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Invalidate relcache for publications defined for all tables. 

Updates/Deletes on a relation were allowed even without replica identity
after we define the publication for all tables. This would later lead to
an error on subscribers. The reason was that for such publications we were
not invalidating the relcache and the publication information for
relations was not getting rebuilt. Similarly, we were not invalidating the
relcache after dropping of such publications which will prohibit
Updates/Deletes without replica identity even without any publication.

Author: Vignesh C and Hou Zhijie
Reviewed-by: Hou Zhijie, Kyotaro Horiguchi, Amit Kapila
Backpatch-through: 10, where it was introduced
Discussion: https://postgr.es/m/CALDaNm0pF6zeWqCA8TCe2sDuwFAy8fCqba=nHampCKag-qLixg@mail.gmail.com
This commit is contained in:
Amit Kapila 2021-09-08 10:39:13 +05:30
parent eb3c8d2480
commit 2eb09f27db
3 changed files with 42 additions and 1 deletions
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14
src/backend/commands/publicationcmds.c
View File

@ -227,6 +227,11 @@ CreatePublication(CreatePublicationStmt *stmt)
PublicationAddTables(puboid, rels, true, NULL);
CloseTableList(rels);
}
else if (stmt->for_all_tables)
{
/* Invalidate relcache so that publication info is rebuilt. */
CacheInvalidateRelcacheAll();
}
table_close(rel, RowExclusiveLock);
@ -440,13 +445,14 @@ AlterPublication(AlterPublicationStmt *stmt)
}
/*
* Drop publication by OID
* Remove the publication by mapping OID.
*/
void
RemovePublicationById(Oid pubid)
{
Relation rel;
HeapTuple tup;
Form_pg_publication pubform;
rel = table_open(PublicationRelationId, RowExclusiveLock);
@ -455,6 +461,12 @@ RemovePublicationById(Oid pubid)
if (!HeapTupleIsValid(tup))
elog(ERROR, "cache lookup failed for publication %u", pubid);
pubform = (Form_pg_publication) GETSTRUCT(tup);
/* Invalidate relcache so that publication info is rebuilt. */
if (pubform->puballtables)
CacheInvalidateRelcacheAll();
CatalogTupleDelete(rel, &tup->t_self);
ReleaseSysCache(tup);

15
src/test/regress/expected/publication.out
View File

@ -107,6 +107,21 @@ Tables:
DROP TABLE testpub_tbl3, testpub_tbl3a;
DROP PUBLICATION testpub3, testpub4;
-- Test cache invalidation FOR ALL TABLES publication
SET client_min_messages = 'ERROR';
CREATE TABLE testpub_tbl4(a int);
INSERT INTO testpub_tbl4 values(1);
UPDATE testpub_tbl4 set a = 2;
CREATE PUBLICATION testpub_foralltables FOR ALL TABLES;
RESET client_min_messages;
-- fail missing REPLICA IDENTITY
UPDATE testpub_tbl4 set a = 3;
ERROR: cannot update table "testpub_tbl4" because it does not have a replica identity and publishes updates
HINT: To enable updating the table, set REPLICA IDENTITY using ALTER TABLE.
DROP PUBLICATION testpub_foralltables;
-- should pass after dropping the publication
UPDATE testpub_tbl4 set a = 3;
DROP TABLE testpub_tbl4;
-- fail - view
CREATE PUBLICATION testpub_fortbl FOR TABLE testpub_view;
ERROR: "testpub_view" is not a table

14
src/test/regress/sql/publication.sql
View File

@ -60,6 +60,20 @@ CREATE PUBLICATION testpub4 FOR TABLE ONLY testpub_tbl3;
DROP TABLE testpub_tbl3, testpub_tbl3a;
DROP PUBLICATION testpub3, testpub4;
-- Test cache invalidation FOR ALL TABLES publication
SET client_min_messages = 'ERROR';
CREATE TABLE testpub_tbl4(a int);
INSERT INTO testpub_tbl4 values(1);
UPDATE testpub_tbl4 set a = 2;
CREATE PUBLICATION testpub_foralltables FOR ALL TABLES;
RESET client_min_messages;
-- fail missing REPLICA IDENTITY
UPDATE testpub_tbl4 set a = 3;
DROP PUBLICATION testpub_foralltables;
-- should pass after dropping the publication
UPDATE testpub_tbl4 set a = 3;
DROP TABLE testpub_tbl4;
-- fail - view
CREATE PUBLICATION testpub_fortbl FOR TABLE testpub_view;
CREATE PUBLICATION testpub_fortbl FOR TABLE testpub_tbl1, pub_test.testpub_nopk;