SQL to C: Date

The identifier for the date ODBC SQL data type is:

SQL_TYPE_DATE

The following table shows the ODBC C data types to which date 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

11 <= BufferLength <= Character byte length

BufferLength < 11
Data

Truncated data

Undefined
10

Length of data in bytes

Undefined
n/a

01004

22003
SQL_C_WCHAR BufferLength > Character length

11 <= BufferLength <= Character length

BufferLength < 11
Data

Truncated data

Undefined
10

Length of data in characters

Undefined
n/a

01004

22003
SQL_C_BINARY Byte length of data <= BufferLength

Byte length of data > BufferLength
Data

Undefined
Length of data in bytes

Undefined
n/a

22003
SQL_C_TYPE_DATE None[a] Data 6[c] n/a
SQL_C_TYPE_TIMESTAMP None[a] Data[b] 16[c] 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] The time fields of the timestamp structure are set to zero.

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

When date SQL data is converted to character C data, the resulting string is in the "yyyy-mm-dd" format. This format is not affected by the Windows® country setting.