Parsed test spec with 2 sessions

starting permutation: s2b s1l s2u s2_blocker1 s2_unlock s2c
pg_advisory_lock

               
step s2b: BEGIN;
step s1l: SELECT * FROM foo WHERE pg_advisory_xact_lock(0) IS NOT NULL AND key = 1 FOR KEY SHARE; <waiting ...>
step s2u: UPDATE foo SET value = 2 WHERE key = 1;
step s2_blocker1: DELETE FROM foo;
step s2_unlock: SELECT pg_advisory_unlock(0);
pg_advisory_unlock

t              
step s2c: COMMIT;
step s1l: <... completed>
error in steps s2c s1l: ERROR:  could not serialize access due to concurrent update

starting permutation: s2b s1l s2u s2_blocker2 s2_unlock s2c
pg_advisory_lock

               
step s2b: BEGIN;
step s1l: SELECT * FROM foo WHERE pg_advisory_xact_lock(0) IS NOT NULL AND key = 1 FOR KEY SHARE; <waiting ...>
step s2u: UPDATE foo SET value = 2 WHERE key = 1;
step s2_blocker2: UPDATE foo SET key = 2 WHERE key = 1;
step s2_unlock: SELECT pg_advisory_unlock(0);
pg_advisory_unlock

t              
step s2c: COMMIT;
step s1l: <... completed>
error in steps s2c s1l: ERROR:  could not serialize access due to concurrent update

starting permutation: s2b s1l s2u s2_blocker3 s2_unlock s2c
pg_advisory_lock

               
step s2b: BEGIN;
step s1l: SELECT * FROM foo WHERE pg_advisory_xact_lock(0) IS NOT NULL AND key = 1 FOR KEY SHARE; <waiting ...>
step s2u: UPDATE foo SET value = 2 WHERE key = 1;
step s2_blocker3: UPDATE foo SET value = 2 WHERE key = 1;
step s2_unlock: SELECT pg_advisory_unlock(0);
pg_advisory_unlock

t              
step s1l: <... completed>
key            value          

1              1              
step s2c: COMMIT;

starting permutation: s2b s1l s2u s2_blocker1 s2_unlock s2r
pg_advisory_lock

               
step s2b: BEGIN;
step s1l: SELECT * FROM foo WHERE pg_advisory_xact_lock(0) IS NOT NULL AND key = 1 FOR KEY SHARE; <waiting ...>
step s2u: UPDATE foo SET value = 2 WHERE key = 1;
step s2_blocker1: DELETE FROM foo;
step s2_unlock: SELECT pg_advisory_unlock(0);
pg_advisory_unlock

t              
step s2r: ROLLBACK;
step s1l: <... completed>
key            value          

1              1              

starting permutation: s2b s1l s2u s2_blocker2 s2_unlock s2r
pg_advisory_lock

               
step s2b: BEGIN;
step s1l: SELECT * FROM foo WHERE pg_advisory_xact_lock(0) IS NOT NULL AND key = 1 FOR KEY SHARE; <waiting ...>
step s2u: UPDATE foo SET value = 2 WHERE key = 1;
step s2_blocker2: UPDATE foo SET key = 2 WHERE key = 1;
step s2_unlock: SELECT pg_advisory_unlock(0);
pg_advisory_unlock

t              
step s2r: ROLLBACK;
step s1l: <... completed>
key            value          

1              1              

starting permutation: s2b s1l s2u s2_blocker3 s2_unlock s2r
pg_advisory_lock

               
step s2b: BEGIN;
step s1l: SELECT * FROM foo WHERE pg_advisory_xact_lock(0) IS NOT NULL AND key = 1 FOR KEY SHARE; <waiting ...>
step s2u: UPDATE foo SET value = 2 WHERE key = 1;
step s2_blocker3: UPDATE foo SET value = 2 WHERE key = 1;
step s2_unlock: SELECT pg_advisory_unlock(0);
pg_advisory_unlock

t              
step s1l: <... completed>
key            value          

1              1              
step s2r: ROLLBACK;

starting permutation: s2b s1l s2u s2_blocker1 s2c s2_unlock
pg_advisory_lock

               
step s2b: BEGIN;
step s1l: SELECT * FROM foo WHERE pg_advisory_xact_lock(0) IS NOT NULL AND key = 1 FOR KEY SHARE; <waiting ...>
step s2u: UPDATE foo SET value = 2 WHERE key = 1;
step s2_blocker1: DELETE FROM foo;
step s2c: COMMIT;
step s2_unlock: SELECT pg_advisory_unlock(0);
pg_advisory_unlock

t              
step s1l: <... completed>
error in steps s2_unlock s1l: ERROR:  could not serialize access due to concurrent update

starting permutation: s2b s1l s2u s2_blocker2 s2c s2_unlock
pg_advisory_lock

               
step s2b: BEGIN;
step s1l: SELECT * FROM foo WHERE pg_advisory_xact_lock(0) IS NOT NULL AND key = 1 FOR KEY SHARE; <waiting ...>
step s2u: UPDATE foo SET value = 2 WHERE key = 1;
step s2_blocker2: UPDATE foo SET key = 2 WHERE key = 1;
step s2c: COMMIT;
step s2_unlock: SELECT pg_advisory_unlock(0);
pg_advisory_unlock

t              
step s1l: <... completed>
error in steps s2_unlock s1l: ERROR:  could not serialize access due to concurrent update

starting permutation: s2b s1l s2u s2_blocker3 s2c s2_unlock
pg_advisory_lock

               
step s2b: BEGIN;
step s1l: SELECT * FROM foo WHERE pg_advisory_xact_lock(0) IS NOT NULL AND key = 1 FOR KEY SHARE; <waiting ...>
step s2u: UPDATE foo SET value = 2 WHERE key = 1;
step s2_blocker3: UPDATE foo SET value = 2 WHERE key = 1;
step s2c: COMMIT;
step s2_unlock: SELECT pg_advisory_unlock(0);
pg_advisory_unlock

t              
step s1l: <... completed>
error in steps s2_unlock s1l: ERROR:  could not serialize access due to concurrent update

starting permutation: s2b s1l s2u s2_blocker1 s2r s2_unlock
pg_advisory_lock

               
step s2b: BEGIN;
step s1l: SELECT * FROM foo WHERE pg_advisory_xact_lock(0) IS NOT NULL AND key = 1 FOR KEY SHARE; <waiting ...>
step s2u: UPDATE foo SET value = 2 WHERE key = 1;
step s2_blocker1: DELETE FROM foo;
step s2r: ROLLBACK;
step s2_unlock: SELECT pg_advisory_unlock(0);
pg_advisory_unlock

t              
step s1l: <... completed>
key            value          

1              1              

starting permutation: s2b s1l s2u s2_blocker2 s2r s2_unlock
pg_advisory_lock

               
step s2b: BEGIN;
step s1l: SELECT * FROM foo WHERE pg_advisory_xact_lock(0) IS NOT NULL AND key = 1 FOR KEY SHARE; <waiting ...>
step s2u: UPDATE foo SET value = 2 WHERE key = 1;
step s2_blocker2: UPDATE foo SET key = 2 WHERE key = 1;
step s2r: ROLLBACK;
step s2_unlock: SELECT pg_advisory_unlock(0);
pg_advisory_unlock

t              
step s1l: <... completed>
key            value          

1              1              

starting permutation: s2b s1l s2u s2_blocker3 s2r s2_unlock
pg_advisory_lock

               
step s2b: BEGIN;
step s1l: SELECT * FROM foo WHERE pg_advisory_xact_lock(0) IS NOT NULL AND key = 1 FOR KEY SHARE; <waiting ...>
step s2u: UPDATE foo SET value = 2 WHERE key = 1;
step s2_blocker3: UPDATE foo SET value = 2 WHERE key = 1;
step s2r: ROLLBACK;
step s2_unlock: SELECT pg_advisory_unlock(0);
pg_advisory_unlock

t              
step s1l: <... completed>
key            value          

1              1