mirror of
https://github.com/MariaDB/server.git
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71 lines
3.2 KiB
Plaintext
71 lines
3.2 KiB
Plaintext
DROP TABLE IF EXISTS t1;
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DROP TABLE IF EXISTS t2;
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CREATE TABLE t2 (a INT);
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INSERT INTO t2 VALUES(10);
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INSERT INTO t2 VALUES(10);
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INSERT INTO t2 VALUES(20);
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INSERT INTO t2 VALUES(10);
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INSERT INTO t2 VALUES(20);
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SET DEBUG_SYNC= 'locked_table_name SIGNAL thread1_ready WAIT_FOR threads_dumped';
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CREATE TABLE t1 (a INT);
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SET DEBUG_SYNC= 'now WAIT_FOR thread1_ready';
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SET DEBUG_SYNC= 'execute_command_after_close_tables SIGNAL thread2_ready WAIT_FOR threads_dumped';
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SELECT a FROM t2 WHERE a > 15;
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SET DEBUG_SYNC= 'now WAIT_FOR thread2_ready';
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SHOW PROCESSLIST;
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Id User Host db Command Time State Info Rows_sent Rows_examined Rows_read
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### root ### test Query ### ### SHOW PROCESSLIST 0 0 2
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### root ### test Query ### ### CREATE TABLE t1 (a INT) 0 0 1
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### root ### test Query ### ### SELECT a FROM t2 WHERE a > 15 2 5 6
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SELECT id, info, rows_sent, rows_examined, rows_read FROM INFORMATION_SCHEMA.PROCESSLIST ORDER BY id;
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id info rows_sent rows_examined rows_read
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### SELECT id, info, rows_sent, rows_examined, rows_read FROM INFORMATION_SCHEMA.PROCESSLIST ORDER BY id 0 0 1
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### CREATE TABLE t1 (a INT) 0 0 1
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### SELECT a FROM t2 WHERE a > 15 2 5 6
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SET DEBUG_SYNC= 'now SIGNAL threads_dumped';
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a
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20
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20
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SET DEBUG_SYNC= 'sent_row SIGNAL thread1_ready WAIT_FOR threads_dumped';
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SELECT a FROM t2 WHERE a < 15;
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SET DEBUG_SYNC= 'now WAIT_FOR thread1_ready';
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SET DEBUG_SYNC= 'sent_row SIGNAL thread2_ready WAIT_FOR threads_dumped';
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SELECT a FROM t2 WHERE a > 15;
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SET DEBUG_SYNC= 'now WAIT_FOR thread2_ready';
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SHOW PROCESSLIST;
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Id User Host db Command Time State Info Rows_sent Rows_examined Rows_read
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### root ### test Query ### ### SHOW PROCESSLIST 0 0 4
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### root ### test Query ### ### SELECT a FROM t2 WHERE a < 15 1 0 1
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### root ### test Query ### ### SELECT a FROM t2 WHERE a > 15 1 0 3
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SELECT id, info, rows_sent, rows_examined, rows_read FROM INFORMATION_SCHEMA.PROCESSLIST ORDER BY id;
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id info rows_sent rows_examined rows_read
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### SELECT id, info, rows_sent, rows_examined, rows_read FROM INFORMATION_SCHEMA.PROCESSLIST ORDER BY id 0 0 1
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### SELECT a FROM t2 WHERE a < 15 1 0 1
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### SELECT a FROM t2 WHERE a > 15 1 0 3
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SET DEBUG_SYNC= 'now SIGNAL threads_dumped';
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a
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10
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10
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10
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a
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20
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20
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SET DEBUG_SYNC= 'execute_command_after_close_tables SIGNAL thread1_ready WAIT_FOR threads_dumped';
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UPDATE t2 SET a = 15 WHERE a = 20;
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SET DEBUG_SYNC= 'now WAIT_FOR thread1_ready';
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SET DEBUG_SYNC= 'execute_command_after_close_tables SIGNAL thread2_ready WAIT_FOR threads_dumped';
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UPDATE t2 SET a = 15 WHERE a = 10;
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SET DEBUG_SYNC= 'now WAIT_FOR thread2_ready';
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SHOW PROCESSLIST;
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Id User Host db Command Time State Info Rows_sent Rows_examined Rows_read
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### root ### test Query ### ### SHOW PROCESSLIST 0 0 4
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### root ### test Query ### ### UPDATE t2 SET a = 15 WHERE a = 20 0 5 6
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### root ### test Query ### ### UPDATE t2 SET a = 15 WHERE a = 10 0 5 6
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SELECT id, info, rows_sent, rows_examined, rows_read FROM INFORMATION_SCHEMA.PROCESSLIST ORDER BY id;
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id info rows_sent rows_examined rows_read
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### SELECT id, info, rows_sent, rows_examined, rows_read FROM INFORMATION_SCHEMA.PROCESSLIST ORDER BY id 0 0 1
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### UPDATE t2 SET a = 15 WHERE a = 20 0 5 6
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### UPDATE t2 SET a = 15 WHERE a = 10 0 5 6
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SET DEBUG_SYNC= 'now SIGNAL threads_dumped';
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DROP TABLES t1, t2;
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