Function ExecutorRun

src/backend/executor/execMain.c:820–846

---------------------------------------------------------------- * ExecutorRun * * This is the main routine of the executor module. It accepts * the query descriptor from the traffic cop and executes the * query plan. * * ExecutorStart must have been called already. * * If direction is NoMovementScanDirection then nothing is done * except to start up/shut down the destination. Ot

 * ----------------------------------------------------------------
 */
void
ExecutorRun(QueryDesc *queryDesc,
			ScanDirection direction, uint64 count,
			bool execute_once)
{
	/*
	 * Greenplum specific code:
	 * auto_stats() needs to know if it is inside procedure call so
	 * we maintain executor_run_nesting_level here. See detailed comments
	 * at the definition of the static variable executor_run_nesting_level.
	 */
	executor_run_nesting_level++;
	PG_TRY();
	{
		if (ExecutorRun_hook)
			(*ExecutorRun_hook) (queryDesc, direction, count, execute_once);
		else
			standard_ExecutorRun(queryDesc, direction, count, execute_once);
		executor_run_nesting_level--;
	}
	PG_CATCH();
	{
		executor_run_nesting_level--;
		PG_RE_THROW();
	}
	PG_END_TRY();
}

void
standard_ExecutorRun(QueryDesc *queryDesc,