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Row comparison now does compare field collations, e.g.

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ROW('a','b','c) = ROW('A' collate latin1_bin,'b','c') returns 0
When a number is compared to a string, character sets and 
collations are not aggregated. e.g. this returned error in 4.1.0:

SELECT 1=_latin2'1';
because character sets was aggregated, and 1 was considered as
a string of latin1 charset during this aggregation.
This commit is contained in:
bar@bar.mysql.r18.ru
2003-07-03 17:00:01 +05:00
parent 6a9a3ec0eb
commit 07f94cb7cd
4 changed files with 68 additions and 34 deletions
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17
mysql-test/t/func_str.test
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@@ -8,6 +8,8 @@
drop table if exists t1;
--enable_warnings
set names latin1;
select 'hello',"'hello'",'""hello""','''h''e''l''l''o''',"hel""lo",'hel\'lo';
select 'hello' 'monty';
select length('\n\t\r\b\0\_\%\\');
@@ -136,6 +138,21 @@ DROP TABLE t1;
#
# Test collation and coercibility
#
select 1=_latin1'1';
select _latin1'1'=1;
select _latin2'1'=1;
select 1=_latin2'1';
--error 1265
select _latin1'1'=_latin2'1';
select row('a','b','c') = row('a','b','c');
select row('A','b','c') = row('a','b','c');
select row('A' COLLATE latin1_bin,'b','c') = row('a','b','c');
select row('A','b','c') = row('a' COLLATE latin1_bin,'b','c');
--error 1265
select row('A' COLLATE latin1_general_ci,'b','c') = row('a' COLLATE latin1_bin,'b','c');
select POSITION(_latin1'B' IN _latin1'abcd');
select POSITION(_latin1'B' IN _latin1'abcd' COLLATE latin1_bin);
select POSITION(_latin1'B' COLLATE latin1_bin IN _latin1'abcd');