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Parsed test spec with 3 sessions

starting permutation: s0init s0start s1begin s1sharepgclass s2begin s2sharepgclass s0w s0start s2commit s1commit
step s0init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
?column?
--------
init    
(1 row)

step s0start: SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', 'false');
data
----
(0 rows)

step s1begin: BEGIN;
step s1sharepgclass: SELECT count(*) > 1 FROM (SELECT * FROM pg_class FOR SHARE) s;
?column?
--------
t       
(1 row)

step s2begin: BEGIN;
step s2sharepgclass: SELECT count(*) > 1 FROM (SELECT * FROM pg_class FOR SHARE) s;
?column?
--------
t       
(1 row)

step s0w: INSERT INTO do_write DEFAULT VALUES;
step s0start: SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', 'false');
data                                        
--------------------------------------------
BEGIN                                       
table public.do_write: INSERT: id[integer]:1
COMMIT                                      
(3 rows)

step s2commit: COMMIT;
step s1commit: COMMIT;
?column?
--------
stop    
(1 row)


starting permutation: s0init s0start s1begin s1keysharepgclass s2begin s2keysharepgclass s0alter s0w s0start s2commit s1commit
step s0init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
?column?
--------
init    
(1 row)

step s0start: SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', 'false');
data
----
(0 rows)

step s1begin: BEGIN;
step s1keysharepgclass: SELECT count(*) > 1 FROM (SELECT * FROM pg_class FOR KEY SHARE) s;
?column?
--------
t       
(1 row)

step s2begin: BEGIN;
step s2keysharepgclass: SELECT count(*) > 1 FROM (SELECT * FROM pg_class FOR KEY SHARE) s;
?column?
--------
t       
(1 row)

step s0alter: ALTER TABLE do_write ADD column ts timestamptz;
step s0w: INSERT INTO do_write DEFAULT VALUES;
step s0start: SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', 'false');
data                                                                          
------------------------------------------------------------------------------
BEGIN                                                                         
COMMIT                                                                        
BEGIN                                                                         
table public.do_write: INSERT: id[integer]:1 ts[timestamp with time zone]:null
COMMIT                                                                        
(5 rows)

step s2commit: COMMIT;
step s1commit: COMMIT;
?column?
--------
stop    
(1 row)