/* ----------------------------------------------------------------
* ExecShutdownGatherMergeWorkers
*
* Stop all the parallel workers.
* ----------------------------------------------------------------
*/
static void
ExecShutdownGatherMergeWorkers(GatherMergeState *node)
{
if (node->pei != NULL)
ExecParallelFinish(node->pei);
/* Flush local copy of reader array */
if (node->reader)
pfree(node->reader);
node->reader = NULL;
}
/* ----------------------------------------------------------------
* ExecShutdownGatherWorkers
*
* Destroy the parallel workers. Collect all the stats after
* workers are stopped, else some work done by workers won't be
* accounted.
* ----------------------------------------------------------------
*/
static void
ExecShutdownGatherWorkers(GatherState *node)
{
/* Shut down tuple queue readers before shutting down workers. */
if (node->reader != NULL)
{
int i;
for (i = 0; i < node->nreaders; ++i)
DestroyTupleQueueReader(node->reader[i]);
node->reader = NULL;
}
/* Now shut down the workers. */
if (node->pei != NULL)
ExecParallelFinish(node->pei);
}