Use the get_is_cancelled v4 API method to determine whether the statement has been cancelled.
short get_is_cancelled( a_v4_extfn_proc_context * cntxt, )
If a UDF entry point is performing work for an extended period of time (many seconds), it should, if possible, call the get_is_cancelled callback every second or two to see if the user has interrupted the current statement. If the statement has been interrupted, a nonzero value is returned and the UDF entry point should then immediately return. Call the _finish_extfn function to perform necessary cleanup. Do not subsequently call any other UDF entry points.
| Parameter | Description |
|---|---|
| cntxt | The procedure context object. |
A nonzero value, if the statement is interrupted.