Fix variable lifespan in ExecInitCoerceToDomain().

tglsfdc · tglsfdc · commit 16a56774fade · 2021-11-02T13:36:53.000-04:00
This undoes a mistake in 1ec7679: domainval and domainnull were meant to live across loop iterations, but they were incorrectly moved inside the loop. The effect was only to emit useless extra EEOP_MAKE_READONLY steps, so it's not a big deal; nonetheless, back-patch to v13 where the mistake was introduced. Ranier Vilela Discussion: https://postgr.es/m/CAEudQAqXuhbkaAp-sGH6dR6Nsq7v28_0TPexHOm6FiDYqwQD-w@mail.gmail.com
diff --git a/src/backend/executor/execExpr.c b/src/backend/executor/execExpr.c
@@ -3121,6 +3121,8 @@ ExecInitCoerceToDomain(ExprEvalStep *scratch, CoerceToDomain *ctest,
 					   ExprState *state, Datum *resv, bool *resnull)
 {
 	DomainConstraintRef *constraint_ref;
+	Datum	   *domainval = NULL;
+	bool	   *domainnull = NULL;
 	ListCell   *l;
 
 	scratch->d.domaincheck.resulttype = ctest->resulttype;
@@ -3167,8 +3169,6 @@ ExecInitCoerceToDomain(ExprEvalStep *scratch, CoerceToDomain *ctest,
 	foreach(l, constraint_ref->constraints)
 	{
 		DomainConstraintState *con = (DomainConstraintState *) lfirst(l);
-		Datum	   *domainval = NULL;
-		bool	   *domainnull = NULL;
 		Datum	   *save_innermost_domainval;
 		bool	   *save_innermost_domainnull;
 
