Updated at: 2022-08-03 GMT+08:00

SQLBindCol

Function

SQLBindCol is used to associate (bind) columns in a result set to an application data buffer.

Prototype

SQLRETURN SQLBindCol(SQLHSTMT StatementHandle, SQLUSMALLINT ColumnNumber, SQLSMALLINT TargetType, SQLPOINTER TargetValuePtr, SQLLEN BufferLength, SQLLEN *StrLen_or_IndPtr);

Parameter

Table 1 SQLBindCol parameters

Keyword

Description

StatementHandle

Statement handle.

ColumnNumber

Number of the column to be bound. The column number starts with 0 and increases in ascending order. Column 0 is the bookmark column. If no bookmark column is set, column numbers start at 1.

TargetType

The C data type in the buffer.

TargetValuePtr

Output parameter: pointer to the buffer bound with the column. The SQLFetch function returns data in the buffer. If TargetValuePtr is null, StrLen_or_IndPtr is a valid value.

BufferLength

Size of the TargetValuePtr buffer in bytes available to store the column data.

StrLen_or_IndPtr

Output parameter: pointer to the length or indicator of the buffer. If StrLen_or_IndPtr is null, no length or indicator is used.

Return Values

  • SQL_SUCCESS indicates that the call succeeded.
  • SQL_SUCCESS_WITH_INFO indicates some warning information is displayed.
  • SQL_ERROR indicates major errors, such as memory allocation and connection failures.
  • SQL_INVALID_HANDLE indicates that invalid handles were called. Values returned by other APIs are similar to the preceding values.

Precautions

If SQLBindCol returns SQL_ERROR or SQL_SUCCESS_WITH_INFO, the application can then call SQLGetDiagRec, with HandleType and Handle set to SQL_HANDLE_STMT and StatementHandle, respectively, to obtain the SQLSTATE value. The SQLSTATE value provides the detailed function calling information.

Examples

See Examples.

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