DROP objecttype IF EXISTS for the following objects:

table view index sequence schema type domain conversion

src/test/regress/sql/drop_if_exists.sql

@@ -0,0 +1,91 @@
+-- 
+-- IF EXISTS tests
+-- 
+
+-- table (will be really dropped at the end)
+
+DROP TABLE test_exists;
+
+DROP TABLE IF EXISTS test_exists;
+
+CREATE TABLE test_exists (a int, b text);
+
+-- view
+
+DROP VIEW test_view_exists;
+
+DROP VIEW IF EXISTS test_view_exists;
+
+CREATE VIEW test_view_exists AS select * from test_exists;
+
+DROP VIEW IF EXISTS test_view_exists;
+
+DROP VIEW test_view_exists;
+
+-- index
+
+DROP INDEX test_index_exists;
+
+DROP INDEX IF EXISTS test_index_exists;
+
+CREATE INDEX test_index_exists on test_exists(a);
+
+DROP INDEX IF EXISTS test_index_exists;
+
+DROP INDEX test_index_exists;
+
+-- sequence
+
+DROP SEQUENCE test_sequence_exists;
+
+DROP SEQUENCE IF EXISTS test_sequence_exists;
+
+CREATE SEQUENCE test_sequence_exists;
+
+DROP SEQUENCE IF EXISTS test_sequence_exists;
+
+DROP SEQUENCE test_sequence_exists;
+
+-- schema
+
+DROP SCHEMA test_schema_exists;
+
+DROP SCHEMA IF EXISTS test_schema_exists;
+
+CREATE SCHEMA test_schema_exists;
+
+DROP SCHEMA IF EXISTS test_schema_exists;
+
+DROP SCHEMA test_schema_exists;
+
+-- type
+
+DROP TYPE test_type_exists;
+
+DROP TYPE IF EXISTS test_type_exists;
+
+CREATE type test_type_exists as (a int, b text);
+
+DROP TYPE IF EXISTS test_type_exists;
+
+DROP TYPE test_type_exists;
+
+-- domain
+
+DROP DOMAIN test_domain_exists;
+
+DROP DOMAIN IF EXISTS test_domain_exists;
+
+CREATE domain test_domain_exists as int not null check (value > 0);
+
+DROP DOMAIN IF EXISTS test_domain_exists;
+
+DROP DOMAIN test_domain_exists;
+
+-- drop the table
+
+
+DROP TABLE IF EXISTS test_exists;
+
+DROP TABLE test_exists;
+