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DROP IF EXISTS for columns and constraints. Andres Freund.

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This commit is contained in:
Andrew Dunstan
2009-07-20 02:42:28 +00:00
parent 31d1f23302
commit e73131a16a
8 changed files with 111 additions and 32 deletions
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9
src/test/regress/sql/alter_table.sql
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@@ -816,6 +816,8 @@ create table dropColumnAnother (d int) inherits (dropColumnChild);
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;
@@ -913,6 +915,11 @@ alter table gc1 drop column name;
-- should work and drop the attribute in all tables
alter table p2 drop column height;
-- IF EXISTS test
create table dropColumnExists ();
alter table dropColumnExists drop column non_existing; --fail
alter table dropColumnExists drop column if exists non_existing; --succeed
select relname, attname, attinhcount, attislocal
from pg_class join pg_attribute on (pg_class.oid = pg_attribute.attrelid)
where relname in ('p1','p2','c1','gc1') and attnum > 0 and not attisdropped
@@ -1057,6 +1064,8 @@ alter table anothertab alter column atcol1 drop default;
alter table anothertab alter column atcol1 type boolean
using case when atcol1 % 2 = 0 then true else false end; -- fails
alter table anothertab drop constraint anothertab_chk;
alter table anothertab drop constraint anothertab_chk; -- fails
alter table anothertab drop constraint IF EXISTS anothertab_chk; -- succeeds
alter table anothertab alter column atcol1 type boolean
using case when atcol1 % 2 = 0 then true else false end;