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67 lines
1.1 KiB
Plaintext
67 lines
1.1 KiB
Plaintext
DROP TABLE IF EXISTS t1;
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CREATE TABLE t1 (a <INT_COLUMN>, b <CHAR_COLUMN>) ENGINE=<STORAGE_ENGINE> <CUSTOM_TABLE_OPTIONS>;
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INSERT INTO t1 (a,b) VALUES (11,'foobar'),(12,'b');
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SET LOW_PRIORITY_UPDATES = 0;
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SET lock_wait_timeout = 4;
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connect con1,localhost,root,,;
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SET lock_wait_timeout = 2;
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SELECT a+SLEEP(1) FROM t1;
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connection default;
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UPDATE t1 SET a=a+10;
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connect con2,localhost,root,,;
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SET lock_wait_timeout = 3;
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SELECT a+SLEEP(1) FROM t1;
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a+SLEEP(1)
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21
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22
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connection con1;
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a+SLEEP(1)
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11
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12
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connection default;
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SELECT * FROM t1;
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a b
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21 foobar
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22 b
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connection con1;
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SELECT a+SLEEP(1) FROM t1;
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connection default;
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UPDATE LOW_PRIORITY t1 SET a=a+20;
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connection con2;
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SELECT a+SLEEP(1) FROM t1;
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a+SLEEP(1)
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21
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22
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connection con1;
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a+SLEEP(1)
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21
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22
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connection default;
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SELECT * FROM t1;
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a b
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41 foobar
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42 b
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SET LOW_PRIORITY_UPDATES = 1;
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connection con1;
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SELECT a+SLEEP(1) FROM t1;
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connection default;
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UPDATE t1 SET a=a+30;
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connection con2;
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SELECT a+SLEEP(1) FROM t1;
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a+SLEEP(1)
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41
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42
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connection con1;
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a+SLEEP(1)
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41
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42
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connection default;
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SELECT * FROM t1;
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a b
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71 foobar
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72 b
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disconnect con1;
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disconnect con2;
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connection default;
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DROP TABLE t1;
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