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Bug#41627 Illegal mix of collations in LEAST / GREATEST / CASE

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Don't throw an error after checking the first and the second arguments.
Continue with checking the third and higher arguments and if some of
them is stronger according to coercibility rules,
then this argument's collation is set as result collation.


mysql-test/r/ctype_collate.result:
  test result
mysql-test/t/ctype_collate.test:
  test case
sql/item.cc:
  Don't throw an error after checking the first and the second arguments.
  Continue with checking the third and higher arguments and if some of
  them is stronger according to coercibility rules,
  then this argument's collation is set as result collation.
This commit is contained in:
Sergey Glukhov
2009-03-19 12:20:28 +04:00
parent da7dc30371
commit af016f72b9
3 changed files with 51 additions and 1 deletions
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14
mysql-test/t/ctype_collate.test
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@ -229,3 +229,17 @@ insert into t1 set a=0x6c;
insert into t1 set a=0x4c98;
check table t1 extended;
drop table t1;
#
# Bug#41627 Illegal mix of collations in LEAST / GREATEST / CASE
#
select least(_latin1'a',_latin2'b',_latin5'c' collate latin5_turkish_ci);
create table t1
select least(_latin1'a',_latin2'b',_latin5'c' collate latin5_turkish_ci) as f1;
show create table t1;
drop table t1;
select case _latin1'a' when _latin2'b' then 1 when _latin5'c' collate
latin5_turkish_ci then 2 else 3 end;
select concat(_latin1'a',_latin2'b',_latin5'c' collate latin5_turkish_ci);