* In DetachPartitionFinalize() we were applying a tuple conversion map
to tuples that didn't need one, which can lead to erratic behavior if
a partitioned table has a partition with a different column order, as
reported by Alexander Lakhin. This was introduced by
53af9491a043.
Don't do that. Also, modify a recently added test case to exercise
this.
* The same function as well as CloneFkReferenced() were acquiring
AccessShareLock on a partition, only to have CreateTrigger() later
acquire ShareRowExclusiveLock on it. This can lead to deadlock by
lock escalation, unnecessarily. Avoid that by acquiring the stronger
lock to begin with. This probably dates back to branch 12, but I have
never seen a report of this being a problem in the field.
* Innocuous but wasteful: also introduced by
53af9491a043, we were
reading a pg_constraint tuple from syscache that we don't need, as
reported by Tender Wang. Don't.
Backpatch to 15.
Discussion: https://postgr.es/m/
461e9c26-2076-8224-e119-
84998b6a784e@gmail.com
Oid deleteTriggerOid,
updateTriggerOid;
+ Assert(CheckRelationLockedByMe(pkrel, ShareRowExclusiveLock, true));
+ Assert(CheckRelationLockedByMe(rel, ShareRowExclusiveLock, true));
+
/*
* Create the action triggers that enforce the constraint.
*/
Oid partIndexId;
ObjectAddress address;
+ /* XXX would it be better to acquire these locks beforehand? */
partRel = table_open(pd->oids[i], ShareRowExclusiveLock);
/*
updateTriggerOid;
Assert(OidIsValid(parentConstr));
+ Assert(CheckRelationLockedByMe(rel, ShareRowExclusiveLock, true));
+ Assert(CheckRelationLockedByMe(pkrel, ShareRowExclusiveLock, true));
if (rel->rd_rel->relkind == RELKIND_FOREIGN_TABLE)
ereport(ERROR,
continue;
}
- /*
- * Because we're only expanding the key space at the referenced side,
- * we don't need to prevent any operation in the referencing table, so
- * AccessShareLock suffices (assumes that dropping the constraint
- * acquires AccessExclusiveLock).
- */
- fkRel = table_open(constrForm->conrelid, AccessShareLock);
+ /* We need the same lock level that CreateTrigger will acquire */
+ fkRel = table_open(constrForm->conrelid, ShareRowExclusiveLock);
indexOid = constrForm->conindid;
DeconstructFkConstraintRow(tuple,
foreach(cell, fks)
{
ForeignKeyCacheInfo *fk = lfirst(cell);
- HeapTuple contup,
- parentConTup;
+ HeapTuple contup;
Form_pg_constraint conform;
Oid insertTriggerOid,
updateTriggerOid;
continue;
}
- Assert(OidIsValid(conform->conparentid));
- parentConTup = SearchSysCache1(CONSTROID,
- ObjectIdGetDatum(conform->conparentid));
- if (!HeapTupleIsValid(parentConTup))
- elog(ERROR, "cache lookup failed for constraint %u",
- conform->conparentid);
-
/*
* The constraint on this table must be marked no longer a child of
* the parent's constraint, as do its check triggers.
Oid conffeqop[INDEX_MAX_KEYS];
int numfkdelsetcols;
AttrNumber confdelsetcols[INDEX_MAX_KEYS];
- AttrMap *attmap;
Relation refdRel;
DeconstructFkConstraintRow(contup,
fkconstraint->old_pktable_oid = InvalidOid;
fkconstraint->location = -1;
- attmap = build_attrmap_by_name(RelationGetDescr(partRel),
- RelationGetDescr(rel),
- false);
+ /* set up colnames, used to generate the constraint name */
for (int i = 0; i < numfks; i++)
{
Form_pg_attribute att;
att = TupleDescAttr(RelationGetDescr(partRel),
- attmap->attnums[conkey[i] - 1] - 1);
+ conkey[i] - 1);
+
fkconstraint->fk_attrs = lappend(fkconstraint->fk_attrs,
makeString(NameStr(att->attname)));
}
- refdRel = table_open(fk->confrelid, AccessShareLock);
+ refdRel = table_open(fk->confrelid, ShareRowExclusiveLock);
addFkRecurseReferenced(fkconstraint, partRel,
refdRel,
confdelsetcols,
true,
InvalidOid, InvalidOid);
- table_close(refdRel, AccessShareLock);
+ table_close(refdRel, NoLock); /* keep lock till end of xact */
}
ReleaseSysCache(contup);
- ReleaseSysCache(parentConTup);
}
list_free_deep(fks);
if (trigrel)
CREATE TABLE fk_p ( id int, jd int, PRIMARY KEY(id, jd)) PARTITION BY list (id)
CREATE TABLE fk_p_1 PARTITION OF fk_p FOR VALUES IN (1) PARTITION BY list (jd)
CREATE TABLE fk_p_1_1 PARTITION OF fk_p_1 FOR VALUES IN (1)
- CREATE TABLE fk_p_1_2 PARTITION OF fk_p_1 FOR VALUES IN (2)
+ CREATE TABLE fk_p_1_2 (x int, y int, jd int NOT NULL, id int NOT NULL)
CREATE TABLE fk_p_2 PARTITION OF fk_p FOR VALUES IN (2) PARTITION BY list (jd)
CREATE TABLE fk_p_2_1 PARTITION OF fk_p_2 FOR VALUES IN (1)
CREATE TABLE fk_p_2_2 PARTITION OF fk_p_2 FOR VALUES IN (2)
- CREATE TABLE fk_r_1 ( id int PRIMARY KEY, p_id int NOT NULL, p_jd int NOT NULL)
+ CREATE TABLE fk_r_1 ( p_jd int NOT NULL, x int, id int PRIMARY KEY, p_id int NOT NULL)
CREATE TABLE fk_r_2 ( id int PRIMARY KEY, p_id int NOT NULL, p_jd int NOT NULL) PARTITION BY list (id)
CREATE TABLE fk_r_2_1 PARTITION OF fk_r_2 FOR VALUES IN (2, 1)
CREATE TABLE fk_r ( id int PRIMARY KEY, p_id int NOT NULL, p_jd int NOT NULL,
FOREIGN KEY (p_id, p_jd) REFERENCES fk_p (id, jd)
) PARTITION BY list (id);
SET search_path TO fkpart12;
+ALTER TABLE fk_p_1_2 DROP COLUMN x, DROP COLUMN y;
+ALTER TABLE fk_p_1 ATTACH PARTITION fk_p_1_2 FOR VALUES IN (2);
+ALTER TABLE fk_r_1 DROP COLUMN x;
INSERT INTO fk_p VALUES (1, 1);
ALTER TABLE fk_r ATTACH PARTITION fk_r_1 FOR VALUES IN (1);
ALTER TABLE fk_r ATTACH PARTITION fk_r_2 FOR VALUES IN (2);
"fk_r_p_id_p_jd_fkey" FOREIGN KEY (p_id, p_jd) REFERENCES fk_p(id, jd)
Number of partitions: 1 (Use \d+ to list them.)
-INSERT INTO fk_r_1 VALUES (2, 1, 2); -- should fail
+INSERT INTO fk_r_1 (id, p_id, p_jd) VALUES (2, 1, 2); -- should fail
ERROR: insert or update on table "fk_r_1" violates foreign key constraint "fk_r_p_id_p_jd_fkey"
DETAIL: Key (p_id, p_jd)=(1, 2) is not present in table "fk_p".
DELETE FROM fk_p; -- should fail
CREATE TABLE fk_p ( id int, jd int, PRIMARY KEY(id, jd)) PARTITION BY list (id)
CREATE TABLE fk_p_1 PARTITION OF fk_p FOR VALUES IN (1) PARTITION BY list (jd)
CREATE TABLE fk_p_1_1 PARTITION OF fk_p_1 FOR VALUES IN (1)
- CREATE TABLE fk_p_1_2 PARTITION OF fk_p_1 FOR VALUES IN (2)
+ CREATE TABLE fk_p_1_2 (x int, y int, jd int NOT NULL, id int NOT NULL)
CREATE TABLE fk_p_2 PARTITION OF fk_p FOR VALUES IN (2) PARTITION BY list (jd)
CREATE TABLE fk_p_2_1 PARTITION OF fk_p_2 FOR VALUES IN (1)
CREATE TABLE fk_p_2_2 PARTITION OF fk_p_2 FOR VALUES IN (2)
- CREATE TABLE fk_r_1 ( id int PRIMARY KEY, p_id int NOT NULL, p_jd int NOT NULL)
+ CREATE TABLE fk_r_1 ( p_jd int NOT NULL, x int, id int PRIMARY KEY, p_id int NOT NULL)
CREATE TABLE fk_r_2 ( id int PRIMARY KEY, p_id int NOT NULL, p_jd int NOT NULL) PARTITION BY list (id)
CREATE TABLE fk_r_2_1 PARTITION OF fk_r_2 FOR VALUES IN (2, 1)
CREATE TABLE fk_r ( id int PRIMARY KEY, p_id int NOT NULL, p_jd int NOT NULL,
) PARTITION BY list (id);
SET search_path TO fkpart12;
+ALTER TABLE fk_p_1_2 DROP COLUMN x, DROP COLUMN y;
+ALTER TABLE fk_p_1 ATTACH PARTITION fk_p_1_2 FOR VALUES IN (2);
+ALTER TABLE fk_r_1 DROP COLUMN x;
+
INSERT INTO fk_p VALUES (1, 1);
ALTER TABLE fk_r ATTACH PARTITION fk_r_1 FOR VALUES IN (1);
\d fk_r_2
-INSERT INTO fk_r_1 VALUES (2, 1, 2); -- should fail
+INSERT INTO fk_r_1 (id, p_id, p_jd) VALUES (2, 1, 2); -- should fail
DELETE FROM fk_p; -- should fail
ALTER TABLE fk_r ATTACH PARTITION fk_r_1 FOR VALUES IN (1);
projects / postgresql.git / commitdiff