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CREATE TABLE test.v1 (a int, b int); INSERT INTO test.v1 VALUES (1, 100), (2, 200), (3, 300); CREATE TABLE test.t1 (a int, b int); INSERT INTO test.t1 VALUES (1, 100), (2, 200), (3, 300); TRUNCATE TABLE performance_schema.events_statements_summary_by_digest; EXPLAIN SELECT * from test.v1; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE v1 NULL ALL NULL NULL NULL NULL 3 100.00 NULL Warnings: Note 1003 /* select#1 */ select `test`.`v1`.`a` AS `a`,`test`.`v1`.`b` AS `b` from `test`.`v1` EXPLAIN SELECT * from test.v1 where a = 1; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE v1 NULL ALL NULL NULL NULL NULL 3 33.33 Using where Warnings: Note 1003 /* select#1 */ select `test`.`v1`.`a` AS `a`,`test`.`v1`.`b` AS `b` from `test`.`v1` where (`test`.`v1`.`a` = 1) EXPLAIN SELECT * from test.v1 where b > 100; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE v1 NULL ALL NULL NULL NULL NULL 3 33.33 Using where Warnings: Note 1003 /* select#1 */ select `test`.`v1`.`a` AS `a`,`test`.`v1`.`b` AS `b` from `test`.`v1` where (`test`.`v1`.`b` > 100) EXPLAIN SELECT a, b from test.v1; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE v1 NULL ALL NULL NULL NULL NULL 3 100.00 NULL Warnings: Note 1003 /* select#1 */ select `test`.`v1`.`a` AS `a`,`test`.`v1`.`b` AS `b` from `test`.`v1` EXPLAIN SELECT b, a from test.v1; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE v1 NULL ALL NULL NULL NULL NULL 3 100.00 NULL Warnings: Note 1003 /* select#1 */ select `test`.`v1`.`b` AS `b`,`test`.`v1`.`a` AS `a` from `test`.`v1` SELECT * from test.v1; a b 1 100 2 200 3 300 SELECT * from test.v1 where a = 1; a b 1 100 SELECT * from test.v1 where b > 100; a b 2 200 3 300 SELECT a, b from test.v1; a b 1 100 2 200 3 300 SELECT b, a from test.v1; b a 100 1 200 2 300 3 # # DIGESTS SEEN ON TABLE # SELECT SCHEMA_NAME, DIGEST, DIGEST_TEXT, COUNT_STAR FROM performance_schema.events_statements_summary_by_digest ORDER BY DIGEST_TEXT; SCHEMA_NAME DIGEST DIGEST_TEXT COUNT_STAR test faacd4387467f00e5471f3620f0053ee EXPLAIN SELECT * FROM `test` . `v1` 1 test 75f55ccb0b365eefb51cc8f1f1d81132 EXPLAIN SELECT * FROM `test` . `v1` WHERE `a` = ? 1 test f13826a4cdfdfc626f2f338744c9c746 EXPLAIN SELECT * FROM `test` . `v1` WHERE `b` > ? 1 test 4204f1e3809aca8633c27c32603bcf6d EXPLAIN SELECT `a` , `b` FROM `test` . `v1` 1 test fff8925d7c4be86c0c3da7a26c60750e EXPLAIN SELECT `b` , `a` FROM `test` . `v1` 1 test a8465e96fae9df6be0af2b0bcaff9548 SELECT * FROM `test` . `v1` 1 test 90d5479e3ca1cbf7113b3b3abc96f1ff SELECT * FROM `test` . `v1` WHERE `a` = ? 1 test b660099c975325cd338eb80b2849bd61 SELECT * FROM `test` . `v1` WHERE `b` > ? 1 test 9b459b7b8ce957d816066ba4ee0289f9 SELECT `a` , `b` FROM `test` . `v1` 1 test 1c037a199783a415ae1ff2361459f1de SELECT `b` , `a` FROM `test` . `v1` 1 test feaff321c54a9c8e1e9508628f7a5a05 SHOW WARNINGS 5 test d24da32343f2b799f8a7ba1bdc45f83b TRUNCATE TABLE `performance_schema` . `events_statements_summary_by_digest` 1 DROP TABLE test.v1; CREATE VIEW test.v1 AS SELECT * FROM test.t1; EXPLAIN SELECT * from test.v1; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 3 100.00 NULL Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` EXPLAIN SELECT * from test.v1 where a = 1; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 3 33.33 Using where Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where (`test`.`t1`.`a` = 1) EXPLAIN SELECT * from test.v1 where b > 100; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 3 33.33 Using where Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where (`test`.`t1`.`b` > 100) EXPLAIN SELECT a, b from test.v1; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 3 100.00 NULL Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` EXPLAIN SELECT b, a from test.v1; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 3 100.00 NULL Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`b` AS `b`,`test`.`t1`.`a` AS `a` from `test`.`t1` SELECT * from test.v1; a b 1 100 2 200 3 300 SELECT * from test.v1 where a = 1; a b 1 100 SELECT * from test.v1 where b > 100; a b 2 200 3 300 SELECT a, b from test.v1; a b 1 100 2 200 3 300 SELECT b, a from test.v1; b a 100 1 200 2 300 3 # # DIGESTS SEEN ON VIEW # SELECT SCHEMA_NAME, DIGEST, DIGEST_TEXT, COUNT_STAR FROM performance_schema.events_statements_summary_by_digest ORDER BY DIGEST_TEXT; SCHEMA_NAME DIGEST DIGEST_TEXT COUNT_STAR test 1462d84ad90aeabc6106da2a5ba38f17 CREATE VIEW `test` . `v1` AS SELECT * FROM `test` . `t1` 1 test c909e770703c59c353ca199dfe4ca154 DROP TABLE `test` . `v1` 1 test faacd4387467f00e5471f3620f0053ee EXPLAIN SELECT * FROM `test` . `v1` 2 test 75f55ccb0b365eefb51cc8f1f1d81132 EXPLAIN SELECT * FROM `test` . `v1` WHERE `a` = ? 2 test f13826a4cdfdfc626f2f338744c9c746 EXPLAIN SELECT * FROM `test` . `v1` WHERE `b` > ? 2 test 4204f1e3809aca8633c27c32603bcf6d EXPLAIN SELECT `a` , `b` FROM `test` . `v1` 2 test fff8925d7c4be86c0c3da7a26c60750e EXPLAIN SELECT `b` , `a` FROM `test` . `v1` 2 test a8465e96fae9df6be0af2b0bcaff9548 SELECT * FROM `test` . `v1` 2 test 90d5479e3ca1cbf7113b3b3abc96f1ff SELECT * FROM `test` . `v1` WHERE `a` = ? 2 test b660099c975325cd338eb80b2849bd61 SELECT * FROM `test` . `v1` WHERE `b` > ? 2 test f26fa367559d55cac36428d5ebd1d511 SELECT SCHEMA_NAME , `DIGEST` , `DIGEST_TEXT` , `COUNT_STAR` FROM `performance_schema` . `events_statements_summary_by_digest` ORDER BY `DIGEST_TEXT` 1 test 9b459b7b8ce957d816066ba4ee0289f9 SELECT `a` , `b` FROM `test` . `v1` 2 test 1c037a199783a415ae1ff2361459f1de SELECT `b` , `a` FROM `test` . `v1` 2 test feaff321c54a9c8e1e9508628f7a5a05 SHOW WARNINGS 10 test d24da32343f2b799f8a7ba1bdc45f83b TRUNCATE TABLE `performance_schema` . `events_statements_summary_by_digest` 1 DROP VIEW test.v1; DROP TABLE test.t1;