411 lines
15 KiB
Python
411 lines
15 KiB
Python
setup
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{
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CREATE TABLE trigtest(key text primary key, data text);
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CREATE FUNCTION noisy_oper(p_comment text, p_a anynonarray, p_op text, p_b anynonarray)
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RETURNS bool LANGUAGE plpgsql AS $body$
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DECLARE
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r bool;
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BEGIN
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EXECUTE format('SELECT $1 %s $2', p_op) INTO r USING p_a, p_b;
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RAISE NOTICE '%: % % % % %: %', p_comment, pg_typeof(p_a), p_a, p_op, pg_typeof(p_b), p_b, r;
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RETURN r;
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END;$body$;
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CREATE FUNCTION trig_report() RETURNS TRIGGER LANGUAGE plpgsql AS $body$
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DECLARE
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r_new text;
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r_old text;
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r_ret record;
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BEGIN
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-- In older releases it wasn't allowed to reference OLD/NEW
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-- when not applicable for TG_WHEN
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IF TG_OP = 'INSERT' THEN
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r_old = NULL;
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r_new = NEW;
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r_ret = NEW;
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ELSIF TG_OP = 'DELETE' THEN
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r_old = OLD;
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r_new = NULL;
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r_ret = OLD;
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ELSIF TG_OP = 'UPDATE' THEN
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r_old = OLD;
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r_new = NEW;
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r_ret = NEW;
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END IF;
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IF TG_WHEN = 'AFTER' THEN
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r_ret = NULL;
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END IF;
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RAISE NOTICE 'trigger: name %; when: %; lev: %s; op: %; old: % new: %',
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TG_NAME, TG_WHEN, TG_LEVEL, TG_OP, r_old, r_new;
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RETURN r_ret;
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END;
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$body$;
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}
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teardown
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{
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DROP TABLE trigtest;
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DROP FUNCTION noisy_oper(text, anynonarray, text, anynonarray);
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DROP FUNCTION trig_report();
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}
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session s0
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step s0_rep { SELECT * FROM trigtest ORDER BY key, data }
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session s1
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#setup { }
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step s1_b_rc { BEGIN ISOLATION LEVEL READ COMMITTED; SELECT 1; }
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step s1_b_rr { BEGIN ISOLATION LEVEL REPEATABLE READ; SELECT 1; }
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step s1_c { COMMIT; }
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step s1_r { ROLLBACK; }
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step s1_trig_rep_b_i { CREATE TRIGGER rep_b_i BEFORE INSERT ON trigtest FOR EACH ROW EXECUTE PROCEDURE trig_report(); }
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step s1_trig_rep_a_i { CREATE TRIGGER rep_a_i AFTER INSERT ON trigtest FOR EACH ROW EXECUTE PROCEDURE trig_report(); }
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step s1_trig_rep_b_u { CREATE TRIGGER rep_b_u BEFORE UPDATE ON trigtest FOR EACH ROW EXECUTE PROCEDURE trig_report(); }
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step s1_trig_rep_a_u { CREATE TRIGGER rep_a_u AFTER UPDATE ON trigtest FOR EACH ROW EXECUTE PROCEDURE trig_report(); }
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step s1_trig_rep_b_d { CREATE TRIGGER rep_b_d BEFORE DELETE ON trigtest FOR EACH ROW EXECUTE PROCEDURE trig_report(); }
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step s1_trig_rep_a_d { CREATE TRIGGER rep_a_d AFTER DELETE ON trigtest FOR EACH ROW EXECUTE PROCEDURE trig_report(); }
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step s1_ins_a { INSERT INTO trigtest VALUES ('key-a', 'val-a-s1') RETURNING *; }
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step s1_ins_b { INSERT INTO trigtest VALUES ('key-b', 'val-b-s1') RETURNING *; }
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step s1_ins_c { INSERT INTO trigtest VALUES ('key-c', 'val-c-s1') RETURNING *; }
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step s1_del_a {
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DELETE FROM trigtest
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WHERE
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noisy_oper('upd', key, '=', 'key-a') AND
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noisy_oper('upk', data, '<>', 'mismatch')
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RETURNING *
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}
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step s1_del_b {
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DELETE FROM trigtest
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WHERE
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noisy_oper('upd', key, '=', 'key-b') AND
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noisy_oper('upk', data, '<>', 'mismatch')
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RETURNING *
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}
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step s1_upd_a_data {
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UPDATE trigtest SET data = data || '-ups1'
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WHERE
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noisy_oper('upd', key, '=', 'key-a') AND
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noisy_oper('upk', data, '<>', 'mismatch')
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RETURNING *;
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}
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step s1_upd_b_data {
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UPDATE trigtest SET data = data || '-ups1'
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WHERE
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noisy_oper('upd', key, '=', 'key-b') AND
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noisy_oper('upk', data, '<>', 'mismatch')
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RETURNING *;
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}
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step s1_upd_a_tob {
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UPDATE trigtest SET key = 'key-b', data = data || '-tobs1'
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WHERE
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noisy_oper('upk', key, '=', 'key-a') AND
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noisy_oper('upk', data, '<>', 'mismatch')
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RETURNING *;
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}
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session s2
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#setup { }
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step s2_b_rc { BEGIN ISOLATION LEVEL READ COMMITTED; SELECT 1; }
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step s2_b_rr { BEGIN ISOLATION LEVEL REPEATABLE READ; SELECT 1; }
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step s2_c { COMMIT; }
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step s2_r { ROLLBACK; }
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step s2_ins_a { INSERT INTO trigtest VALUES ('key-a', 'val-a-s2') RETURNING *; }
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step s2_del_a {
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DELETE FROM trigtest
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WHERE
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noisy_oper('upd', key, '=', 'key-a') AND
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noisy_oper('upk', data, '<>', 'mismatch')
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RETURNING *
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}
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step s2_upd_a_data {
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UPDATE trigtest SET data = data || '-ups2'
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WHERE
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noisy_oper('upd', key, '=', 'key-a') AND
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noisy_oper('upk', data, '<>', 'mismatch')
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RETURNING *;
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}
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step s2_upd_b_data {
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UPDATE trigtest SET data = data || '-ups2'
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WHERE
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noisy_oper('upd', key, '=', 'key-b') AND
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noisy_oper('upk', data, '<>', 'mismatch')
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RETURNING *;
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}
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step s2_upd_all_data {
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UPDATE trigtest SET data = data || '-ups2'
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WHERE
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noisy_oper('upd', key, '<>', 'mismatch') AND
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noisy_oper('upk', data, '<>', 'mismatch')
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RETURNING *;
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}
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step s2_upsert_a_data {
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INSERT INTO trigtest VALUES ('key-a', 'val-a-upss2')
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ON CONFLICT (key)
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DO UPDATE SET data = trigtest.data || '-upserts2'
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WHERE
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noisy_oper('upd', trigtest.key, '=', 'key-a') AND
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noisy_oper('upk', trigtest.data, '<>', 'mismatch')
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RETURNING *;
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}
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session s3
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#setup { }
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step s3_b_rc { BEGIN ISOLATION LEVEL READ COMMITTED; SELECT 1; }
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step s3_c { COMMIT; }
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step s3_r { ROLLBACK; }
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step s3_del_a {
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DELETE FROM trigtest
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WHERE
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noisy_oper('upd', key, '=', 'key-a') AND
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noisy_oper('upk', data, '<>', 'mismatch')
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RETURNING *
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}
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step s3_upd_a_data {
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UPDATE trigtest SET data = data || '-ups3'
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WHERE
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noisy_oper('upd', key, '=', 'key-a') AND
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noisy_oper('upk', data, '<>', 'mismatch')
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RETURNING *;
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}
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### base case verifying that triggers see performed modifications
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# s1 updates, s1 commits, s2 updates
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permutation s1_trig_rep_b_u s1_trig_rep_a_u
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s1_ins_a s1_ins_b s1_b_rc s2_b_rc
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s1_upd_a_data s1_c s2_upd_a_data s2_c
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s0_rep
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# s1 updates, s1 rolls back, s2 updates
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permutation s1_trig_rep_b_u s1_trig_rep_a_u
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s1_ins_a s1_ins_b s1_b_rc s2_b_rc
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s1_upd_a_data s1_r s2_upd_a_data s2_c
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s0_rep
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# s1 updates, s1 commits back, s2 deletes
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permutation s1_trig_rep_b_d s1_trig_rep_b_u s1_trig_rep_a_d s1_trig_rep_a_u
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s1_ins_a s1_ins_b s1_b_rc s2_b_rc
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s1_upd_a_data s1_c s2_del_a s2_c
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s0_rep
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# s1 updates, s1 rolls back back, s2 deletes
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permutation s1_trig_rep_b_d s1_trig_rep_b_u s1_trig_rep_a_d s1_trig_rep_a_u
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s1_ins_a s1_ins_b s1_b_rc s2_b_rc
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s1_upd_a_data s1_r s2_del_a s2_c
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s0_rep
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### Verify EPQ is performed if necessary, and skipped if transaction rolled back
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# s1 updates, s2 updates, s1 commits, EPQ
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permutation s1_trig_rep_b_u s1_trig_rep_a_u
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s1_ins_a s1_ins_b s1_b_rc s2_b_rc
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s1_upd_a_data s2_upd_a_data s1_c s2_c
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s0_rep
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# s1 updates, s2 updates, s1 rolls back, no EPQ
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permutation s1_trig_rep_b_u s1_trig_rep_a_u
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s1_ins_a s1_ins_b s1_b_rc s2_b_rc
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s1_upd_a_data s2_upd_a_data s1_r s2_c
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s0_rep
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# s1 updates, s2 deletes, s1 commits, EPQ
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permutation s1_trig_rep_b_d s1_trig_rep_b_u s1_trig_rep_a_d s1_trig_rep_a_u
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s1_ins_a s1_ins_b s1_b_rc s2_b_rc
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s1_upd_a_data s2_upd_a_data s1_c s2_c
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s0_rep
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# s1 updates, s2 deletes, s1 rolls back, no EPQ
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permutation s1_trig_rep_b_d s1_trig_rep_b_u s1_trig_rep_a_d s1_trig_rep_a_u
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s1_ins_a s1_ins_b s1_b_rc s2_b_rc
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s1_upd_a_data s2_upd_a_data s1_r s2_c
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s0_rep
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# s1 deletes, s2 updates, s1 commits, EPQ
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permutation s1_trig_rep_b_d s1_trig_rep_b_u s1_trig_rep_a_d s1_trig_rep_a_u
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s1_ins_a s1_ins_b s1_b_rc s2_b_rc
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s1_del_a s2_upd_a_data s1_c s2_c
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s0_rep
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# s1 deletes, s2 updates, s1 rolls back, no EPQ
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permutation s1_trig_rep_b_d s1_trig_rep_b_u s1_trig_rep_a_d s1_trig_rep_a_u
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s1_ins_a s1_ins_b s1_b_rc s2_b_rc
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s1_del_a s2_upd_a_data s1_r s2_c
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s0_rep
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# s1 inserts, s2 inserts, s1 commits, s2 inserts, unique conflict
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permutation s1_trig_rep_b_i s1_trig_rep_b_d s1_trig_rep_a_i s1_trig_rep_a_d
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s1_b_rc s2_b_rc
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s1_ins_a s2_ins_a s1_c s2_c
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s0_rep
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# s1 inserts, s2 inserts, s1 rolls back, s2 inserts, no unique conflict
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permutation s1_trig_rep_b_i s1_trig_rep_b_d s1_trig_rep_a_i s1_trig_rep_a_d
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s1_b_rc s2_b_rc
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s1_ins_a s2_ins_a s1_r s2_c
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s0_rep
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# s1 updates, s2 upserts, s1 commits, EPQ
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permutation s1_trig_rep_b_i s1_trig_rep_b_d s1_trig_rep_b_u s1_trig_rep_a_i s1_trig_rep_a_d s1_trig_rep_a_u
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s1_ins_a s1_ins_b s1_b_rc s2_b_rc
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s1_upd_a_data s2_upsert_a_data s1_c s2_c
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s0_rep
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# s1 updates, s2 upserts, s1 rolls back, no EPQ
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permutation s1_trig_rep_b_i s1_trig_rep_b_d s1_trig_rep_b_u s1_trig_rep_a_i s1_trig_rep_a_d s1_trig_rep_a_u
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s1_ins_a s1_ins_b s1_b_rc s2_b_rc
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s1_upd_a_data s2_upsert_a_data s1_c s2_c
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s0_rep
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# s1 inserts, s2 upserts, s1 commits
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permutation s1_trig_rep_b_i s1_trig_rep_b_d s1_trig_rep_b_u s1_trig_rep_a_i s1_trig_rep_a_d s1_trig_rep_a_u
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s1_b_rc s2_b_rc
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s1_ins_a s2_upsert_a_data s1_c s2_c
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s0_rep
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# s1 inserts, s2 upserts, s1 rolls back
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permutation s1_trig_rep_b_i s1_trig_rep_b_d s1_trig_rep_b_u s1_trig_rep_a_i s1_trig_rep_a_d s1_trig_rep_a_u
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s1_b_rc s2_b_rc
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s1_ins_a s2_upsert_a_data s1_r s2_c
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s0_rep
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# s1 inserts, s2 upserts, s1 updates, s1 commits, EPQ
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permutation s1_trig_rep_b_i s1_trig_rep_b_d s1_trig_rep_b_u s1_trig_rep_a_i s1_trig_rep_a_d s1_trig_rep_a_u
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s1_b_rc s2_b_rc
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s1_ins_a s1_upd_a_data s2_upsert_a_data s1_c s2_c
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s0_rep
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# s1 inserts, s2 upserts, s1 updates, s1 rolls back, no EPQ
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permutation s1_trig_rep_b_i s1_trig_rep_b_d s1_trig_rep_b_u s1_trig_rep_a_i s1_trig_rep_a_d s1_trig_rep_a_u
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s1_b_rc s2_b_rc
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s1_ins_a s1_upd_a_data s2_upsert_a_data s1_r s2_c
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s0_rep
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### Verify EPQ is performed if necessary, and skipped if transaction rolled back,
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### just without before triggers (for comparison, no additional row locks)
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# s1 updates, s2 updates, s1 commits, EPQ
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permutation s1_trig_rep_a_u
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s1_ins_a s1_ins_b s1_b_rc s2_b_rc
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s1_upd_a_data s2_upd_a_data s1_c s2_c
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s0_rep
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# s1 updates, s2 updates, s1 rolls back, no EPQ
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permutation s1_trig_rep_a_u
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s1_ins_a s1_ins_b s1_b_rc s2_b_rc
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s1_upd_a_data s2_upd_a_data s1_r s2_c
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s0_rep
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# s1 updates, s2 deletes, s1 commits, EPQ
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permutation s1_trig_rep_a_d s1_trig_rep_a_u
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s1_ins_a s1_ins_b s1_b_rc s2_b_rc
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s1_upd_a_data s2_del_a s1_c s2_c
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s0_rep
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# s1 updates, s2 deletes, s1 rolls back, no EPQ
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permutation s1_trig_rep_a_d s1_trig_rep_a_u
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s1_ins_a s1_ins_b s1_b_rc s2_b_rc
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s1_upd_a_data s2_del_a s1_r s2_c
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s0_rep
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# s1 deletes, s2 updates, s1 commits, EPQ
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permutation s1_trig_rep_a_d s1_trig_rep_a_u
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s1_ins_a s1_ins_b s1_b_rc s2_b_rc
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s1_del_a s2_upd_a_data s1_c s2_c
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s0_rep
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# s1 deletes, s2 updates, s1 rolls back, no EPQ
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permutation s1_trig_rep_a_d s1_trig_rep_a_u
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s1_ins_a s1_ins_b s1_b_rc s2_b_rc
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s1_del_a s2_upd_a_data s1_r s2_c
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s0_rep
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# s1 deletes, s2 deletes, s1 commits, EPQ
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permutation s1_trig_rep_a_d
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s1_ins_a s1_ins_b s1_b_rc s2_b_rc
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s1_del_a s2_del_a s1_c s2_c
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s0_rep
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# s1 deletes, s2 deletes, s1 rolls back, no EPQ
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permutation s1_trig_rep_a_d
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s1_ins_a s1_ins_b s1_b_rc s2_b_rc
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s1_del_a s2_del_a s1_r s2_c
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s0_rep
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### Verify that an update affecting a row that has been
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### updated/deleted to not match the where clause anymore works
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### correctly
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# s1 updates to different key, s2 updates old key, s1 commits, EPQ failure should lead to no update
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permutation s1_trig_rep_b_u s1_trig_rep_a_u
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s1_ins_a s1_ins_c s1_b_rc s2_b_rc
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s1_upd_a_tob s2_upd_a_data s1_c s2_c
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s0_rep
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# s1 updates to different key, s2 updates old key, s1 rolls back, no EPQ failure
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permutation s1_trig_rep_b_u s1_trig_rep_a_u
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s1_ins_a s1_ins_c s1_b_rc s2_b_rc
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s1_upd_a_tob s2_upd_a_data s1_r s2_c
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s0_rep
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# s1 updates to different key, s2 updates new key, s1 commits, s2 will
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# not see tuple with new key and not block
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permutation s1_trig_rep_b_u s1_trig_rep_a_u
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s1_ins_a s1_ins_c s1_b_rc s2_b_rc
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s1_upd_a_tob s2_upd_b_data s1_c s2_c
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s0_rep
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# s1 updates to different key, s2 updates all keys, s1 commits, s2,
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# will not see tuple with old key, but block on old, and then follow
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# the chain
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permutation s1_trig_rep_b_u s1_trig_rep_a_u
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s1_ins_a s1_ins_c s1_b_rc s2_b_rc
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s1_upd_a_tob s2_upd_all_data s1_c s2_c
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s0_rep
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# s1 deletes, s2 updates, s1 committs, EPQ failure should lead to no update
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permutation s1_trig_rep_b_d s1_trig_rep_b_u s1_trig_rep_a_d s1_trig_rep_a_u
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s1_ins_a s1_ins_c s1_b_rc s2_b_rc
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s1_del_a s2_upd_a_data s1_c s2_c
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s0_rep
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# s1 deletes, s2 updates, s1 rolls back, no EPQ failure
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permutation s1_trig_rep_b_d s1_trig_rep_b_u s1_trig_rep_a_d s1_trig_rep_a_u
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s1_ins_a s1_ins_c s1_b_rc s2_b_rc
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s1_del_a s2_upd_a_data s1_r s2_c
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s0_rep
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# s1 deletes, s2 deletes, s1 committs, EPQ failure should lead to no delete
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permutation s1_trig_rep_b_d s1_trig_rep_a_d
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s1_ins_a s1_ins_c s1_b_rc s2_b_rc
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s1_del_a s2_del_a s1_c s2_c
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s0_rep
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# s1 deletes, s2 deletes, s1 rolls back, no EPQ failure
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permutation s1_trig_rep_b_d s1_trig_rep_a_d
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s1_ins_a s1_ins_c s1_b_rc s2_b_rc
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s1_del_a s2_del_a s1_r s2_c
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s0_rep
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### Verify EPQ with more than two participants works
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## XXX: Disable tests, there is some potential for instability here that's not yet fully understood
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## s1 updates, s2 updates, s3 updates, s1 commits, s2 EPQ, s2 commits, s3 EPQ
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#permutation s1_trig_rep_b_u s1_trig_rep_a_u
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# s1_ins_a s1_ins_b s1_b_rc s2_b_rc s3_b_rc
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# s1_upd_a_data s2_upd_a_data s3_upd_a_data s1_c s2_c s3_c
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# s0_rep
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## s1 updates, s2 updates, s3 updates, s1 commits, s2 EPQ, s2 rolls back, s3 EPQ
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#permutation s1_trig_rep_b_u s1_trig_rep_a_u
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# s1_ins_a s1_ins_b s1_b_rc s2_b_rc s3_b_rc
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# s1_upd_a_data s2_upd_a_data s3_upd_a_data s1_c s2_r s3_c
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# s0_rep
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## s1 updates, s3 updates, s2 upserts, s1 updates, s1 commits, s3 EPQ, s3 deletes, s3 commits, s2 inserts without EPQ recheck
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#permutation s1_trig_rep_b_i s1_trig_rep_b_d s1_trig_rep_b_u s1_trig_rep_a_i s1_trig_rep_a_d s1_trig_rep_a_u
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# s1_ins_a s1_b_rc s2_b_rc s3_b_rc
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# s1_upd_a_data s3_upd_a_data s2_upsert_a_data s1_upd_a_data s1_c s3_del_a s3_c s2_c
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# s0_rep
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## s1 updates, s3 updates, s2 upserts, s1 updates, s1 commits, s3 EPQ, s3 deletes, s3 rolls back, s2 EPQ
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#permutation s1_trig_rep_b_i s1_trig_rep_b_d s1_trig_rep_b_u s1_trig_rep_a_i s1_trig_rep_a_d s1_trig_rep_a_u
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# s1_ins_a s1_b_rc s2_b_rc s3_b_rc
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# s1_upd_a_data s3_upd_a_data s2_upsert_a_data s1_upd_a_data s1_c s3_del_a s3_r s2_c
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# s0_rep
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### Document that EPQ doesn't "leap" onto a tuple that would match after blocking
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# s1 inserts a, s1 updates b, s2 updates b, s1 deletes b, s1 updates a to b, s1 commits, s2 EPQ finds tuple deleted
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permutation s1_trig_rep_b_i s1_trig_rep_b_d s1_trig_rep_b_u s1_trig_rep_a_i s1_trig_rep_a_d s1_trig_rep_a_u
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s1_ins_b s1_b_rc s2_b_rc
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s1_ins_a s1_upd_b_data s2_upd_b_data s1_del_b s1_upd_a_tob s1_c s2_c
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s0_rep
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### Triggers for EPQ detect serialization failures
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# s1 updates, s2 updates, s1 commits, serialization failure
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permutation s1_trig_rep_b_u s1_trig_rep_a_u
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s1_ins_a s1_ins_b s1_b_rr s2_b_rr
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s1_upd_a_data s2_upd_a_data s1_c s2_c
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s0_rep
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# s1 updates, s2 updates, s1 rolls back, s2 succeeds
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permutation s1_trig_rep_b_u s1_trig_rep_a_u
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s1_ins_a s1_ins_b s1_b_rr s2_b_rr
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s1_upd_a_data s2_upd_a_data s1_r s2_c
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s0_rep
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# s1 deletes, s2 updates, s1 commits, serialization failure
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permutation s1_trig_rep_b_d s1_trig_rep_b_u s1_trig_rep_a_d s1_trig_rep_a_u
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s1_ins_a s1_ins_b s1_b_rr s2_b_rr
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s1_del_a s2_upd_a_data s1_c s2_c
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s0_rep
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# s1 deletes, s2 updates, s1 rolls back, s2 succeeds
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permutation s1_trig_rep_b_d s1_trig_rep_b_u s1_trig_rep_a_d s1_trig_rep_a_u
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s1_ins_a s1_ins_b s1_b_rr s2_b_rr
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s1_del_a s2_upd_a_data s1_r s2_c
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s0_rep
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