SQLNumResultCols - Get number of result columns
SQLNumResultCols() returns the number of columns in the result set associated with the input statement handle.
SQLPrepare() or SQLExecDirect() must be called before calling this function.
After calling this function, you can call SQLDescribeCol(), SQLColAttribute(), SQLBindCol(), or SQLGetData().
Syntax
SQLRETURN SQLNumResultCols (SQLHSTMT hstmt,
SQLSMALLINT *pccol);
Function arguments
Data type | Argument | Use | Description |
---|---|---|---|
SQLHSTMT | hstmt | Input | Statement handle. |
SQLSMALLINT * | pccol | Output | Number of columns in the result set. |
Usage
The function sets the output argument to zero if the last statement processed on the input statement handle is not a SELECT.
Return codes
- SQL_SUCCESS
- SQL_ERROR
- SQL_INVALID_HANDLE
Diagnostics
SQLSTATE | Description | Explanation |
---|---|---|
40003 * | Statement completion unknown | The communication link between the CLI and the data source fails before the function completes processing. |
58004 | System error | Unrecoverable system error. |
HY001 | Memory allocation failure | The driver is unable to allocate memory required to support the processing or completion of the function. |
HY009 | Argument value that is not valid | pcbCol is a null pointer. |
HY010 | Function sequence error | The function is called before calling SQLPrepare or SQLExecDirect for the hstmt. |
S1013 * | Memory management problem. | The driver is unable to access memory required to support the processing or completion of the function. |