[CF 5747] Allow parallelism for plpgsql return expression after commit 556f7b7

This branch was automatically generated by a robot using patches from an
email thread registered at:

https://commitfest.postgresql.org/patch/5747

The branch will be overwritten each time a new patch version is posted to
the thread, and also periodically to check for bitrot caused by changes
on the master branch.

Patch(es): https://www.postgresql.org/message-id/CABgZEgdfbnq9t6xXJnmXbChNTcWFjeM_6nuig41tm327gYi2ig@mail.gmail.com
Author(s): Dipesh Dhameliya

Author: Commitfest Bot

src/pl/plpgsql/src/pl_exec.c

@@ -385,7 +385,7 @@ static Datum exec_eval_expr(PLpgSQL_execstate *estate,
 							Oid *rettype,
 							int32 *rettypmod);
 static int	exec_run_select(PLpgSQL_execstate *estate,
-							PLpgSQL_expr *expr, long maxtuples, Portal *portalP);
+							PLpgSQL_expr *expr, Portal *portalP);
 static int	exec_for_query(PLpgSQL_execstate *estate, PLpgSQL_stmt_forq *stmt,
 						   Portal portal, bool prefetch_ok);
 static ParamListInfo setup_param_list(PLpgSQL_execstate *estate,
@@ -2181,7 +2181,7 @@ exec_stmt_perform(PLpgSQL_execstate *estate, PLpgSQL_stmt_perform *stmt)
 {
 	PLpgSQL_expr *expr = stmt->expr;
 
-	(void) exec_run_select(estate, expr, 0, NULL);
+	(void) exec_run_select(estate, expr, NULL);
 	exec_set_found(estate, (estate->eval_processed != 0));
 	exec_eval_cleanup(estate);
 
@@ -2844,7 +2844,7 @@ exec_stmt_fors(PLpgSQL_execstate *estate, PLpgSQL_stmt_fors *stmt)
 	/*
 	 * Open the implicit cursor for the statement using exec_run_select
 	 */
-	exec_run_select(estate, stmt->query, 0, &portal);
+	exec_run_select(estate, stmt->query, &portal);
 
 	/*
 	 * Execute the loop
@@ -5703,7 +5703,7 @@ exec_eval_expr(PLpgSQL_execstate *estate,
 	/*
 	 * Else do it the hard way via exec_run_select
 	 */
-	rc = exec_run_select(estate, expr, 2, NULL);
+	rc = exec_run_select(estate, expr, NULL);
 	if (rc != SPI_OK_SELECT)
 		ereport(ERROR,
 				(errcode(ERRCODE_WRONG_OBJECT_TYPE),
@@ -5761,7 +5761,7 @@ exec_eval_expr(PLpgSQL_execstate *estate,
  */
 static int
 exec_run_select(PLpgSQL_execstate *estate,
-				PLpgSQL_expr *expr, long maxtuples, Portal *portalP)
+				PLpgSQL_expr *expr, Portal *portalP)
 {
 	ParamListInfo paramLI;
 	int			rc;
@@ -5810,7 +5810,7 @@ exec_run_select(PLpgSQL_execstate *estate,
 	 * Execute the query
 	 */
 	rc = SPI_execute_plan_with_paramlist(expr->plan, paramLI,
-										 estate->readonly_func, maxtuples);
+										 estate->readonly_func, 0);
 	if (rc != SPI_OK_SELECT)
 	{
 		/*