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SET autocommit = 0; START TRANSACTION; *** multi-statemement insert, inserting first positive then negative number: INSERT INTO t1 (`id`, `int1`, `int1_key`, `int1_unique`, `int2`, `int2_key`, `int2_unique`, `for_update`, `connection_id`, `thread_id`, `is_uncommitted`, `is_consistent`) VALUES (40, 40, 40, CONNECTION_ID(), -40, -40, -CONNECTION_ID(), 0, CONNECTION_ID(), 0, 0, 1); INSERT INTO t1 (`id`, `int1`, `int1_key`, `int1_unique`, `int2`, `int2_key`, `int2_unique`, `for_update`, `connection_id`, `thread_id`, `is_uncommitted`, `is_consistent`) VALUES (-40, -40, -40, -CONNECTION_ID(), 40, 40, CONNECTION_ID(), 0, CONNECTION_ID(), 0, 0, 1); COMMIT; START TRANSACTION; *** insert multiple rows using a single statement: INSERT INTO t1 (`id`, `int1`, `int1_key`, `int1_unique`, `int2`, `int2_key`, `int2_unique`, `for_update`, `connection_id`, `thread_id`, `is_uncommitted`, `is_consistent`) VALUES (41, 41, 41, CONNECTION_ID()+1, -41, -41, -(CONNECTION_ID()+1), 0, CONNECTION_ID(), 0, 0, 1), (41, 41, 41, CONNECTION_ID()+2, 41, 41, CONNECTION_ID()+2, 0, CONNECTION_ID(), 0, 0, 0), (41, -41, -41, -(CONNECTION_ID()+2), -41, -41, -(CONNECTION_ID()+2), 0, CONNECTION_ID(), 0, 0, 0); COMMIT; START TRANSACTION; *** INSERT IGNORE using both known duplicate values and non-duplicates: INSERT IGNORE INTO t1 (`id`, `int1`, `int1_key`, `int1_unique`, `int2`, `int2_key`, `int2_unique`, `for_update`, `connection_id`, `thread_id`, `is_uncommitted`, `is_consistent`) VALUES (42, 42, 42, CONNECTION_ID()+3, -42, -42, -(CONNECTION_ID()+3), 0, CONNECTION_ID(), 0, 0, 1); INSERT IGNORE INTO t1 (`pk`, `id`, `int1`, `int1_key`, `int1_unique`, `int2`, `int2_key`, `int2_unique`, `for_update`, `connection_id`, `thread_id`, `is_uncommitted`, `is_consistent`) VALUES (5, 43, 42, 42, CONNECTION_ID(), -42, -42, CONNECTION_ID(), 0, CONNECTION_ID(), 0, 0, 0); INSERT IGNORE INTO t1 (`id`, `int1`, `int1_key`, `int1_unique`, `int2`, `int2_key`, `int2_unique`, `for_update`, `connection_id`, `thread_id`, `is_uncommitted`, `is_consistent`) VALUES (44, 42, 42, (CONNECTION_ID() + 1000) MOD 5000, -42, -42, -((CONNECTION_ID() + 1000) MOD 5000), 0, CONNECTION_ID(), 0, 0, 1); COMMIT;