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Bug#45152 crash with round() function on longtext column in a derived table

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The crash happens due to wrong max_length value which is set on
Item_func_round::fix_length_and_dec() stage. The value is set to
args[0]->max_length which is too big in case of LONGTEXT(LONGBLOB) fields.
The fix is to set max_length using float_length() function.
This commit is contained in:
Sergey Glukhov
2009-06-02 11:38:13 +05:00
parent 8787989473
commit 83ec6e0592
3 changed files with 18 additions and 2 deletions
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9
mysql-test/t/func_math.test
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@ -250,4 +250,13 @@ SELECT a, ROUND(a) FROM t1;
DROP TABLE t1;
#
# Bug#45152 crash with round() function on longtext column in a derived table
#
CREATE TABLE t1(f1 LONGTEXT) engine=myisam;
INSERT INTO t1 VALUES ('a');
SELECT 1 FROM (SELECT ROUND(f1) AS a FROM t1) AS s WHERE a LIKE 'a';
SELECT 1 FROM (SELECT ROUND(f1, f1) AS a FROM t1) AS s WHERE a LIKE 'a';
DROP TABLE t1;
--echo End of 5.0 tests