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COALESCE now aggregates its argument types in this way:

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if some of the arguments is STRING_RESULT the STRING_RESULT
else if some of the arguments is REAL_RESULT then REAL_RESULT
else INT_RESULT
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unknown
2003-07-14 19:28:36 +05:00
parent e7360f4989
commit 6b001731c1
3 changed files with 49 additions and 0 deletions
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21
mysql-test/r/case.result
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@ -71,3 +71,24 @@ orange
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drop table t1;
SET NAMES latin1;
CREATE TABLE t1 SELECT COALESCE(_latin1'a',_latin2'a');
ERROR HY000: Illegal mix of collations (latin1_swedish_ci,COERCIBLE) and (latin2_general_ci,COERCIBLE) for operation 'coalesce'
CREATE TABLE t1 SELECT COALESCE('a' COLLATE latin1_swedish_ci,'b' COLLATE latin1_bin);
ERROR HY000: Illegal mix of collations (latin1_swedish_ci,EXPLICIT) and (latin1_bin,EXPLICIT) for operation 'coalesce'
CREATE TABLE t1 SELECT
COALESCE(1), COALESCE(1.0),COALESCE('a'),
COALESCE(1,1.0), COALESCE(1,'1'),COALESCE(1.1,'1'),
COALESCE('a' COLLATE latin1_bin,'b');
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`COALESCE(1)` int(1) NOT NULL default '0',
`COALESCE(1.0)` double(3,1) NOT NULL default '0.0',
`COALESCE('a')` char(1) NOT NULL default '',
`COALESCE(1,1.0)` double(3,1) NOT NULL default '0.0',
`COALESCE(1,'1')` char(1) NOT NULL default '',
`COALESCE(1.1,'1')` char(3) NOT NULL default '',
`COALESCE('a' COLLATE latin1_bin,'b')` char(1) character set latin1 collate latin1_bin NOT NULL default ''
) TYPE=MyISAM CHARSET=latin1
DROP TABLE t1;