165 lines
6.8 KiB
Plaintext
165 lines
6.8 KiB
Plaintext
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-- predictability
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SET synchronous_commit = on;
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DROP TABLE IF EXISTS replication_example;
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-- Ensure there's tables with toast datums. To do so, we dynamically
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-- create a function returning a large textblob. We want tables of
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-- different kinds: mapped catalog table, unmapped catalog table,
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-- shared catalog table and usertable.
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CREATE FUNCTION exec(text) returns void language plpgsql volatile
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AS $f$
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BEGIN
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EXECUTE $1;
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END;
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$f$;
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CREATE ROLE regress_justforcomments NOLOGIN;
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SELECT exec(
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format($outer$CREATE FUNCTION iamalongfunction() RETURNS TEXT IMMUTABLE LANGUAGE SQL AS $f$SELECT text %L$f$$outer$,
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(SELECT repeat(string_agg(to_char(g.i, 'FM0000'), ''), 50) FROM generate_series(1, 500) g(i))));
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exec
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------
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(1 row)
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SELECT exec(
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format($outer$COMMENT ON FUNCTION iamalongfunction() IS %L$outer$,
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iamalongfunction()));
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exec
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------
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(1 row)
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SELECT exec(
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format($outer$COMMENT ON ROLE REGRESS_JUSTFORCOMMENTS IS %L$outer$,
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iamalongfunction()));
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exec
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------
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(1 row)
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CREATE TABLE iamalargetable AS SELECT iamalongfunction() longfunctionoutput;
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-- verify toast usage
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SELECT pg_relation_size((SELECT reltoastrelid FROM pg_class WHERE oid = 'pg_proc'::regclass)) > 0;
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?column?
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----------
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t
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(1 row)
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SELECT pg_relation_size((SELECT reltoastrelid FROM pg_class WHERE oid = 'pg_description'::regclass)) > 0;
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?column?
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----------
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t
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(1 row)
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SELECT pg_relation_size((SELECT reltoastrelid FROM pg_class WHERE oid = 'pg_shdescription'::regclass)) > 0;
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?column?
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----------
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t
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(1 row)
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SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
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?column?
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----------
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init
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(1 row)
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CREATE TABLE replication_example(id SERIAL PRIMARY KEY, somedata int, text varchar(120));
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INSERT INTO replication_example(somedata) VALUES (1);
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SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
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data
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----------------------------------------------------------------------------------------------------------
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BEGIN
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table public.replication_example: INSERT: id[integer]:1 somedata[integer]:1 text[character varying]:null
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COMMIT
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(3 rows)
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BEGIN;
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INSERT INTO replication_example(somedata) VALUES (2);
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ALTER TABLE replication_example ADD COLUMN testcolumn1 int;
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INSERT INTO replication_example(somedata, testcolumn1) VALUES (3, 1);
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COMMIT;
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BEGIN;
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INSERT INTO replication_example(somedata) VALUES (3);
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ALTER TABLE replication_example ADD COLUMN testcolumn2 int;
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INSERT INTO replication_example(somedata, testcolumn1, testcolumn2) VALUES (4, 2, 1);
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COMMIT;
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VACUUM FULL pg_am;
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VACUUM FULL pg_amop;
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VACUUM FULL pg_proc;
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VACUUM FULL pg_opclass;
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VACUUM FULL pg_type;
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VACUUM FULL pg_index;
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VACUUM FULL pg_database;
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-- repeated rewrites that fail
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BEGIN;
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CLUSTER pg_class USING pg_class_oid_index;
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CLUSTER pg_class USING pg_class_oid_index;
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ROLLBACK;
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-- repeated rewrites that succeed
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BEGIN;
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CLUSTER pg_class USING pg_class_oid_index;
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CLUSTER pg_class USING pg_class_oid_index;
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CLUSTER pg_class USING pg_class_oid_index;
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COMMIT;
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-- repeated rewrites in different transactions
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VACUUM FULL pg_class;
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VACUUM FULL pg_class;
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-- reindexing of important relations / indexes
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REINDEX TABLE pg_class;
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REINDEX INDEX pg_class_oid_index;
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REINDEX INDEX pg_class_tblspc_relfilenode_index;
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INSERT INTO replication_example(somedata, testcolumn1) VALUES (5, 3);
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BEGIN;
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INSERT INTO replication_example(somedata, testcolumn1) VALUES (6, 4);
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ALTER TABLE replication_example ADD COLUMN testcolumn3 int;
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INSERT INTO replication_example(somedata, testcolumn1, testcolumn3) VALUES (7, 5, 1);
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COMMIT;
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-- make old files go away
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CHECKPOINT;
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SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
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data
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----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
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BEGIN
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table public.replication_example: INSERT: id[integer]:2 somedata[integer]:2 text[character varying]:null
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table public.replication_example: INSERT: id[integer]:3 somedata[integer]:3 text[character varying]:null testcolumn1[integer]:1
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COMMIT
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BEGIN
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table public.replication_example: INSERT: id[integer]:4 somedata[integer]:3 text[character varying]:null testcolumn1[integer]:null
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table public.replication_example: INSERT: id[integer]:5 somedata[integer]:4 text[character varying]:null testcolumn1[integer]:2 testcolumn2[integer]:1
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COMMIT
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BEGIN
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table public.replication_example: INSERT: id[integer]:6 somedata[integer]:5 text[character varying]:null testcolumn1[integer]:3 testcolumn2[integer]:null
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COMMIT
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BEGIN
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table public.replication_example: INSERT: id[integer]:7 somedata[integer]:6 text[character varying]:null testcolumn1[integer]:4 testcolumn2[integer]:null
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table public.replication_example: INSERT: id[integer]:8 somedata[integer]:7 text[character varying]:null testcolumn1[integer]:5 testcolumn2[integer]:null testcolumn3[integer]:1
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COMMIT
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(15 rows)
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-- trigger repeated rewrites of a system catalog with a toast table,
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-- that previously was buggy: 20180914021046.oi7dm4ra3ot2g2kt@alap3.anarazel.de
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VACUUM FULL pg_proc; VACUUM FULL pg_description; VACUUM FULL pg_shdescription; VACUUM FULL iamalargetable;
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INSERT INTO replication_example(somedata, testcolumn1, testcolumn3) VALUES (8, 6, 1);
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VACUUM FULL pg_proc; VACUUM FULL pg_description; VACUUM FULL pg_shdescription; VACUUM FULL iamalargetable;
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INSERT INTO replication_example(somedata, testcolumn1, testcolumn3) VALUES (9, 7, 1);
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SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
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data
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-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
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BEGIN
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table public.replication_example: INSERT: id[integer]:9 somedata[integer]:8 text[character varying]:null testcolumn1[integer]:6 testcolumn2[integer]:null testcolumn3[integer]:1
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COMMIT
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BEGIN
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table public.replication_example: INSERT: id[integer]:10 somedata[integer]:9 text[character varying]:null testcolumn1[integer]:7 testcolumn2[integer]:null testcolumn3[integer]:1
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COMMIT
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(6 rows)
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SELECT pg_drop_replication_slot('regression_slot');
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pg_drop_replication_slot
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--------------------------
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(1 row)
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DROP TABLE IF EXISTS replication_example;
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DROP FUNCTION iamalongfunction();
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DROP FUNCTION exec(text);
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DROP ROLE regress_justforcomments;
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