Add new test files for lock level patch

6 files changed, 2845 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 00000000000..cef7516ca9a
--- /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 00000000000..7dc64df5a1f
--- /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 00000000000..e8bb74099fd
--- /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;
diff --git a/src/test/isolation/specs/alter-table-2.spec b/src/test/isolation/specs/alter-table-2.spec
new file mode 100644
index 00000000000..e6a02e01d62
--- /dev/null
+++ b/src/test/isolation/specs/alter-table-2.spec
@@ -0,0 +1,30 @@
+# ALTER TABLE - Add foreign keys with concurrent reads
+#
+# ADD CONSTRAINT uses ShareRowExclusiveLock so we mix writes with it
+# to see what works or waits.
+
+setup
+{
+ CREATE TABLE a (i int PRIMARY KEY);
+ CREATE TABLE b (a_id int);
+ INSERT INTO a VALUES (0), (1), (2), (3);
+ INSERT INTO b SELECT generate_series(1,1000) % 4;
+}
+
+teardown
+{
+ DROP TABLE a, b;
+}
+
+session "s1"
+step "s1a" { BEGIN; }
+step "s1b" { ALTER TABLE b ADD CONSTRAINT bfk FOREIGN KEY (a_id) REFERENCES a (i) NOT VALID; }
+step "s1c" { COMMIT; }
+
+session "s2"
+step "s2a" { BEGIN; }
+step "s2b" { SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE; }
+step "s2c" { SELECT * FROM b WHERE a_id = 3 LIMIT 1 FOR UPDATE; }
+step "s2d" { INSERT INTO b VALUES (0); }
+step "s2e" { INSERT INTO a VALUES (4); }
+step "s2f" { COMMIT; }
diff --git a/src/test/isolation/specs/alter-table-3.spec b/src/test/isolation/specs/alter-table-3.spec
new file mode 100644
index 00000000000..d2526203130
--- /dev/null
+++ b/src/test/isolation/specs/alter-table-3.spec
@@ -0,0 +1,30 @@
+# ALTER TABLE - Enable and disable triggers with concurrent reads
+#
+# ENABLE/DISABLE TRIGGER uses ShareRowExclusiveLock so we mix writes with
+# it to see what works or waits.
+
+setup
+{
+ CREATE TABLE a (i int PRIMARY KEY);
+ INSERT INTO a VALUES (0), (1), (2), (3);
+ CREATE FUNCTION f() RETURNS TRIGGER LANGUAGE plpgsql AS 'BEGIN RETURN NULL; END;';
+ CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f();
+}
+
+teardown
+{
+ DROP TABLE a;
+ DROP FUNCTION f();
+}
+
+session "s1"
+step "s1a" { BEGIN; }
+step "s1b" { ALTER TABLE a DISABLE TRIGGER t; }
+step "s1c" { ALTER TABLE a ENABLE TRIGGER t; }
+step "s1d" { COMMIT; }
+
+session "s2"
+step "s2a" { BEGIN; }
+step "s2b" { SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE; }
+step "s2c" { INSERT INTO a VALUES (0); }
+step "s2d" { COMMIT; }
diff --git a/src/test/isolation/specs/create-trigger.spec b/src/test/isolation/specs/create-trigger.spec
new file mode 100644
index 00000000000..34fad7521f5
--- /dev/null
+++ b/src/test/isolation/specs/create-trigger.spec
@@ -0,0 +1,28 @@
+# CREATE TRIGGER - Add trigger with concurrent reads
+#
+# CREATE TRIGGER uses ShareRowExclusiveLock so we mix writes with it
+# to see what works or waits.
+
+setup
+{
+ CREATE TABLE a (i int);
+ CREATE FUNCTION f() RETURNS TRIGGER LANGUAGE plpgsql AS 'BEGIN RETURN NULL; END;';
+ INSERT INTO a VALUES (0), (1), (2), (3);
+}
+
+teardown
+{
+ DROP TABLE a;
+ DROP FUNCTION f();
+}
+
+session "s1"
+step "s1a" { BEGIN; }
+step "s1b" { CREATE TRIGGER t AFTER UPDATE ON a EXECUTE PROCEDURE f(); }
+step "s1c" { COMMIT; }
+
+session "s2"
+step "s2a" { BEGIN; }
+step "s2b" { SELECT * FROM a WHERE i = 1 FOR UPDATE; }
+step "s2c" { UPDATE a SET i = 4 WHERE i = 3; }
+step "s2d" { COMMIT; }