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Fix crash if a DROP is attempted on an internally-dependent object.

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Introduced in 8.4 rewrite of dependency.c.
Per bug #5072 from Amit Khandekar.
This commit is contained in:
Tom Lane 2009-09-22 15:46:35 +00:00
parent 02faeb4ac8
commit d5a43ffde0
3 changed files with 23 additions and 6 deletions
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5
src/backend/catalog/dependency.c
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@ -8,7 +8,7 @@
* Portions Copyright (c) 1994, Regents of the University of California * Portions Copyright (c) 1994, Regents of the University of California
* *
* IDENTIFICATION * IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/catalog/dependency.c,v 1.90 2009/08/07 15:27:56 tgl Exp $ * $PostgreSQL: pgsql/src/backend/catalog/dependency.c,v 1.91 2009/09/22 15:46:34 tgl Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -559,7 +559,8 @@ findDependentObjects(const ObjectAddress *object,
{ {
char *otherObjDesc; char *otherObjDesc;
if (object_address_present(&otherObject, pendingObjects)) if (pendingObjects &&
object_address_present(&otherObject, pendingObjects))
{ {
systable_endscan(scan); systable_endscan(scan);
/* need to release caller's lock; see notes below */ /* need to release caller's lock; see notes below */

8
src/test/regress/expected/rules.out
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@ -1444,6 +1444,14 @@ insert into rule_and_refint_t3 values (1, 13, 11, 'row8');
ERROR: insert or update on table "rule_and_refint_t3" violates foreign key constraint "rule_and_refint_t3_id3a_fkey" ERROR: insert or update on table "rule_and_refint_t3" violates foreign key constraint "rule_and_refint_t3_id3a_fkey"
DETAIL: Key (id3a, id3b)=(1, 13) is not present in table "rule_and_refint_t1". DETAIL: Key (id3a, id3b)=(1, 13) is not present in table "rule_and_refint_t1".
-- --
-- disallow dropping a view's rule (bug #5072)
--
create view fooview as select 'foo'::text;
drop rule "_RETURN" on fooview;
ERROR: cannot drop rule _RETURN on view fooview because view fooview requires it
HINT: You can drop view fooview instead.
drop view fooview;
--
-- check for planner problems with complex inherited UPDATES -- check for planner problems with complex inherited UPDATES
-- --
create table id (id serial primary key, name text); create table id (id serial primary key, name text);

8
src/test/regress/sql/rules.sql
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@ -851,6 +851,14 @@ create rule rule_and_refint_t3_ins as on insert to rule_and_refint_t3
insert into rule_and_refint_t3 values (1, 11, 13, 'row7'); insert into rule_and_refint_t3 values (1, 11, 13, 'row7');
insert into rule_and_refint_t3 values (1, 13, 11, 'row8'); insert into rule_and_refint_t3 values (1, 13, 11, 'row8');
--
-- disallow dropping a view's rule (bug #5072)
--
create view fooview as select 'foo'::text;
drop rule "_RETURN" on fooview;
drop view fooview;
-- --
-- check for planner problems with complex inherited UPDATES -- check for planner problems with complex inherited UPDATES
-- --