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Bugs#9129: CHARSET(), COLLATION(), COERCIBILITY()

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not always correct for NULL values.
Now they always result a non NULL value even
the argument is NULL. It is more usefull for 
debugging purposes.
This commit is contained in:
bar@mysql.com
2005-03-16 17:44:29 +04:00
parent 41487d0b4e
commit a7b877df78
4 changed files with 26 additions and 14 deletions
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11
mysql-test/r/func_str.result
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@ -512,7 +512,7 @@ collation(make_set(255,_latin2'a',_latin2'b',_latin2'c')) coercibility(make_set(
latin2_general_ci 4
select collation(export_set(255,_latin2'y',_latin2'n',_latin2' ')), coercibility(export_set(255,_latin2'y',_latin2'n',_latin2' '));
collation(export_set(255,_latin2'y',_latin2'n',_latin2' ')) coercibility(export_set(255,_latin2'y',_latin2'n',_latin2' '))
binary 4
latin2_general_ci 4
select collation(trim(_latin2' a ')), coercibility(trim(_latin2' a '));
collation(trim(_latin2' a ')) coercibility(trim(_latin2' a '))
latin2_general_ci 4
@ -627,6 +627,15 @@ t1 CREATE TABLE `t1` (
`encode('abcd','ab')` binary(4) NOT NULL default ''
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
create table t1 (a char character set latin2);
insert into t1 values (null);
select charset(a), collation(a), coercibility(a) from t1;
charset(a) collation(a) coercibility(a)
latin2 latin2_general_ci 2
drop table t1;
select charset(null), collation(null), coercibility(null);
charset(null) collation(null) coercibility(null)
binary binary 5
select SUBSTR('abcdefg',3,2);
SUBSTR('abcdefg',3,2)
cd