Fix for InitPlan-s: have to copy subselect' result tuple.

src/backend/executor/nodeSubplan.c

@@ -95,6 +95,9 @@ ExecSubPlan(SubPlan *node, List *pvar, ExprContext *econtext)
 			break;
 	}
 	
+	if ( !found && sublink->subLinkType == ALL_SUBLINK )
+		return ((Datum) true);
+	
 	return ((Datum) result);
 }
 
@@ -193,6 +196,15 @@ ExecSetParamPlan (SubPlan *node)
 			break;
 		}
 		
+		/* 
+		 * If this is uncorrelated subquery then its plan will be closed
+		 * (see below) and this tuple will be free-ed - bad for not byval
+		 * types... But is free-ing possible in the next ExecProcNode in
+		 * this loop ? Who knows... Someday we'll keep track of saved 
+		 * tuples...
+		 */
+		tup = heap_copytuple (tup);
+		
 		foreach (lst, node->setParam)
 		{
 			ParamExecData   *prm = &(plan->state->es_param_exec_vals[lfirsti(lst)]);