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Add attisinherited column to pg_attribute; use it to guard against

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column additions, deletions, and renames that would let a child table
get out of sync with its parent.  Patch by Alvaro Herrera, with some
kibitzing by Tom Lane.
This commit is contained in:
Tom Lane
2002-08-30 19:23:20 +00:00
parent 96fd7192e7
commit e2d156fa6e
18 changed files with 488 additions and 326 deletions
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31
src/test/regress/expected/alter_table.out
View File

@@ -1023,3 +1023,34 @@ select * from test;
(3 rows)
drop table test;
-- test inheritance
create table dropColumn (a int, b int, e int);
create table dropColumnChild (c int) inherits (dropColumn);
create table dropColumnAnother (d int) inherits (dropColumnChild);
-- these two should fail
alter table dropColumnchild drop column a;
ERROR: ALTER TABLE: Cannot drop inherited column "a"
alter table only dropColumnChild drop column b;
ERROR: ALTER TABLE: Cannot drop inherited column "b"
-- these three should work
alter table only dropColumn drop column e;
alter table dropColumnChild drop column c;
alter table dropColumn drop column a;
create table renameColumn (a int);
create table renameColumnChild (b int) inherits (renameColumn);
create table renameColumnAnother (c int) inherits (renameColumnChild);
-- these three should fail
alter table renameColumnChild rename column a to d;
ERROR: renameatt: inherited attribute "a" may not be renamed
alter table only renameColumnChild rename column a to d;
ERROR: Inherited attribute "a" must be renamed in child tables too
alter table only renameColumn rename column a to d;
ERROR: Inherited attribute "a" must be renamed in child tables too
-- these should work
alter table renameColumn rename column a to d;
alter table renameColumnChild rename column b to a;
-- this should work
alter table renameColumn add column w int;
-- this should fail
alter table only renameColumn add column x int;
ERROR: Attribute must be added to child tables too

33
src/test/regress/sql/alter_table.sql
View File

@@ -731,3 +731,36 @@ copy test(b,c) from stdin;
select * from test;
drop table test;
-- test inheritance
create table dropColumn (a int, b int, e int);
create table dropColumnChild (c int) inherits (dropColumn);
create table dropColumnAnother (d int) inherits (dropColumnChild);
-- these two should fail
alter table dropColumnchild drop column a;
alter table only dropColumnChild drop column b;
-- these three should work
alter table only dropColumn drop column e;
alter table dropColumnChild drop column c;
alter table dropColumn drop column a;
create table renameColumn (a int);
create table renameColumnChild (b int) inherits (renameColumn);
create table renameColumnAnother (c int) inherits (renameColumnChild);
-- these three should fail
alter table renameColumnChild rename column a to d;
alter table only renameColumnChild rename column a to d;
alter table only renameColumn rename column a to d;
-- these should work
alter table renameColumn rename column a to d;
alter table renameColumnChild rename column b to a;
-- this should work
alter table renameColumn add column w int;
-- this should fail
alter table only renameColumn add column x int;