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# Test of problem with key read (Bug #3666)
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CREATE TABLE t1 (numeropost mediumint(8) NOT NULL default '0', numreponse int(10) NOT NULL auto_increment, PRIMARY KEY (numeropost,numreponse), UNIQUE KEY numreponse (numreponse));
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CREATE TABLE t1 (numeropost int NOT NULL default '0', numreponse int NOT NULL auto_increment, PRIMARY KEY (numeropost,numreponse), UNIQUE KEY numreponse (numreponse));
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INSERT INTO t1 (numeropost,numreponse) VALUES ('1','1'),('1','2'),('2','3'),('2','4');
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SELECT numeropost FROM t1 WHERE numreponse='1';
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EXPLAIN SELECT numeropost FROM t1 WHERE numreponse='1';