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Fix for bug #17896: MIN of CASE WHEN returns non-minimum value!

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sql/item_cmpfunc.cc:
  Fix for bug #17896: MIN of CASE WHEN returns non-minimum value!
  - NULL items should not affect the result type.
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unknown
2006-03-06 16:38:35 +04:00
parent 4391f93892
commit f372641876
3 changed files with 34 additions and 4 deletions
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8
mysql-test/r/case.result
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@ -169,3 +169,11 @@ SELECT CASE '1' WHEN '2' THEN 'BUG' ELSE 'nobug' END;
case+union+test
case+union+test
nobug
create table t1(a float, b int default 3);
insert into t1 (a) values (2), (11), (8);
select min(a), min(case when 1=1 then a else NULL end),
min(case when 1!=1 then NULL else a end)
from t1 where b=3 group by b;
min(a) min(case when 1=1 then a else NULL end) min(case when 1!=1 then NULL else a end)
2 2 2
drop table t1;