#### db_type: mysql #### #### test_type: dda_read_skew #### #### 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 ----------rat_dda_read_skew 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 sql: 'INSERT INTO t1 VALUES (1, 0);' Q0-T1 execute opt: 'COMMIT'; ----------rat_dda_read_skew test run---------- Q1-T1 execute opt: 'BEGIN;' Q1 finished at: 2022-4-1 17:40:22:805:890 Q2-T1 execute sql: 'SELECT * FROM t1 WHERE k=0;' current_result: (0,0) *(1) expected_result: (0,0) (2) expected_result: (0,1) Q2 finished at: 2022-4-1 17:40:22:807:577 Q3-T2 execute opt: 'BEGIN;' Q3 finished at: 2022-4-1 17:40:22:905:831 Q4-T2 execute sql: 'UPDATE t1 SET v=1 WHERE k=1;' Q4 finished at: 2022-4-1 17:40:22:907:532 Q5-T2 execute sql: 'UPDATE t1 SET v=1 WHERE k=0;' Q5 finished at: 2022-4-1 17:40:22:908:961 Q6-T1 execute sql: 'SELECT * FROM t1 WHERE k=1;' current_result: (1,0) *(1) expected_result: (1,0) (2) expected_result: (1,1) Q6 finished at: 2022-4-1 17:40:23:6:990 Q7-T2 execute opt: 'COMMIT'; Q7 finished at: 2022-4-1 17:40:23:112:721 Q8-T1 execute opt: 'COMMIT'; Q8 finished at: 2022-4-1 17:40:23:206:196 Q9-T3 execute sql: 'SELECT * FROM t1 ORDER BY k;' current_result: (0,1) (1,1) *(1) expected_result: (0,1) (1,1) *(2) expected_result: (0,1) (1,1) Q9 finished at: 2022-4-1 17:40:23:208:129 Q10-T3 execute opt: 'COMMIT'; Q10 finished at: 2022-4-1 17:40:23:208:944 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