postgresql/src/test/modules/test_extensions/sql/test_extensions.sql

-- test some errors
CREATE EXTENSION test_ext1;
CREATE EXTENSION test_ext1 SCHEMA test_ext1;
CREATE EXTENSION test_ext1 SCHEMA test_ext;
CREATE SCHEMA test_ext;
CREATE EXTENSION test_ext1 SCHEMA test_ext;

-- finally success
CREATE EXTENSION test_ext1 SCHEMA test_ext CASCADE;

SELECT extname, nspname, extversion, extrelocatable FROM pg_extension e, pg_namespace n WHERE extname LIKE 'test_ext%' AND e.extnamespace = n.oid ORDER BY 1;

CREATE EXTENSION test_ext_cyclic1 CASCADE;

DROP SCHEMA test_ext CASCADE;

CREATE EXTENSION test_ext6;
DROP EXTENSION test_ext6;
CREATE EXTENSION test_ext6;

-- test dropping of member tables that own extensions:
-- this table will be absorbed into test_ext7
create table old_table1 (col1 serial primary key);
create extension test_ext7;
\dx+ test_ext7
alter extension test_ext7 update to '2.0';
\dx+ test_ext7