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Bug #24947: REPEAT function returns NULL when passed a field as the count parameter

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Handling of large signed/unsigned values was not consistent, so some string functions could return bogus results.
The current fix is to simply patch up the val_str() methods for those string items.
It would be good clean this code up in general, to make similar problems much harder to make.  This is left as an exercise for the reader.


mysql-test/r/func_str.result:
  Update test results for bug #24947
mysql-test/t/func_str.test:
  Add test case for bug #24947
sql/item_strfunc.cc:
  Adjust some string function Items' val_str() methods to handle large signed/unsigned arguments properly
This commit is contained in:
unknown 2006-12-19 15:54:12 -07:00
commit f8920dd59f
3 changed files with 39 additions and 20 deletions
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12
mysql-test/r/func_str.result
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@ -1916,4 +1916,16 @@ CHAR(0xff,0x8f USING utf8) IS NULL
Warnings:
Error 1300 Invalid utf8 character string: 'FF8F'
SET SQL_MODE=@orig_sql_mode;
select substring('abc', cast(2 as unsigned int));
substring('abc', cast(2 as unsigned int))
bc
select repeat('a', cast(2 as unsigned int));
repeat('a', cast(2 as unsigned int))
aa
select rpad('abc', cast(5 as unsigned integer), 'x');
rpad('abc', cast(5 as unsigned integer), 'x')
abcxx
select lpad('abc', cast(5 as unsigned integer), 'x');
lpad('abc', cast(5 as unsigned integer), 'x')
xxabc
End of 5.0 tests