1 files changed, 0 insertions, 302 deletions

diff --git a/src/backend/catalog/pg_constraint.c b/src/backend/catalog/pg_constraint.c
index 6235729f69f..5720c652b2c 100644
--- a/src/backend/catalog/pg_constraint.c
+++ b/src/backend/catalog/pg_constraint.c
@@ -38,10 +38,6 @@
 #include "utils/tqual.h"
 
 
-static void clone_fk_constraints(Relation pg_constraint, Relation parentRel,
-					 Relation partRel, List *clone, List **cloned);
-
-
 /*
  * CreateConstraintEntry
  *	Create a constraint table entry.
@@ -386,304 +382,6 @@ CreateConstraintEntry(const char *constraintName,
 }
 
 /*
- * CloneForeignKeyConstraints
- *		Clone foreign keys from a partitioned table to a newly acquired
- *		partition.
- *
- * relationId is a partition of parentId, so we can be certain that it has the
- * same columns with the same datatypes.  The columns may be in different
- * order, though.
- *
- * The *cloned list is appended ClonedConstraint elements describing what was
- * created.
- */
-void
-CloneForeignKeyConstraints(Oid parentId, Oid relationId, List **cloned)
-{
-	Relation	pg_constraint;
-	Relation	parentRel;
-	Relation	rel;
-	ScanKeyData key;
-	SysScanDesc scan;
-	HeapTuple	tuple;
-	List	   *clone = NIL;
-
-	parentRel = heap_open(parentId, NoLock);	/* already got lock */
-	/* see ATAddForeignKeyConstraint about lock level */
-	rel = heap_open(relationId, AccessExclusiveLock);
-	pg_constraint = heap_open(ConstraintRelationId, RowShareLock);
-
-	/* Obtain the list of constraints to clone or attach */
-	ScanKeyInit(&key,
-				Anum_pg_constraint_conrelid, BTEqualStrategyNumber,
-				F_OIDEQ, ObjectIdGetDatum(parentId));
-	scan = systable_beginscan(pg_constraint, ConstraintRelidTypidNameIndexId, true,
-							  NULL, 1, &key);
-	while ((tuple = systable_getnext(scan)) != NULL)
-		clone = lappend_oid(clone, HeapTupleGetOid(tuple));
-	systable_endscan(scan);
-
-	/* Do the actual work, recursing to partitions as needed */
-	clone_fk_constraints(pg_constraint, parentRel, rel, clone, cloned);
-
-	/* We're done.  Clean up */
-	heap_close(parentRel, NoLock);
-	heap_close(rel, NoLock);	/* keep lock till commit */
-	heap_close(pg_constraint, RowShareLock);
-}
-
-/*
- * clone_fk_constraints
- *		Recursive subroutine for CloneForeignKeyConstraints
- *
- * Clone the given list of FK constraints when a partition is attached.
- *
- * When cloning foreign keys to a partition, it may happen that equivalent
- * constraints already exist in the partition for some of them.  We can skip
- * creating a clone in that case, and instead just attach the existing
- * constraint to the one in the parent.
- *
- * This function recurses to partitions, if the new partition is partitioned;
- * of course, only do this for FKs that were actually cloned.
- */
-static void
-clone_fk_constraints(Relation pg_constraint, Relation parentRel,
-					 Relation partRel, List *clone, List **cloned)
-{
-	AttrNumber *attmap;
-	List	   *partFKs;
-	List	   *subclone = NIL;
-	ListCell   *cell;
-
-	/*
-	 * The constraint key may differ, if the columns in the partition are
-	 * different.  This map is used to convert them.
-	 */
-	attmap = convert_tuples_by_name_map(RelationGetDescr(partRel),
-										RelationGetDescr(parentRel),
-										gettext_noop("could not convert row type"));
-
-	partFKs = copyObject(RelationGetFKeyList(partRel));
-
-	foreach(cell, clone)
-	{
-		Oid			parentConstrOid = lfirst_oid(cell);
-		Form_pg_constraint constrForm;
-		HeapTuple	tuple;
-		AttrNumber	conkey[INDEX_MAX_KEYS];
-		AttrNumber	mapped_conkey[INDEX_MAX_KEYS];
-		AttrNumber	confkey[INDEX_MAX_KEYS];
-		Oid			conpfeqop[INDEX_MAX_KEYS];
-		Oid			conppeqop[INDEX_MAX_KEYS];
-		Oid			conffeqop[INDEX_MAX_KEYS];
-		Constraint *fkconstraint;
-		bool		attach_it;
-		Oid			constrOid;
-		ObjectAddress parentAddr,
-					childAddr;
-		int			nelem;
-		ListCell   *cell;
-		int			i;
-
-		tuple = SearchSysCache1(CONSTROID, parentConstrOid);
-		if (!tuple)
-			elog(ERROR, "cache lookup failed for constraint %u",
-				 parentConstrOid);
-		constrForm = (Form_pg_constraint) GETSTRUCT(tuple);
-
-		/* only foreign keys */
-		if (constrForm->contype != CONSTRAINT_FOREIGN)
-		{
-			ReleaseSysCache(tuple);
-			continue;
-		}
-
-		ObjectAddressSet(parentAddr, ConstraintRelationId, parentConstrOid);
-
-		DeconstructFkConstraintRow(tuple, &nelem, conkey, confkey,
-								   conpfeqop, conppeqop, conffeqop);
-		for (i = 0; i < nelem; i++)
-			mapped_conkey[i] = attmap[conkey[i] - 1];
-
-		/*
-		 * Before creating a new constraint, see whether any existing FKs are
-		 * fit for the purpose.  If one is, attach the parent constraint to it,
-		 * and don't clone anything.  This way we avoid the expensive
-		 * verification step and don't end up with a duplicate FK.  This also
-		 * means we don't consider this constraint when recursing to
-		 * partitions.
-		 */
-		attach_it = false;
-		foreach(cell, partFKs)
-		{
-			ForeignKeyCacheInfo *fk = lfirst_node(ForeignKeyCacheInfo, cell);
-			Form_pg_constraint partConstr;
-			HeapTuple	partcontup;
-
-			attach_it = true;
-
-			/*
-			 * Do some quick & easy initial checks.  If any of these fail, we
-			 * cannot use this constraint, but keep looking.
-			 */
-			if (fk->confrelid != constrForm->confrelid || fk->nkeys != nelem)
-			{
-				attach_it = false;
-				continue;
-			}
-			for (i = 0; i < nelem; i++)
-			{
-				if (fk->conkey[i] != mapped_conkey[i] ||
-					fk->confkey[i] != confkey[i] ||
-					fk->conpfeqop[i] != conpfeqop[i])
-				{
-					attach_it = false;
-					break;
-				}
-			}
-			if (!attach_it)
-				continue;
-
-			/*
-			 * Looks good so far; do some more extensive checks.  Presumably
-			 * the check for 'convalidated' could be dropped, since we don't
-			 * really care about that, but let's be careful for now.
-			 */
-			partcontup = SearchSysCache1(CONSTROID,
-										 ObjectIdGetDatum(fk->conoid));
-			if (!partcontup)
-				elog(ERROR, "cache lookup failed for constraint %u",
-					 fk->conoid);
-			partConstr = (Form_pg_constraint) GETSTRUCT(partcontup);
-			if (OidIsValid(partConstr->conparentid) ||
-				!partConstr->convalidated ||
-				partConstr->condeferrable != constrForm->condeferrable ||
-				partConstr->condeferred != constrForm->condeferred ||
-				partConstr->confupdtype != constrForm->confupdtype ||
-				partConstr->confdeltype != constrForm->confdeltype ||
-				partConstr->confmatchtype != constrForm->confmatchtype)
-			{
-				ReleaseSysCache(partcontup);
-				attach_it = false;
-				continue;
-			}
-
-			ReleaseSysCache(partcontup);
-
-			/* looks good!  Attach this constraint */
-			ConstraintSetParentConstraint(fk->conoid,
-										  HeapTupleGetOid(tuple));
-			CommandCounterIncrement();
-			attach_it = true;
-			break;
-		}
-
-		/*
-		 * If we attached to an existing constraint, there is no need to
-		 * create a new one.  In fact, there's no need to recurse for this
-		 * constraint to partitions, either.
-		 */
-		if (attach_it)
-		{
-			ReleaseSysCache(tuple);
-			continue;
-		}
-
-		constrOid =
-			CreateConstraintEntry(NameStr(constrForm->conname),
-								  constrForm->connamespace,
-								  CONSTRAINT_FOREIGN,
-								  constrForm->condeferrable,
-								  constrForm->condeferred,
-								  constrForm->convalidated,
-								  HeapTupleGetOid(tuple),
-								  RelationGetRelid(partRel),
-								  mapped_conkey,
-								  nelem,
-								  nelem,
-								  InvalidOid,	/* not a domain constraint */
-								  constrForm->conindid, /* same index */
-								  constrForm->confrelid,	/* same foreign rel */
-								  confkey,
-								  conpfeqop,
-								  conppeqop,
-								  conffeqop,
-								  nelem,
-								  constrForm->confupdtype,
-								  constrForm->confdeltype,
-								  constrForm->confmatchtype,
-								  NULL,
-								  NULL,
-								  NULL,
-								  NULL,
-								  false,
-								  1, false, true);
-		subclone = lappend_oid(subclone, constrOid);
-
-		ObjectAddressSet(childAddr, ConstraintRelationId, constrOid);
-		recordDependencyOn(&childAddr, &parentAddr, DEPENDENCY_INTERNAL_AUTO);
-
-		fkconstraint = makeNode(Constraint);
-		/* for now this is all we need */
-		fkconstraint->conname = pstrdup(NameStr(constrForm->conname));
-		fkconstraint->fk_upd_action = constrForm->confupdtype;
-		fkconstraint->fk_del_action = constrForm->confdeltype;
-		fkconstraint->deferrable = constrForm->condeferrable;
-		fkconstraint->initdeferred = constrForm->condeferred;
-
-		createForeignKeyTriggers(partRel, constrForm->confrelid, fkconstraint,
-								 constrOid, constrForm->conindid, false);
-
-		if (cloned)
-		{
-			ClonedConstraint *newc;
-
-			/*
-			 * Feed back caller about the constraints we created, so that they
-			 * can set up constraint verification.
-			 */
-			newc = palloc(sizeof(ClonedConstraint));
-			newc->relid = RelationGetRelid(partRel);
-			newc->refrelid = constrForm->confrelid;
-			newc->conindid = constrForm->conindid;
-			newc->conid = constrOid;
-			newc->constraint = fkconstraint;
-
-			*cloned = lappend(*cloned, newc);
-		}
-
-		ReleaseSysCache(tuple);
-	}
-
-	pfree(attmap);
-	list_free_deep(partFKs);
-
-	/*
-	 * If the partition is partitioned, recurse to handle any constraints that
-	 * were cloned.
-	 */
-	if (partRel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE &&
-		subclone != NIL)
-	{
-		PartitionDesc partdesc = RelationGetPartitionDesc(partRel);
-		int			i;
-
-		for (i = 0; i < partdesc->nparts; i++)
-		{
-			Relation	childRel;
-
-			childRel = heap_open(partdesc->oids[i], AccessExclusiveLock);
-			clone_fk_constraints(pg_constraint,
-								 partRel,
-								 childRel,
-								 subclone,
-								 cloned);
-			heap_close(childRel, NoLock);	/* keep lock till commit */
-		}
-	}
-}
-
-/*
  * Test whether given name is currently used as a constraint name
  * for the given object (relation or domain).
  *