CREATE EXTENSION postgis;
CREATE EXTENSION schema_triggers;
CREATE EXTENSION cartodb;

set search_path to public,cartodb,schema_triggers;

--set client_min_messages to debug;

-- Create a stub cdb_invalidate_varnish function if not available
--CREATE FUNCTION tmp() returns void AS $$
DO $$
BEGIN
  PERFORM cdb_invalidate_varnish(0);
EXCEPTION
  WHEN undefined_function THEN
    CREATE OR REPLACE FUNCTION cartodb.cdb_invalidate_varnish(tabname text)
    RETURNS void AS '' LANGUAGE 'sql';
END;
$$ LANGUAGE 'plpgsql';

--SELECT tmp();


create schema c;

CREATE USER cartodb_postgresql_unpriv_user;
GRANT ALL ON SCHEMA c to cartodb_postgresql_unpriv_user;
SET SESSION AUTHORIZATION 'cartodb_postgresql_unpriv_user';
--SELECT session_user, current_user;

----------------------
-- CREATE TABLE
----------------------

select 1 as i INTO c.t3;

select
 cartodb_id, created_at=updated_at as "c=u",
 NOW() - updated_at < '1 secs' as "u<1s",
 the_geom, the_geom_webmercator,
 i
from c.t3;

select
 tabname::text,
 round(extract('secs' from now()  - updated_at)) as age
FROM CDB_TableMetadata;

----------------------------
-- ALTER TABLE RENAME COLUMN
----------------------------

select pg_sleep(1);
alter table c.t3 rename column the_geom_webmercator to webmerc;

select
 cartodb_id, created_at=updated_at as "c=u",
 NOW() - updated_at < '1 secs' as "u<1s",
 the_geom, the_geom_webmercator,
 i, webmerc
from c.t3;

select
 tabname::text,
 round(extract('secs' from now()  - updated_at)) as age
FROM CDB_TableMetadata;

select pg_sleep(1);
alter table c.t3 rename column the_geom_webmercator to webmerc2;

select
 cartodb_id, created_at=updated_at as "c=u",
 NOW() - updated_at < '1 secs' as "u<1s",
 the_geom, the_geom_webmercator,
 i, webmerc, webmerc2
from c.t3;

select
 tabname::text,
 round(extract('secs' from now()  - updated_at)) as age
FROM CDB_TableMetadata;

----------------------------
-- ALTER TABLE DROP COLUMN
----------------------------

select pg_sleep(1);
alter table c.t3 drop column the_geom_webmercator;

select
 cartodb_id, created_at=updated_at as "c=u",
 NOW() - updated_at < '1 secs' as "u<1s",
 the_geom, the_geom_webmercator,
 i, webmerc, webmerc2
from c.t3;

select
 tabname::text,
 round(extract('secs' from now()  - updated_at)) as age
FROM CDB_TableMetadata;

----------------------------
-- ALTER TABLE ADD COLUMN
----------------------------

select pg_sleep(1);
alter table c.t3 add column id2 int;

select
 cartodb_id, created_at=updated_at as "c=u",
 NOW() - updated_at < '1 secs' as "u<1s",
 the_geom, the_geom_webmercator,
 i, webmerc, webmerc2, id2
from c.t3;

select
 tabname::text,
 round(extract('secs' from now()  - updated_at)) as age
FROM CDB_TableMetadata;

----------------------------
-- DROP TABLE
----------------------------

RESET SESSION AUTHORIZATION;
drop schema c cascade;
select count(*) from CDB_TableMetadata; 

DROP USER cartodb_postgresql_unpriv_user;