-- predictability
SET synchronous_commit = on;
DROP TABLE IF EXISTS replication_example;
-- Ensure there's tables with toast datums.  To do so, we dynamically
-- create a function returning a large textblob.  We want tables of
-- different kinds: mapped catalog table, unmapped catalog table,
-- shared catalog table and usertable.
CREATE FUNCTION exec(text) returns void language plpgsql volatile
  AS $f$
    BEGIN
      EXECUTE $1;
    END;
$f$;
CREATE ROLE regress_justforcomments NOLOGIN;
SELECT exec(
    format($outer$CREATE FUNCTION iamalongfunction() RETURNS TEXT IMMUTABLE LANGUAGE SQL AS $f$SELECT text %L$f$$outer$,
           (SELECT repeat(string_agg(to_char(g.i, 'FM0000'), ''), 50) FROM generate_series(1, 500) g(i))));
 exec 
------
 
(1 row)

SELECT exec(
    format($outer$COMMENT ON FUNCTION iamalongfunction() IS %L$outer$,
           iamalongfunction()));
 exec 
------
 
(1 row)

SELECT exec(
    format($outer$COMMENT ON ROLE REGRESS_JUSTFORCOMMENTS IS %L$outer$,
           iamalongfunction()));
 exec 
------
 
(1 row)

CREATE TABLE iamalargetable AS SELECT iamalongfunction() longfunctionoutput;
-- verify toast usage
SELECT pg_relation_size((SELECT reltoastrelid FROM pg_class WHERE oid = 'pg_proc'::regclass)) > 0;
 ?column? 
----------
 t
(1 row)

SELECT pg_relation_size((SELECT reltoastrelid FROM pg_class WHERE oid = 'pg_description'::regclass)) > 0;
 ?column? 
----------
 t
(1 row)

SELECT pg_relation_size((SELECT reltoastrelid FROM pg_class WHERE oid = 'pg_shdescription'::regclass)) > 0;
 ?column? 
----------
 t
(1 row)

SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
 ?column? 
----------
 init
(1 row)

CREATE TABLE replication_example(id SERIAL PRIMARY KEY, somedata int, text varchar(120));
INSERT INTO replication_example(somedata) VALUES (1);
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
                                                   data                                                   
----------------------------------------------------------------------------------------------------------
 BEGIN
 table public.replication_example: INSERT: id[integer]:1 somedata[integer]:1 text[character varying]:null
 COMMIT
(3 rows)

BEGIN;
INSERT INTO replication_example(somedata) VALUES (2);
ALTER TABLE replication_example ADD COLUMN testcolumn1 int;
INSERT INTO replication_example(somedata, testcolumn1) VALUES (3,  1);
COMMIT;
BEGIN;
INSERT INTO replication_example(somedata) VALUES (3);
ALTER TABLE replication_example ADD COLUMN testcolumn2 int;
INSERT INTO replication_example(somedata, testcolumn1, testcolumn2) VALUES (4,  2, 1);
COMMIT;
VACUUM FULL pg_am;
VACUUM FULL pg_amop;
VACUUM FULL pg_proc;
VACUUM FULL pg_opclass;
VACUUM FULL pg_type;
VACUUM FULL pg_index;
VACUUM FULL pg_database;
-- repeated rewrites that fail
BEGIN;
CLUSTER pg_class USING pg_class_oid_index;
CLUSTER pg_class USING pg_class_oid_index;
ROLLBACK;
-- repeated rewrites that succeed
BEGIN;
CLUSTER pg_class USING pg_class_oid_index;
CLUSTER pg_class USING pg_class_oid_index;
CLUSTER pg_class USING pg_class_oid_index;
COMMIT;
 -- repeated rewrites in different transactions
VACUUM FULL pg_class;
VACUUM FULL pg_class;
-- reindexing of important relations / indexes
REINDEX TABLE pg_class;
REINDEX INDEX pg_class_oid_index;
REINDEX INDEX pg_class_tblspc_relfilenode_index;
INSERT INTO replication_example(somedata, testcolumn1) VALUES (5, 3);
BEGIN;
INSERT INTO replication_example(somedata, testcolumn1) VALUES (6, 4);
ALTER TABLE replication_example ADD COLUMN testcolumn3 int;
INSERT INTO replication_example(somedata, testcolumn1, testcolumn3) VALUES (7, 5, 1);
COMMIT;
-- make old files go away
CHECKPOINT;
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
                                                                                       data                                                                                       
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 BEGIN
 table public.replication_example: INSERT: id[integer]:2 somedata[integer]:2 text[character varying]:null
 table public.replication_example: INSERT: id[integer]:3 somedata[integer]:3 text[character varying]:null testcolumn1[integer]:1
 COMMIT
 BEGIN
 table public.replication_example: INSERT: id[integer]:4 somedata[integer]:3 text[character varying]:null testcolumn1[integer]:null
 table public.replication_example: INSERT: id[integer]:5 somedata[integer]:4 text[character varying]:null testcolumn1[integer]:2 testcolumn2[integer]:1
 COMMIT
 BEGIN
 table public.replication_example: INSERT: id[integer]:6 somedata[integer]:5 text[character varying]:null testcolumn1[integer]:3 testcolumn2[integer]:null
 COMMIT
 BEGIN
 table public.replication_example: INSERT: id[integer]:7 somedata[integer]:6 text[character varying]:null testcolumn1[integer]:4 testcolumn2[integer]:null
 table public.replication_example: INSERT: id[integer]:8 somedata[integer]:7 text[character varying]:null testcolumn1[integer]:5 testcolumn2[integer]:null testcolumn3[integer]:1
 COMMIT
(15 rows)

-- trigger repeated rewrites of a system catalog with a toast table,
-- that previously was buggy: 20180914021046.oi7dm4ra3ot2g2kt@alap3.anarazel.de
VACUUM FULL pg_proc; VACUUM FULL pg_description; VACUUM FULL pg_shdescription; VACUUM FULL iamalargetable;
INSERT INTO replication_example(somedata, testcolumn1, testcolumn3) VALUES (8, 6, 1);
VACUUM FULL pg_proc; VACUUM FULL pg_description; VACUUM FULL pg_shdescription; VACUUM FULL iamalargetable;
INSERT INTO replication_example(somedata, testcolumn1, testcolumn3) VALUES (9, 7, 1);
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
                                                                                       data                                                                                        
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 BEGIN
 table public.replication_example: INSERT: id[integer]:9 somedata[integer]:8 text[character varying]:null testcolumn1[integer]:6 testcolumn2[integer]:null testcolumn3[integer]:1
 COMMIT
 BEGIN
 table public.replication_example: INSERT: id[integer]:10 somedata[integer]:9 text[character varying]:null testcolumn1[integer]:7 testcolumn2[integer]:null testcolumn3[integer]:1
 COMMIT
(6 rows)

SELECT pg_drop_replication_slot('regression_slot');
 pg_drop_replication_slot 
--------------------------
 
(1 row)

DROP TABLE IF EXISTS replication_example;
DROP FUNCTION iamalongfunction();
DROP FUNCTION exec(text);
DROP ROLE regress_justforcomments;