----
-- Regression test to Global Temporary Table implementation
--
-- Test for GTT with TABLE ... AS clause.
--
----
-- Import the library
LOAD 'pgtt';
-- Create a GTT like table to test ON COMMIT PRESERVE ROWS
CREATE GLOBAL TEMPORARY TABLE t_glob_temptable1 AS SELECT * FROM source WITH DATA;
WARNING:  GLOBAL is deprecated in temporary table creation
LINE 1: CREATE GLOBAL TEMPORARY TABLE t_glob_temptable1 AS SELECT * ...
               ^
-- Look at Global Temporary Table definition
SELECT nspname, relname, preserved, code FROM pgtt_schema.pg_global_temp_tables;
   nspname   |      relname      | preserved |           code            
-------------+-------------------+-----------+---------------------------
 pgtt_schema | t_glob_temptable1 | t         |  AS SELECT * FROM source 
(1 row)

-- A "template" unlogged table should exists as well as
-- the temporary table as we have used WITH DATA
SELECT regexp_replace(n.nspname, '\d+', 'x', 'g'), c.relname FROM pg_class c JOIN pg_namespace n ON (c.relnamespace=n.oid) WHERE relname = 't_glob_temptable1';
 regexp_replace |      relname      
----------------+-------------------
 pgtt_schema    | t_glob_temptable1
 pg_temp_x      | t_glob_temptable1
(2 rows)

-- Look at content of the template for Global Temporary Table, must be empty
SET pgtt.enabled TO off;
SELECT * FROM pgtt_schema.t_glob_temptable1;
 id |  c2   | lbl 
----+-------+-----
  1 | one   | -
  2 | two   | -
  3 | three | -
(3 rows)

SET pgtt.enabled TO on;
-- Look at the temporary table itself, it must have the rows
SELECT * FROM t_glob_temptable1 ORDER BY id;
 id |  c2   | lbl 
----+-------+-----
  1 | one   | -
  2 | two   | -
  3 | three | -
(3 rows)

BEGIN;
-- With a new row
INSERT INTO t_glob_temptable1 VALUES (4, 'four');
-- Look at content of the template for Global Temporary Table, must be empty
SET pgtt.enabled TO off;
SELECT * FROM pgtt_schema.t_glob_temptable1;
 id |  c2   | lbl 
----+-------+-----
  1 | one   | -
  2 | two   | -
  3 | three | -
(3 rows)

SET pgtt.enabled TO on;
-- Look at content of the Global Temporary Table
SELECT * FROM t_glob_temptable1 ORDER BY id;
 id |  c2   | lbl 
----+-------+-----
  1 | one   | -
  2 | two   | -
  3 | three | -
  4 | four  | 
(4 rows)

COMMIT;
SELECT * FROM t_glob_temptable1 ORDER BY id;
 id |  c2   | lbl 
----+-------+-----
  1 | one   | -
  2 | two   | -
  3 | three | -
  4 | four  | 
(4 rows)

-- Reconnect and drop it
\c - -
LOAD 'pgtt';
-- Cleanup
DROP TABLE t_glob_temptable1;