From 8ce61fa793200f54514bae916cedb0eb7d3c8032 Mon Sep 17 00:00:00 2001 From: Amul Sul Date: Tue, 14 Jan 2025 22:35:32 +0530 Subject: [PATCH v10 4/7] refactor: Change ATExecAlterConstrRecurse() argument. Instead of passing the Relation of the referencing relation, we will pass a relid. Opening the relation using the relid again should not cause significant issues. However, this approach makes recursion more efficient, especially in the later patch where we will be recreating the referencing and referred triggers. In addition to that passing relid of the referred relation too. ---- NOTE: This patch is not meant to be committed separately. It should be squashed with the main patch that adds ENFORCED/NOT ENFORCED. ---- --- src/backend/commands/tablecmds.c | 36 +++++++++++++++++--------------- 1 file changed, 19 insertions(+), 17 deletions(-) diff --git a/src/backend/commands/tablecmds.c b/src/backend/commands/tablecmds.c index b1c93320c6b..2164eaf017b 100644 --- a/src/backend/commands/tablecmds.c +++ b/src/backend/commands/tablecmds.c @@ -392,13 +392,15 @@ static void AlterSeqNamespaces(Relation classRel, Relation rel, static ObjectAddress ATExecAlterConstraint(Relation rel, AlterTableCmd *cmd, bool recurse, bool recursing, LOCKMODE lockmode); static bool ATExecAlterConstrRecurse(Constraint *cmdcon, Relation conrel, Relation tgrel, - Relation rel, HeapTuple contuple, List **otherrelids, + const Oid fkrelid, const Oid pkrelid, + HeapTuple contuple, List **otherrelids, LOCKMODE lockmode); static void AlterConstrTriggerDeferrability(Oid conoid, Relation tgrel, Relation rel, bool deferrable, bool initdeferred, List **otherrelids); static void ATExecAlterChildConstr(Constraint *cmdcon, Relation conrel, Relation tgrel, - Relation rel, HeapTuple contuple, List **otherrelids, + const Oid fkrelid, const Oid pkrelid, + HeapTuple contuple, List **otherrelids, LOCKMODE lockmode); static ObjectAddress ATExecValidateConstraint(List **wqueue, Relation rel, char *constrName, @@ -11925,8 +11927,9 @@ ATExecAlterConstraint(Relation rel, AlterTableCmd *cmd, bool recurse, currcon->condeferred != cmdcon->initdeferred || rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE) { - if (ATExecAlterConstrRecurse(cmdcon, conrel, tgrel, rel, contuple, - &otherrelids, lockmode)) + if (ATExecAlterConstrRecurse(cmdcon, conrel, tgrel, currcon->conrelid, + currcon->confrelid, contuple, &otherrelids, + lockmode)) ObjectAddressSet(address, ConstraintRelationId, currcon->oid); } @@ -11959,13 +11962,15 @@ ATExecAlterConstraint(Relation rel, AlterTableCmd *cmd, bool recurse, */ static bool ATExecAlterConstrRecurse(Constraint *cmdcon, Relation conrel, Relation tgrel, - Relation rel, HeapTuple contuple, List **otherrelids, + const Oid fkrelid, const Oid pkrelid, + HeapTuple contuple, List **otherrelids, LOCKMODE lockmode) { Form_pg_constraint currcon; Oid conoid; Oid refrelid; bool changed = false; + Relation rel; /* since this function recurses, it could be driven to stack overflow */ check_stack_depth(); @@ -11974,6 +11979,8 @@ ATExecAlterConstrRecurse(Constraint *cmdcon, Relation conrel, Relation tgrel, conoid = currcon->oid; refrelid = currcon->confrelid; + rel = table_open(currcon->conrelid, lockmode); + /* * Update pg_constraint with the flags from cmdcon. * @@ -12019,8 +12026,9 @@ ATExecAlterConstrRecurse(Constraint *cmdcon, Relation conrel, Relation tgrel, */ if (rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE || get_rel_relkind(refrelid) == RELKIND_PARTITIONED_TABLE) - ATExecAlterChildConstr(cmdcon, conrel, tgrel, rel, contuple, - otherrelids, lockmode); + ATExecAlterChildConstr(cmdcon, conrel, tgrel, fkrelid, pkrelid, + contuple, otherrelids, lockmode); + table_close(rel, NoLock); return changed; } @@ -12099,7 +12107,8 @@ AlterConstrTriggerDeferrability(Oid conoid, Relation tgrel, Relation rel, */ static void ATExecAlterChildConstr(Constraint *cmdcon, Relation conrel, Relation tgrel, - Relation rel, HeapTuple contuple, List **otherrelids, + const Oid fkrelid, const Oid pkrelid, + HeapTuple contuple, List **otherrelids, LOCKMODE lockmode) { Form_pg_constraint currcon; @@ -12120,15 +12129,8 @@ ATExecAlterChildConstr(Constraint *cmdcon, Relation conrel, Relation tgrel, true, NULL, 1, &pkey); while (HeapTupleIsValid(childtup = systable_getnext(pscan))) - { - Form_pg_constraint childcon = (Form_pg_constraint) GETSTRUCT(childtup); - Relation childrel; - - childrel = table_open(childcon->conrelid, lockmode); - ATExecAlterConstrRecurse(cmdcon, conrel, tgrel, childrel, childtup, - otherrelids, lockmode); - table_close(childrel, NoLock); - } + ATExecAlterConstrRecurse(cmdcon, conrel, tgrel, fkrelid, pkrelid, + childtup, otherrelids, lockmode); systable_endscan(pscan); } -- 2.43.5