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A fix for new conditions being defined and upper condition not updated
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@ -40,3 +40,4 @@ date numfacture expedition
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0000-00-00 00:00:00 1212 0001-00-00 00:00:00
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table type possible_keys key key_len ref rows Extra
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t1 ref expedition expedition 8 const 1 where used
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a b
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@ -50,3 +50,8 @@ INSERT INTO t1 (numfacture,expedition) VALUES ('1212','0001-00-00 00:00:00');
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SELECT * FROM t1 WHERE expedition='0001-00-00 00:00:00';
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EXPLAIN SELECT * FROM t1 WHERE expedition='0001-00-00 00:00:00';
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drop table t1;
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create table t1 (a datetime not null, b datetime not null);
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insert into t1 values (now(), now());
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insert into t1 values (now(), now());
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select * from t1 where a is null or b is null;
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drop table t1;
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