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CREATE TABLE worklog5743 (col_1_CHAR CHAR(255) , col_2_CHAR CHAR(255) ,
PRIMARY KEY (col_1_CHAR)) engine = innodb;
INSERT INTO worklog5743 VALUES(repeat("a", 200) , repeat("o", 200));
SELECT col_1_CHAR = repeat("a", 200) , col_2_CHAR = repeat("o", 200) FROM
worklog5743;
col_1_CHAR = repeat("a", 200) col_2_CHAR = repeat("o", 200)
1 1
"In connection 1"
SELECT col_1_CHAR = repeat("a", 200) , col_2_CHAR = repeat("o", 200) FROM
worklog5743;
col_1_CHAR = repeat("a", 200) col_2_CHAR = repeat("o", 200)
1 1
SELECT COUNT(*) FROM worklog5743;
COUNT(*)
1
"In connection 2"
START TRANSACTION;
INSERT INTO worklog5743 VALUES(repeat("b", 200) , repeat("o", 200));
UPDATE worklog5743 SET col_1_CHAR = repeat("d", 200) WHERE col_1_CHAR =
repeat("a", 200) AND col_2_CHAR = repeat("o", 200);
SELECT col_1_CHAR = repeat("a", 200) , col_2_CHAR = repeat("o", 200) FROM
worklog5743;
col_1_CHAR = repeat("a", 200) col_2_CHAR = repeat("o", 200)
0 1
0 1
"In connection 1"
SELECT col_1_CHAR = repeat("b", 200) , col_2_CHAR = repeat("o", 200) FROM
worklog5743;
col_1_CHAR = repeat("b", 200) col_2_CHAR = repeat("o", 200)
0 1
START TRANSACTION;
SELECT col_1_CHAR = repeat("a", 200) , col_2_CHAR = repeat("o", 200) FROM
worklog5743;
col_1_CHAR = repeat("a", 200) col_2_CHAR = repeat("o", 200)
1 1
SELECT COUNT(*) FROM worklog5743;
COUNT(*)
1
"In connection 2"
COMMIT;
SELECT sleep(5);
sleep(5)
0
"In connection 1"
SELECT col_1_CHAR = repeat("b", 200) , col_2_CHAR = repeat("o", 200) FROM
worklog5743;
col_1_CHAR = repeat("b", 200) col_2_CHAR = repeat("o", 200)
0 1
SELECT col_1_CHAR = repeat("a", 200) , col_2_CHAR = repeat("o", 200) FROM
worklog5743;
col_1_CHAR = repeat("a", 200) col_2_CHAR = repeat("o", 200)
1 1
SELECT COUNT(*) FROM worklog5743;
COUNT(*)
1
COMMIT;
DROP TABLE worklog5743;