Checks if a result set column or output parameter has the SQL null value.
Parameters
MimerStatement statementhandle,
int16_t paramno_colno)
|
statementhandle |
in |
A handle returned by MimerBeginStatement[C|8], identifying a statement that have been executed. |
|
paramno_colno |
in |
The parameter number or column number to check for null in. First column/parameter is 1. |
Returns
If the column or parameter is the SQL null value, a positive value is returned. If it is not the SQL null value zero is returned. If an error occurred, a negative error code is returned.
|
Return value |
Description |
|---|---|
|
> 0 |
Null is returned. |
|
0 |
Not null. |
|
MIMER_HANDLE_INVALID |
The statementhandle parameter was not recognized as a handle. |
|
MIMER_NONEXISTENT_COLUMN_PARAMETER |
The supplied column or parameter number did not exist. |
|
MIMER_PARAMETER_NOT_OUTPUT |
The referenced parameter is not an output or input/output parameter, which is required when calling a data output routine. |
|
MIMER_SEQUENCE_ERROR |
If the statement cursor is not open, or the current row is before the first row of the result set, or after the last row of the result set. |
Notes
Micro API compatible.