MDAC 2.5 SDK - ODBC Programmer's Reference
Appendix D: Data Types
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 the section "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.