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Fix for BUG#7455.

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The fix checks if the trim string argument is NULL. If so, the standard
mandates that the function result must be also NULL.
This commit is contained in:
timour@mysql.com
2004-12-28 11:57:56 +02:00
parent fbc96c79a1
commit 064c73490b
3 changed files with 24 additions and 1 deletions
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8
mysql-test/t/func_str.test
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@ -435,3 +435,11 @@ drop table t1;
select quote(ltrim(concat(' ', 'a')));
select quote(trim(concat(' ', 'a')));
#
# Bug#7455 unexpected result: TRIM(<NULL> FROM <whatever>) gives NOT NULL
# According to ANSI if one of the TRIM arguments is NULL, then the result
# must be NULL too.
#
select trim(null from 'kate') as "must_be_null";
select trim('xyz' from null) as "must_be_null";