n/a 22001 22008
SQL_TYPE_DATE	Data value is a valid date Data value is not a valid date	n/a 22007
SQL_TYPE_TIMESTAMP	Data value is a valid date[a] Data value is not a valid date	n/a 22007

[a] The time portion of the timestamp is set to zero.

For information about what values are valid in a SQL_C_TYPE_DATE structure, see C Data Types, earlier in this appendix.

When date C data is converted to character SQL data, the resulting character data is in the "yyyy-mm-dd" format.

The driver ignores the length/indicator value when converting data from the date C data type and assumes that the size of the data buffer is the size of the date C data type. The length/indicator value is passed in the StrLen_or_Ind argument in SQLPutData and in the buffer specified with the StrLen_or_IndPtr argument in SQLBindParameter. The data buffer is specified with the DataPtr argument in SQLPutData and the ParameterValuePtr argument in SQLBindParameter.