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Merge gleb.loc:/home/uchum/work/bk/PA/5.0-opt-31019

Browse source 
into  gleb.loc:/home/uchum/work/bk/5.1-opt
This commit is contained in:
gshchepa/uchum@gleb.loc 2007-10-15 14:18:26 +05:00
commit 88aa7b0a6e
3 changed files with 16 additions and 1 deletions
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6
mysql-test/r/type_decimal.result
View file

@ -799,3 +799,9 @@ SELECT ROUND(qty,3), dps, ROUND(qty,dps) FROM t1;
ROUND(qty,3) dps ROUND(qty,dps)
1.133 3 1.133
DROP TABLE t1;
SELECT 1 % .123456789123456789123456789123456789123456789123456789123456789123456789123456789 AS '%';
%
0.012345687012345687012345687012345687012345687012345687012345687012345687000000000
SELECT MOD(1, .123456789123456789123456789123456789123456789123456789123456789123456789123456789) AS 'MOD()';
MOD()
0.012345687012345687012345687012345687012345687012345687012345687012345687000000000

8
mysql-test/t/type_decimal.test
View file

@ -408,3 +408,11 @@ INSERT INTO t1 VALUES (1.1325,3);
SELECT ROUND(qty,3), dps, ROUND(qty,dps) FROM t1;
DROP TABLE t1;
#
# Bug#31019: MOD() function and operator crashes MySQL when
# divisor is very long and < 1
#
SELECT 1 % .123456789123456789123456789123456789123456789123456789123456789123456789123456789 AS '%';
SELECT MOD(1, .123456789123456789123456789123456789123456789123456789123456789123456789123456789) AS 'MOD()';

3
strings/decimal.c
View file

@ -2329,11 +2329,12 @@ static int do_div_mod(decimal_t *from1, decimal_t *from2,
}
if (unlikely(intg0+frac0 > to->len))
{
stop1-=to->len-frac0-intg0;
stop1-=frac0+intg0-to->len;
frac0=to->len-intg0;
to->frac=frac0*DIG_PER_DEC1;
error=E_DEC_TRUNCATED;
}
DBUG_ASSERT(buf0 + (stop1 - start1) <= to->buf + to->len);
while (start1 < stop1)
*buf0++=*start1++;
}