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Bug#57810 case/when/then : Assertion failed: length || !scale

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ASSERT happens due to improper calculation of the max_length
in Item_func_div object, if dividend has max_length == 0 then
Item_func_div::max_length is set to 0 under some circumstances.
The fix:
If decimals == NOT_FIXED_DEC then set
Item_func_div::max_length to max possible
DOUBLE length value.


mysql-test/r/func_math.result:
  test case
mysql-test/t/func_math.test:
  test case
sql/item_func.cc:
  The fix:
  If decimals == NOT_FIXED_DEC then set
  Item_func_div::max_length to max possible
  DOUBLE length value.
This commit is contained in:
Sergey Glukhov
2010-12-24 14:05:04 +03:00
parent 8bb9639486
commit bc56dcea9d
3 changed files with 29 additions and 2 deletions
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9
mysql-test/t/func_math.test
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@@ -315,4 +315,13 @@ SELECT -9223372036854775808 DIV -1;
SELECT -9223372036854775808 MOD -1;
SELECT -9223372036854775808999 MOD -1;
--echo #
--echo # Bug#57810 case/when/then : Assertion failed: length || !scale
--echo #
SELECT CASE(('')) WHEN (CONVERT(1, CHAR(1))) THEN (('' / 1)) END;
CREATE TABLE t1 SELECT CAST((CASE(('')) WHEN (CONVERT(1, CHAR(1))) THEN (('' / 1)) END) AS CHAR) as C;
SHOW CREATE TABLE t1;
DROP TABLE t1;
--echo End of 5.1 tests