Add new test files for lock level patch

3 files changed, 2757 insertions, 0 deletions

diff --git a/src/test/isolation/expected/alter-table-2.out b/src/test/isolation/expected/alter-table-2.out
new file mode 100644
index 0000000000..cef7516ca9
--- /dev/null
+++ b/src/test/isolation/expected/alter-table-2.out
@@ -0,0 +1,1389 @@
+Parsed test spec with 2 sessions
+
+starting permutation: s1a s1b s1c s2a s2b s2c s2d s2e s2f
+step s1a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s1c: COMMIT;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+
+starting permutation: s1a s1b s2a s1c s2b s2c s2d s2e s2f
+step s1a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2a: BEGIN;
+step s1c: COMMIT;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+
+starting permutation: s1a s1b s2a s2b s1c s2c s2d s2e s2f
+step s1a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1c: COMMIT;
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+
+starting permutation: s1a s1b s2a s2b s2c s1c s2d s2e s2f
+step s1a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s1c: COMMIT;
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+
+starting permutation: s1a s1b s2a s2b s2c s2d s1c s2e s2f
+step s1a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0); <waiting ...>
+step s1c: COMMIT;
+step s2d: <... completed>
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+
+starting permutation: s1a s1b s2a s2b s2c s2d s2e s1c s2f
+step s1a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s1a s1b s2a s2b s2c s2d s2e s2f s1c
+step s1a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s1a s2a s1b s1c s2b s2c s2d s2e s2f
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s1c: COMMIT;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+
+starting permutation: s1a s2a s1b s2b s1c s2c s2d s2e s2f
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1c: COMMIT;
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+
+starting permutation: s1a s2a s1b s2b s2c s1c s2d s2e s2f
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s1c: COMMIT;
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+
+starting permutation: s1a s2a s1b s2b s2c s2d s1c s2e s2f
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0); <waiting ...>
+step s1c: COMMIT;
+step s2d: <... completed>
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+
+starting permutation: s1a s2a s1b s2b s2c s2d s2e s1c s2f
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s1a s2a s1b s2b s2c s2d s2e s2f s1c
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s1a s2a s2b s1b s1c s2c s2d s2e s2f
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s1c: COMMIT;
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+
+starting permutation: s1a s2a s2b s1b s2c s1c s2d s2e s2f
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s1c: COMMIT;
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+
+starting permutation: s1a s2a s2b s1b s2c s2d s1c s2e s2f
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0); <waiting ...>
+step s1c: COMMIT;
+step s2d: <... completed>
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+
+starting permutation: s1a s2a s2b s1b s2c s2d s2e s1c s2f
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s1a s2a s2b s1b s2c s2d s2e s2f s1c
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s1a s2a s2b s2c s1b s1c s2d s2e s2f
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s1c: COMMIT;
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+
+starting permutation: s1a s2a s2b s2c s1b s2d s1c s2e s2f
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2d: INSERT INTO b VALUES (0); <waiting ...>
+step s1c: COMMIT;
+step s2d: <... completed>
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+
+starting permutation: s1a s2a s2b s2c s1b s2d s2e s1c s2f
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2d: INSERT INTO b VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s1a s2a s2b s2c s1b s2d s2e s2f s1c
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2d: INSERT INTO b VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s1a s2a s2b s2c s2d s1b s1c s2e s2f
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID; <waiting ...>
+invalid permutation detected
+
+starting permutation: s1a s2a s2b s2c s2d s1b s2e s1c s2f
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID; <waiting ...>
+step s2e: INSERT INTO a VALUES (4);
+invalid permutation detected
+
+starting permutation: s1a s2a s2b s2c s2d s1b s2e s2f s1c
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID; <waiting ...>
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+step s1b: <... completed>
+step s1c: COMMIT;
+
+starting permutation: s1a s2a s2b s2c s2d s2e s1b s1c s2f
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID; <waiting ...>
+invalid permutation detected
+
+starting permutation: s1a s2a s2b s2c s2d s2e s1b s2f s1c
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID; <waiting ...>
+step s2f: COMMIT;
+step s1b: <... completed>
+step s1c: COMMIT;
+
+starting permutation: s1a s2a s2b s2c s2d s2e s2f s1b s1c
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s1c: COMMIT;
+
+starting permutation: s2a s1a s1b s1c s2b s2c s2d s2e s2f
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s1c: COMMIT;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+
+starting permutation: s2a s1a s1b s2b s1c s2c s2d s2e s2f
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1c: COMMIT;
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+
+starting permutation: s2a s1a s1b s2b s2c s1c s2d s2e s2f
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s1c: COMMIT;
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+
+starting permutation: s2a s1a s1b s2b s2c s2d s1c s2e s2f
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0); <waiting ...>
+step s1c: COMMIT;
+step s2d: <... completed>
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+
+starting permutation: s2a s1a s1b s2b s2c s2d s2e s1c s2f
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s1a s1b s2b s2c s2d s2e s2f s1c
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s1a s2b s1b s1c s2c s2d s2e s2f
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s1c: COMMIT;
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+
+starting permutation: s2a s1a s2b s1b s2c s1c s2d s2e s2f
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s1c: COMMIT;
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+
+starting permutation: s2a s1a s2b s1b s2c s2d s1c s2e s2f
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0); <waiting ...>
+step s1c: COMMIT;
+step s2d: <... completed>
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+
+starting permutation: s2a s1a s2b s1b s2c s2d s2e s1c s2f
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s1a s2b s1b s2c s2d s2e s2f s1c
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s1a s2b s2c s1b s1c s2d s2e s2f
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s1c: COMMIT;
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+
+starting permutation: s2a s1a s2b s2c s1b s2d s1c s2e s2f
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2d: INSERT INTO b VALUES (0); <waiting ...>
+step s1c: COMMIT;
+step s2d: <... completed>
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+
+starting permutation: s2a s1a s2b s2c s1b s2d s2e s1c s2f
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2d: INSERT INTO b VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s1a s2b s2c s1b s2d s2e s2f s1c
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2d: INSERT INTO b VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s1a s2b s2c s2d s1b s1c s2e s2f
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID; <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s1a s2b s2c s2d s1b s2e s1c s2f
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID; <waiting ...>
+step s2e: INSERT INTO a VALUES (4);
+invalid permutation detected
+
+starting permutation: s2a s1a s2b s2c s2d s1b s2e s2f s1c
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID; <waiting ...>
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+step s1b: <... completed>
+step s1c: COMMIT;
+
+starting permutation: s2a s1a s2b s2c s2d s2e s1b s1c s2f
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID; <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s1a s2b s2c s2d s2e s1b s2f s1c
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID; <waiting ...>
+step s2f: COMMIT;
+step s1b: <... completed>
+step s1c: COMMIT;
+
+starting permutation: s2a s1a s2b s2c s2d s2e s2f s1b s1c
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s1c: COMMIT;
+
+starting permutation: s2a s2b s1a s1b s1c s2c s2d s2e s2f
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s1c: COMMIT;
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+
+starting permutation: s2a s2b s1a s1b s2c s1c s2d s2e s2f
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s1c: COMMIT;
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+
+starting permutation: s2a s2b s1a s1b s2c s2d s1c s2e s2f
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0); <waiting ...>
+step s1c: COMMIT;
+step s2d: <... completed>
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+
+starting permutation: s2a s2b s1a s1b s2c s2d s2e s1c s2f
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s2b s1a s1b s2c s2d s2e s2f s1c
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s2b s1a s2c s1b s1c s2d s2e s2f
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1a: BEGIN;
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s1c: COMMIT;
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+
+starting permutation: s2a s2b s1a s2c s1b s2d s1c s2e s2f
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1a: BEGIN;
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2d: INSERT INTO b VALUES (0); <waiting ...>
+step s1c: COMMIT;
+step s2d: <... completed>
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+
+starting permutation: s2a s2b s1a s2c s1b s2d s2e s1c s2f
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1a: BEGIN;
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2d: INSERT INTO b VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s2b s1a s2c s1b s2d s2e s2f s1c
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1a: BEGIN;
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2d: INSERT INTO b VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s2b s1a s2c s2d s1b s1c s2e s2f
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1a: BEGIN;
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID; <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s2b s1a s2c s2d s1b s2e s1c s2f
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1a: BEGIN;
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID; <waiting ...>
+step s2e: INSERT INTO a VALUES (4);
+invalid permutation detected
+
+starting permutation: s2a s2b s1a s2c s2d s1b s2e s2f s1c
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1a: BEGIN;
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID; <waiting ...>
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+step s1b: <... completed>
+step s1c: COMMIT;
+
+starting permutation: s2a s2b s1a s2c s2d s2e s1b s1c s2f
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1a: BEGIN;
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID; <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s2b s1a s2c s2d s2e s1b s2f s1c
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1a: BEGIN;
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID; <waiting ...>
+step s2f: COMMIT;
+step s1b: <... completed>
+step s1c: COMMIT;
+
+starting permutation: s2a s2b s1a s2c s2d s2e s2f s1b s1c
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1a: BEGIN;
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s1c: COMMIT;
+
+starting permutation: s2a s2b s2c s1a s1b s1c s2d s2e s2f
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s1a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s1c: COMMIT;
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+
+starting permutation: s2a s2b s2c s1a s1b s2d s1c s2e s2f
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s1a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2d: INSERT INTO b VALUES (0); <waiting ...>
+step s1c: COMMIT;
+step s2d: <... completed>
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+
+starting permutation: s2a s2b s2c s1a s1b s2d s2e s1c s2f
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s1a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2d: INSERT INTO b VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s2b s2c s1a s1b s2d s2e s2f s1c
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s1a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s2d: INSERT INTO b VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s2b s2c s1a s2d s1b s1c s2e s2f
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s1a: BEGIN;
+step s2d: INSERT INTO b VALUES (0);
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID; <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s2b s2c s1a s2d s1b s2e s1c s2f
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s1a: BEGIN;
+step s2d: INSERT INTO b VALUES (0);
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID; <waiting ...>
+step s2e: INSERT INTO a VALUES (4);
+invalid permutation detected
+
+starting permutation: s2a s2b s2c s1a s2d s1b s2e s2f s1c
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s1a: BEGIN;
+step s2d: INSERT INTO b VALUES (0);
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID; <waiting ...>
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+step s1b: <... completed>
+step s1c: COMMIT;
+
+starting permutation: s2a s2b s2c s1a s2d s2e s1b s1c s2f
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s1a: BEGIN;
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID; <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s2b s2c s1a s2d s2e s1b s2f s1c
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s1a: BEGIN;
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID; <waiting ...>
+step s2f: COMMIT;
+step s1b: <... completed>
+step s1c: COMMIT;
+
+starting permutation: s2a s2b s2c s1a s2d s2e s2f s1b s1c
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s1a: BEGIN;
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s1c: COMMIT;
+
+starting permutation: s2a s2b s2c s2d s1a s1b s1c s2e s2f
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s1a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID; <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s2b s2c s2d s1a s1b s2e s1c s2f
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s1a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID; <waiting ...>
+step s2e: INSERT INTO a VALUES (4);
+invalid permutation detected
+
+starting permutation: s2a s2b s2c s2d s1a s1b s2e s2f s1c
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s1a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID; <waiting ...>
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+step s1b: <... completed>
+step s1c: COMMIT;
+
+starting permutation: s2a s2b s2c s2d s1a s2e s1b s1c s2f
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s1a: BEGIN;
+step s2e: INSERT INTO a VALUES (4);
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID; <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s2b s2c s2d s1a s2e s1b s2f s1c
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s1a: BEGIN;
+step s2e: INSERT INTO a VALUES (4);
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID; <waiting ...>
+step s2f: COMMIT;
+step s1b: <... completed>
+step s1c: COMMIT;
+
+starting permutation: s2a s2b s2c s2d s1a s2e s2f s1b s1c
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s1a: BEGIN;
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s1c: COMMIT;
+
+starting permutation: s2a s2b s2c s2d s2e s1a s1b s1c s2f
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s1a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID; <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s2b s2c s2d s2e s1a s1b s2f s1c
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s1a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID; <waiting ...>
+step s2f: COMMIT;
+step s1b: <... completed>
+step s1c: COMMIT;
+
+starting permutation: s2a s2b s2c s2d s2e s1a s2f s1b s1c
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s1a: BEGIN;
+step s2f: COMMIT;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s1c: COMMIT;
+
+starting permutation: s2a s2b s2c s2d s2e s2f s1a s1b s1c
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE;
+a_id           
+
+3              
+step s2d: INSERT INTO b VALUES (0);
+step s2e: INSERT INTO a VALUES (4);
+step s2f: COMMIT;
+step s1a: BEGIN;
+step s1b: ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID;
+step s1c: COMMIT;
diff --git a/src/test/isolation/expected/alter-table-3.out b/src/test/isolation/expected/alter-table-3.out
new file mode 100644
index 0000000000..7dc64df5a1
--- /dev/null
+++ b/src/test/isolation/expected/alter-table-3.out
@@ -0,0 +1,947 @@
+Parsed test spec with 2 sessions
+
+starting permutation: s1a s1b s1c s1d s2a s2b s2c s2d
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s1d: COMMIT;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0);
+ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+
+starting permutation: s1a s1b s1c s2a s1d s2b s2c s2d
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s2a: BEGIN;
+step s1d: COMMIT;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0);
+ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+
+starting permutation: s1a s1b s1c s2a s2b s1d s2c s2d
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1d: COMMIT;
+step s2c: INSERT INTO a VALUES (0);
+ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+
+starting permutation: s1a s1b s1c s2a s2b s2c s1d s2d
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+step s1d: COMMIT;
+step s2c: <... completed>
+error in steps s1d s2c: ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+
+starting permutation: s1a s1b s1c s2a s2b s2c s2d s1d
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s1a s1b s2a s1c s1d s2b s2c s2d
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2a: BEGIN;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s1d: COMMIT;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0);
+ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+
+starting permutation: s1a s1b s2a s1c s2b s1d s2c s2d
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2a: BEGIN;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1d: COMMIT;
+step s2c: INSERT INTO a VALUES (0);
+ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+
+starting permutation: s1a s1b s2a s1c s2b s2c s1d s2d
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2a: BEGIN;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+step s1d: COMMIT;
+step s2c: <... completed>
+error in steps s1d s2c: ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+
+starting permutation: s1a s1b s2a s1c s2b s2c s2d s1d
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2a: BEGIN;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s1a s1b s2a s2b s1c s1d s2c s2d
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s1d: COMMIT;
+step s2c: INSERT INTO a VALUES (0);
+ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+
+starting permutation: s1a s1b s2a s2b s1c s2c s1d s2d
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+step s1d: COMMIT;
+step s2c: <... completed>
+error in steps s1d s2c: ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+
+starting permutation: s1a s1b s2a s2b s1c s2c s2d s1d
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s1a s1b s2a s2b s2c s1c s1d s2d
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s1d: COMMIT;
+step s2c: <... completed>
+error in steps s1d s2c: ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+
+starting permutation: s1a s1b s2a s2b s2c s1c s2d s1d
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+invalid permutation detected
+
+starting permutation: s1a s1b s2a s2b s2c s2d s1c s1d
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s1a s2a s1b s1c s1d s2b s2c s2d
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s1d: COMMIT;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0);
+ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+
+starting permutation: s1a s2a s1b s1c s2b s1d s2c s2d
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1d: COMMIT;
+step s2c: INSERT INTO a VALUES (0);
+ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+
+starting permutation: s1a s2a s1b s1c s2b s2c s1d s2d
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+step s1d: COMMIT;
+step s2c: <... completed>
+error in steps s1d s2c: ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+
+starting permutation: s1a s2a s1b s1c s2b s2c s2d s1d
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s1a s2a s1b s2b s1c s1d s2c s2d
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s1d: COMMIT;
+step s2c: INSERT INTO a VALUES (0);
+ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+
+starting permutation: s1a s2a s1b s2b s1c s2c s1d s2d
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+step s1d: COMMIT;
+step s2c: <... completed>
+error in steps s1d s2c: ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+
+starting permutation: s1a s2a s1b s2b s1c s2c s2d s1d
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s1a s2a s1b s2b s2c s1c s1d s2d
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s1d: COMMIT;
+step s2c: <... completed>
+error in steps s1d s2c: ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+
+starting permutation: s1a s2a s1b s2b s2c s1c s2d s1d
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+invalid permutation detected
+
+starting permutation: s1a s2a s1b s2b s2c s2d s1c s1d
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s1a s2a s2b s1b s1c s1d s2c s2d
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s1d: COMMIT;
+step s2c: INSERT INTO a VALUES (0);
+ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+
+starting permutation: s1a s2a s2b s1b s1c s2c s1d s2d
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+step s1d: COMMIT;
+step s2c: <... completed>
+error in steps s1d s2c: ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+
+starting permutation: s1a s2a s2b s1b s1c s2c s2d s1d
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s1a s2a s2b s1b s2c s1c s1d s2d
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s1d: COMMIT;
+step s2c: <... completed>
+error in steps s1d s2c: ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+
+starting permutation: s1a s2a s2b s1b s2c s1c s2d s1d
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+invalid permutation detected
+
+starting permutation: s1a s2a s2b s1b s2c s2d s1c s1d
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s1a s2a s2b s2c s1b s1c s1d s2d
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0);
+ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s1d: COMMIT;
+step s2d: COMMIT;
+
+starting permutation: s1a s2a s2b s2c s1b s1c s2d s1d
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0);
+ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s2d: COMMIT;
+step s1d: COMMIT;
+
+starting permutation: s1a s2a s2b s2c s1b s2d s1c s1d
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0);
+ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2d: COMMIT;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s1d: COMMIT;
+
+starting permutation: s1a s2a s2b s2c s2d s1b s1c s1d
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0);
+ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s1d: COMMIT;
+
+starting permutation: s2a s1a s1b s1c s1d s2b s2c s2d
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s1d: COMMIT;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0);
+ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+
+starting permutation: s2a s1a s1b s1c s2b s1d s2c s2d
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1d: COMMIT;
+step s2c: INSERT INTO a VALUES (0);
+ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+
+starting permutation: s2a s1a s1b s1c s2b s2c s1d s2d
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+step s1d: COMMIT;
+step s2c: <... completed>
+error in steps s1d s2c: ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+
+starting permutation: s2a s1a s1b s1c s2b s2c s2d s1d
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s1a s1b s2b s1c s1d s2c s2d
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s1d: COMMIT;
+step s2c: INSERT INTO a VALUES (0);
+ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+
+starting permutation: s2a s1a s1b s2b s1c s2c s1d s2d
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+step s1d: COMMIT;
+step s2c: <... completed>
+error in steps s1d s2c: ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+
+starting permutation: s2a s1a s1b s2b s1c s2c s2d s1d
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s1a s1b s2b s2c s1c s1d s2d
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s1d: COMMIT;
+step s2c: <... completed>
+error in steps s1d s2c: ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+
+starting permutation: s2a s1a s1b s2b s2c s1c s2d s1d
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+invalid permutation detected
+
+starting permutation: s2a s1a s1b s2b s2c s2d s1c s1d
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s1a s2b s1b s1c s1d s2c s2d
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s1d: COMMIT;
+step s2c: INSERT INTO a VALUES (0);
+ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+
+starting permutation: s2a s1a s2b s1b s1c s2c s1d s2d
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+step s1d: COMMIT;
+step s2c: <... completed>
+error in steps s1d s2c: ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+
+starting permutation: s2a s1a s2b s1b s1c s2c s2d s1d
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s1a s2b s1b s2c s1c s1d s2d
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s1d: COMMIT;
+step s2c: <... completed>
+error in steps s1d s2c: ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+
+starting permutation: s2a s1a s2b s1b s2c s1c s2d s1d
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+invalid permutation detected
+
+starting permutation: s2a s1a s2b s1b s2c s2d s1c s1d
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s1a s2b s2c s1b s1c s1d s2d
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0);
+ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s1d: COMMIT;
+step s2d: COMMIT;
+
+starting permutation: s2a s1a s2b s2c s1b s1c s2d s1d
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0);
+ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s2d: COMMIT;
+step s1d: COMMIT;
+
+starting permutation: s2a s1a s2b s2c s1b s2d s1c s1d
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0);
+ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2d: COMMIT;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s1d: COMMIT;
+
+starting permutation: s2a s1a s2b s2c s2d s1b s1c s1d
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0);
+ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s1d: COMMIT;
+
+starting permutation: s2a s2b s1a s1b s1c s1d s2c s2d
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s1d: COMMIT;
+step s2c: INSERT INTO a VALUES (0);
+ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+
+starting permutation: s2a s2b s1a s1b s1c s2c s1d s2d
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+step s1d: COMMIT;
+step s2c: <... completed>
+error in steps s1d s2c: ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+
+starting permutation: s2a s2b s1a s1b s1c s2c s2d s1d
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s2b s1a s1b s2c s1c s1d s2d
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s1d: COMMIT;
+step s2c: <... completed>
+error in steps s1d s2c: ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+
+starting permutation: s2a s2b s1a s1b s2c s1c s2d s1d
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+invalid permutation detected
+
+starting permutation: s2a s2b s1a s1b s2c s2d s1c s1d
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2c: INSERT INTO a VALUES (0); <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s2b s1a s2c s1b s1c s1d s2d
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1a: BEGIN;
+step s2c: INSERT INTO a VALUES (0);
+ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s1d: COMMIT;
+step s2d: COMMIT;
+
+starting permutation: s2a s2b s1a s2c s1b s1c s2d s1d
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1a: BEGIN;
+step s2c: INSERT INTO a VALUES (0);
+ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s2d: COMMIT;
+step s1d: COMMIT;
+
+starting permutation: s2a s2b s1a s2c s1b s2d s1c s1d
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1a: BEGIN;
+step s2c: INSERT INTO a VALUES (0);
+ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2d: COMMIT;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s1d: COMMIT;
+
+starting permutation: s2a s2b s1a s2c s2d s1b s1c s1d
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s1a: BEGIN;
+step s2c: INSERT INTO a VALUES (0);
+ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s1d: COMMIT;
+
+starting permutation: s2a s2b s2c s1a s1b s1c s1d s2d
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0);
+ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s1d: COMMIT;
+step s2d: COMMIT;
+
+starting permutation: s2a s2b s2c s1a s1b s1c s2d s1d
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0);
+ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s2d: COMMIT;
+step s1d: COMMIT;
+
+starting permutation: s2a s2b s2c s1a s1b s2d s1c s1d
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0);
+ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s2d: COMMIT;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s1d: COMMIT;
+
+starting permutation: s2a s2b s2c s1a s2d s1b s1c s1d
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0);
+ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s1a: BEGIN;
+step s2d: COMMIT;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s1d: COMMIT;
+
+starting permutation: s2a s2b s2c s2d s1a s1b s1c s1d
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
+i              
+
+1              
+step s2c: INSERT INTO a VALUES (0);
+ERROR:  duplicate key value violates unique constraint "a_pkey"
+step s2d: COMMIT;
+step s1a: BEGIN;
+step s1b: ALTER TABLE a DISABLE TRIGGER t;
+step s1c: ALTER TABLE a ENABLE TRIGGER t;
+step s1d: COMMIT;
diff --git a/src/test/isolation/expected/create-trigger.out b/src/test/isolation/expected/create-trigger.out
new file mode 100644
index 0000000000..e8bb74099f
--- /dev/null
+++ b/src/test/isolation/expected/create-trigger.out
@@ -0,0 +1,421 @@
+Parsed test spec with 2 sessions
+
+starting permutation: s1a s1b s1c s2a s2b s2c s2d
+step s1a: BEGIN;
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f();
+step s1c: COMMIT;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s2c: UPDATE a SET i = 4 WHERE i = 3;
+step s2d: COMMIT;
+
+starting permutation: s1a s1b s2a s1c s2b s2c s2d
+step s1a: BEGIN;
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f();
+step s2a: BEGIN;
+step s1c: COMMIT;
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s2c: UPDATE a SET i = 4 WHERE i = 3;
+step s2d: COMMIT;
+
+starting permutation: s1a s1b s2a s2b s1c s2c s2d
+step s1a: BEGIN;
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f();
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s1c: COMMIT;
+step s2c: UPDATE a SET i = 4 WHERE i = 3;
+step s2d: COMMIT;
+
+starting permutation: s1a s1b s2a s2b s2c s1c s2d
+step s1a: BEGIN;
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f();
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s2c: UPDATE a SET i = 4 WHERE i = 3; <waiting ...>
+step s1c: COMMIT;
+step s2c: <... completed>
+step s2d: COMMIT;
+
+starting permutation: s1a s1b s2a s2b s2c s2d s1c
+step s1a: BEGIN;
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f();
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s2c: UPDATE a SET i = 4 WHERE i = 3; <waiting ...>
+invalid permutation detected
+
+starting permutation: s1a s2a s1b s1c s2b s2c s2d
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f();
+step s1c: COMMIT;
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s2c: UPDATE a SET i = 4 WHERE i = 3;
+step s2d: COMMIT;
+
+starting permutation: s1a s2a s1b s2b s1c s2c s2d
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f();
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s1c: COMMIT;
+step s2c: UPDATE a SET i = 4 WHERE i = 3;
+step s2d: COMMIT;
+
+starting permutation: s1a s2a s1b s2b s2c s1c s2d
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f();
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s2c: UPDATE a SET i = 4 WHERE i = 3; <waiting ...>
+step s1c: COMMIT;
+step s2c: <... completed>
+step s2d: COMMIT;
+
+starting permutation: s1a s2a s1b s2b s2c s2d s1c
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f();
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s2c: UPDATE a SET i = 4 WHERE i = 3; <waiting ...>
+invalid permutation detected
+
+starting permutation: s1a s2a s2b s1b s1c s2c s2d
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f();
+step s1c: COMMIT;
+step s2c: UPDATE a SET i = 4 WHERE i = 3;
+step s2d: COMMIT;
+
+starting permutation: s1a s2a s2b s1b s2c s1c s2d
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f();
+step s2c: UPDATE a SET i = 4 WHERE i = 3; <waiting ...>
+step s1c: COMMIT;
+step s2c: <... completed>
+step s2d: COMMIT;
+
+starting permutation: s1a s2a s2b s1b s2c s2d s1c
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f();
+step s2c: UPDATE a SET i = 4 WHERE i = 3; <waiting ...>
+invalid permutation detected
+
+starting permutation: s1a s2a s2b s2c s1b s1c s2d
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s2c: UPDATE a SET i = 4 WHERE i = 3;
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f(); <waiting ...>
+invalid permutation detected
+
+starting permutation: s1a s2a s2b s2c s1b s2d s1c
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s2c: UPDATE a SET i = 4 WHERE i = 3;
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f(); <waiting ...>
+step s2d: COMMIT;
+step s1b: <... completed>
+step s1c: COMMIT;
+
+starting permutation: s1a s2a s2b s2c s2d s1b s1c
+step s1a: BEGIN;
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s2c: UPDATE a SET i = 4 WHERE i = 3;
+step s2d: COMMIT;
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f();
+step s1c: COMMIT;
+
+starting permutation: s2a s1a s1b s1c s2b s2c s2d
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f();
+step s1c: COMMIT;
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s2c: UPDATE a SET i = 4 WHERE i = 3;
+step s2d: COMMIT;
+
+starting permutation: s2a s1a s1b s2b s1c s2c s2d
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f();
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s1c: COMMIT;
+step s2c: UPDATE a SET i = 4 WHERE i = 3;
+step s2d: COMMIT;
+
+starting permutation: s2a s1a s1b s2b s2c s1c s2d
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f();
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s2c: UPDATE a SET i = 4 WHERE i = 3; <waiting ...>
+step s1c: COMMIT;
+step s2c: <... completed>
+step s2d: COMMIT;
+
+starting permutation: s2a s1a s1b s2b s2c s2d s1c
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f();
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s2c: UPDATE a SET i = 4 WHERE i = 3; <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s1a s2b s1b s1c s2c s2d
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f();
+step s1c: COMMIT;
+step s2c: UPDATE a SET i = 4 WHERE i = 3;
+step s2d: COMMIT;
+
+starting permutation: s2a s1a s2b s1b s2c s1c s2d
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f();
+step s2c: UPDATE a SET i = 4 WHERE i = 3; <waiting ...>
+step s1c: COMMIT;
+step s2c: <... completed>
+step s2d: COMMIT;
+
+starting permutation: s2a s1a s2b s1b s2c s2d s1c
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f();
+step s2c: UPDATE a SET i = 4 WHERE i = 3; <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s1a s2b s2c s1b s1c s2d
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s2c: UPDATE a SET i = 4 WHERE i = 3;
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f(); <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s1a s2b s2c s1b s2d s1c
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s2c: UPDATE a SET i = 4 WHERE i = 3;
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f(); <waiting ...>
+step s2d: COMMIT;
+step s1b: <... completed>
+step s1c: COMMIT;
+
+starting permutation: s2a s1a s2b s2c s2d s1b s1c
+step s2a: BEGIN;
+step s1a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s2c: UPDATE a SET i = 4 WHERE i = 3;
+step s2d: COMMIT;
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f();
+step s1c: COMMIT;
+
+starting permutation: s2a s2b s1a s1b s1c s2c s2d
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s1a: BEGIN;
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f();
+step s1c: COMMIT;
+step s2c: UPDATE a SET i = 4 WHERE i = 3;
+step s2d: COMMIT;
+
+starting permutation: s2a s2b s1a s1b s2c s1c s2d
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s1a: BEGIN;
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f();
+step s2c: UPDATE a SET i = 4 WHERE i = 3; <waiting ...>
+step s1c: COMMIT;
+step s2c: <... completed>
+step s2d: COMMIT;
+
+starting permutation: s2a s2b s1a s1b s2c s2d s1c
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s1a: BEGIN;
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f();
+step s2c: UPDATE a SET i = 4 WHERE i = 3; <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s2b s1a s2c s1b s1c s2d
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s1a: BEGIN;
+step s2c: UPDATE a SET i = 4 WHERE i = 3;
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f(); <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s2b s1a s2c s1b s2d s1c
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s1a: BEGIN;
+step s2c: UPDATE a SET i = 4 WHERE i = 3;
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f(); <waiting ...>
+step s2d: COMMIT;
+step s1b: <... completed>
+step s1c: COMMIT;
+
+starting permutation: s2a s2b s1a s2c s2d s1b s1c
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s1a: BEGIN;
+step s2c: UPDATE a SET i = 4 WHERE i = 3;
+step s2d: COMMIT;
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f();
+step s1c: COMMIT;
+
+starting permutation: s2a s2b s2c s1a s1b s1c s2d
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s2c: UPDATE a SET i = 4 WHERE i = 3;
+step s1a: BEGIN;
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f(); <waiting ...>
+invalid permutation detected
+
+starting permutation: s2a s2b s2c s1a s1b s2d s1c
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s2c: UPDATE a SET i = 4 WHERE i = 3;
+step s1a: BEGIN;
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f(); <waiting ...>
+step s2d: COMMIT;
+step s1b: <... completed>
+step s1c: COMMIT;
+
+starting permutation: s2a s2b s2c s1a s2d s1b s1c
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s2c: UPDATE a SET i = 4 WHERE i = 3;
+step s1a: BEGIN;
+step s2d: COMMIT;
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f();
+step s1c: COMMIT;
+
+starting permutation: s2a s2b s2c s2d s1a s1b s1c
+step s2a: BEGIN;
+step s2b: SELECT * FROM a WHERE i = 1 FOR UPDATE;
+i              
+
+1              
+step s2c: UPDATE a SET i = 4 WHERE i = 3;
+step s2d: COMMIT;
+step s1a: BEGIN;
+step s1b: CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f();
+step s1c: COMMIT;