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--echo # --echo # Bug #17059925 : UNIONS COMPUTES ROWS_EXAMINED INCORRECTLY --echo # ## Save current state of slow log variables SET @old_slow_query_log= @@global.slow_query_log; SET @old_log_output= @@global.log_output; SET @old_long_query_time= @@long_query_time; SET GLOBAL log_output= "TABLE"; SET GLOBAL slow_query_log= ON; SET SESSION long_query_time= 0; CREATE TABLE t17059925 (a INT, KEY a(a)); CREATE TABLE t2 (b INT); CREATE TABLE t3 (c INT); INSERT INTO t17059925 VALUES (1); INSERT INTO t2 VALUES (4), (5), (6); INSERT INTO t3 VALUES (7), (8), (9); TRUNCATE table mysql.slow_log; --sorted_result SELECT sleep(0.5) FROM t17059925 UNION SELECT * FROM t2 UNION SELECT * FROM t3; SELECT sleep(0.5) FROM t17059925 UNION ALL SELECT * FROM t2 UNION ALL SELECT * FROM t3; ## SELECT FROM NON TABLE. CREATE FUNCTION t17059925_func1 (a INT) RETURNS INT DETERMINISTIC RETURN a; SELECT t17059925_func1(1), sleep(0.5); SELECT sleep(0.5) from t17059925 UNION SELECT t17059925_func1(1); SELECT * FROM (SELECT t17059925_func1(1)) t WHERE 1= 0 UNION SELECT sleep(0.5); SELECT sleep(0.5) FROM t17059925 UNION SELECT * FROM (SELECT t17059925_func1(1)) t WHERE 1= 0 UNION SELECT t17059925_func1(1); SELECT 1 FROM dual WHERE 1= 0 UNION SELECT sleep(0.5); SELECT sleep(0.5) FROM t17059925 UNION SELECT 1 FROM dual WHERE 1= 0 UNION SELECT * FROM t2; --replace_column 9 ROWS EXPLAIN SELECT t17059925_func1(1); --replace_column 9 ROWS EXPLAIN SELECT * FROM t17059925 UNION SELECT t17059925_func1(1); ## SELECT FROM CONST TABLE. SELECT * FROM t17059925 WHERE a= 10 AND a= 20 UNION SELECT sleep(0.5); SELECT * FROM t17059925 WHERE a= 10 UNION SELECT sleep(0.5); SELECT * FROM (SELECT * FROM t17059925 WHERE a= 10) t WHERE a = 10 UNION SELECT sleep(0.5); SELECT sleep(0.5) FROM t17059925 UNION SELECT * FROM t17059925 WHERE a= 10 AND a= 20 UNION SELECT * FROM t2; SELECT sleep(0.5) FROM t17059925 UNION ALL SELECT * FROM t17059925 WHERE a= 10 AND a= 20 UNION ALL SELECT * FROM t2; SELECT sleep(0.5) FROM t17059925 UNION SELECT * FROM (SELECT * FROM t17059925 WHERE a= 10) t WHERE a = 10 UNION SELECT * from t2; --replace_column 9 ROWS EXPLAIN SELECT * FROM t17059925 WHERE a= 10 AND a= 20; --replace_column 9 ROWS EXPLAIN SELECT * FROM t17059925 UNION SELECT * FROM t17059925 WHERE a= 10 AND a= 20; --sorted_result SELECT sql_text, rows_examined FROM mysql.slow_log WHERE (sql_text LIKE '%SELECT%t17059925%' AND sql_text NOT LIKE '%EXPLAIN%') OR sql_text LIKE '%dual%'; DROP FUNCTION t17059925_func1; DROP TABLE t17059925, t2, t3; ## Reset to initial values SET @@long_query_time= @old_long_query_time; SET @@global.log_output= @old_log_output; SET @@global.slow_query_log= @old_slow_query_log; --echo # --echo # Bug #18335504 MISSING INFORMATION IN SLOW QUERY LOG FOR SLOW HANDLER STATEMENTS --echo # --echo #Setup CREATE TABLE tbl_18335504(a INT, b INT, KEY i1(a)); INSERT INTO tbl_18335504 VALUES( 30, 1); INSERT INTO tbl_18335504 VALUES( 20, 2); INSERT INTO tbl_18335504 VALUES( 10, 3); SET @old_slow_query_log=@@global.slow_query_log; SET @old_log_output=@@global.log_output; SET @old_long_query_time=@@session.long_query_time; SET GLOBAL slow_query_log='on'; SET GLOBAL log_output='table'; SET SESSION long_query_time=1; --echo #Execution HANDLER tbl_18335504 OPEN; HANDLER tbl_18335504 READ FIRST WHERE b = 2 AND 1 > sleep(2); HANDLER tbl_18335504 READ i1 FIRST WHERE a = 20 AND 1 > sleep(2); HANDLER tbl_18335504 READ i1 FIRST WHERE a > 10 AND 1 > sleep(2) LIMIT 5; HANDLER tbl_18335504 READ FIRST WHERE b > 1 AND 1 > sleep(2) LIMIT 5; --echo # rows_sent, rows_examined should be non-zero value SELECT sql_text, rows_sent, rows_examined FROM mysql.slow_log WHERE sql_text LIKE '%tbl_18335504%'; HANDLER tbl_18335504 CLOSE; --echo #Cleanup DROP TABLE tbl_18335504; SET @@global.slow_query_log=@old_slow_query_log; SET @@global.log_output=@old_log_output; SET @@session.long_query_time=@old_long_query_time;