Function ExecutorStart

src/backend/executor/execMain.c:228–243

---------------------------------------------------------------- * ExecutorStart * * This routine must be called at the beginning of any execution of any * query plan * * Takes a QueryDesc previously created by CreateQueryDesc (which is separate * only because some places use QueryDescs for utility commands). The tupDesc * field of the QueryDesc is filled in to describe the tuples that

 * ----------------------------------------------------------------
 */
void
ExecutorStart(QueryDesc *queryDesc, int eflags)
{
	/*
	 * In some cases (e.g. an EXECUTE statement) a query execution will skip
	 * parse analysis, which means that the query_id won't be reported.  Note
	 * that it's harmless to report the query_id multiple time, as the call
	 * will be ignored if the top level query_id has already been reported.
	 */
	pgstat_report_query_id(queryDesc->plannedstmt->queryId, false);

	if (ExecutorStart_hook)
		(*ExecutorStart_hook) (queryDesc, eflags);
	else
		standard_ExecutorStart(queryDesc, eflags);
}

void
standard_ExecutorStart(QueryDesc *queryDesc, int eflags)