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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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29
mysql-test/r/func_str.result
View File

@ -1,4 +1,5 @@
drop table if exists t1;
set names latin1;
select 'hello',"'hello'",'""hello""','''h''e''l''l''o''',"hel""lo",'hel\'lo';
hello 'hello' ""hello"" 'h'e'l'l'o' hel"lo hel'lo
hello 'hello' ""hello"" 'h'e'l'l'o' hel"lo hel'lo
@ -249,6 +250,34 @@ INSERT INTO t1 VALUES (1, 'a545f661efdd1fb66fdee3aab79945bf');
SELECT 1 FROM t1 WHERE tmp=AES_DECRYPT(tmp,"password");
1
DROP TABLE t1;
select 1=_latin1'1';
1=_latin1'1'
1
select _latin1'1'=1;
_latin1'1'=1
1
select _latin2'1'=1;
_latin2'1'=1
1
select 1=_latin2'1';
1=_latin2'1'
1
select _latin1'1'=_latin2'1';
ERROR HY000: Illegal mix of collations (latin1_swedish_ci,COERCIBLE) and (latin2_general_ci,COERCIBLE) for operation '='
select row('a','b','c') = row('a','b','c');
row('a','b','c') = row('a','b','c')
1
select row('A','b','c') = row('a','b','c');
row('A','b','c') = row('a','b','c')
1
select row('A' COLLATE latin1_bin,'b','c') = row('a','b','c');
row('A' COLLATE latin1_bin,'b','c') = row('a','b','c')
0
select row('A','b','c') = row('a' COLLATE latin1_bin,'b','c');
row('A','b','c') = row('a' COLLATE latin1_bin,'b','c')
0
select row('A' COLLATE latin1_general_ci,'b','c') = row('a' COLLATE latin1_bin,'b','c');
ERROR HY000: Illegal mix of collations (latin1_general_ci,EXPLICIT) and (latin1_bin,EXPLICIT) for operation '='
select POSITION(_latin1'B' IN _latin1'abcd');
POSITION(_latin1'B' IN _latin1'abcd')
2