#### db_type: tidb #### #### test_type: sda_lost_self_update_committed #### #### isolation: read-committed #### current_result: The query result of the current SQL statement. Each row of table is separated by a space, and the fields in each row are separated by commas expected_result: The expected result is the expected query result for each SQL that conforms to the serializability theory set TXN_ISOLATION = read-committed for each session ----------wat_sda_lost_self_update_committed test prepare---------- Q0-T1 execute sql: 'DROP TABLE IF EXISTS t1;' Q0-T1 execute sql: 'CREATE TABLE t1 (k INT PRIMARY KEY, v INT);' Q0-T1 execute sql: 'INSERT INTO t1 VALUES (0, 0);' Q0-T1 execute opt: 'COMMIT'; ----------wat_sda_lost_self_update_committed test run---------- Q1-T1 execute sql: 'BEGIN PESSIMISTIC;' Q1 finished at: 2022-4-1 17:18:3:530:183 Q2-T1 execute sql: 'UPDATE t1 SET v=1 WHERE k=0;' Q2 finished at: 2022-4-1 17:18:3:532:23 Q3-T2 execute sql: 'BEGIN PESSIMISTIC;' Q3 finished at: 2022-4-1 17:18:3:630:70 Q4-T2 execute sql: 'UPDATE t1 SET v=2 WHERE k=0;' Q6-T1 execute sql: 'SELECT * FROM t1 WHERE k=0;' current_result: (0,1) *(1) expected_result: (0,1) *(2) expected_result: (0,1) Q6 finished at: 2022-4-1 17:18:3:730:652 Q7-T1 execute opt: 'COMMIT'; Q7 finished at: 2022-4-1 17:18:3:751:632 Q4 finished at: 2022-4-1 17:18:3:787:408 Q5-T2 execute opt: 'COMMIT'; Q5 finished at: 2022-4-1 17:18:3:788:812 Q8-T3 execute sql: 'SELECT * FROM t1;' current_result: (0,2) *(1) expected_result: (0,2) (2) expected_result: (0,1) Q8 finished at: 2022-4-1 17:18:3:790:994 Q9-T3 execute opt: 'COMMIT'; Q9 finished at: 2022-4-1 17:18:3:791:947 The current result is consistent with the [(1) expected_result] of serial scheduling Test Result: Avoid Reason: Data anomaly did not occur and the data is consistent