#### db_type: mysql #### #### test_type: sda_lost_self_update #### #### isolation: read-uncommitted #### 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-uncommitted for each session ----------rat_sda_lost_self_update 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'; ----------rat_sda_lost_self_update test run---------- Q1-T1 execute opt: 'BEGIN;' Q1 finished at: 2022-4-1 17:39:42:46:206 Q2-T1 execute sql: 'UPDATE t1 SET v=1 WHERE k=0;' Q2 finished at: 2022-4-1 17:39:42:48:285 Q3-T2 execute opt: 'BEGIN;' Q3 finished at: 2022-4-1 17:39:42:147:672 Q4-T2 execute sql: 'UPDATE t1 SET v=2 WHERE k=0;' Q5-T1 execute sql: 'SELECT * FROM t1 WHERE k=0;' current_result: (0,1) *(1) expected_result: (0,1) *(2) expected_result: (0,1) Q5 finished at: 2022-4-1 17:39:42:248:5 Q6-T1 execute opt: 'COMMIT'; Q4 finished at: 2022-4-1 17:39:42:254:419 Q6 finished at: 2022-4-1 17:39:42:254:459 Q7-T2 execute opt: 'COMMIT'; Q7 finished at: 2022-4-1 17:39:42:352:863 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 17:39:42:354:771 Q9-T3 execute opt: 'COMMIT'; Q9 finished at: 2022-4-1 17:39:42:356:109 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