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Bug#57477 SIGFPE when dividing a huge number a negative number

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The problem is dividing by const value when
the result is out of supported range.
The fix:
-return LONGLONG_MIN if the result is out of supported range for DIV operator.
-return 0 if divisor is -1 for MOD operator.


mysql-test/r/func_math.result:
  test case
mysql-test/t/func_math.test:
  test case
sql/item_func.cc:
  -return LONGLONG_MIN if the result is out of supported range for DIV operator.
  -return 0 if divisor is -1 for MOD operator.
This commit is contained in:
Sergey Glukhov 2010-10-27 18:12:10 +04:00
commit c7371c9e75
3 changed files with 32 additions and 6 deletions
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16
mysql-test/r/func_math.result
View file

@ -482,4 +482,20 @@ RAND(i)
0.155220427694936
DROP TABLE t1;
#
# Bug#57477 SIGFPE when dividing a huge number a negative number
#
SELECT -9999999999999999991 DIV -1;
-9999999999999999991 DIV -1
-9223372036854775808
Warnings:
Error 1292 Truncated incorrect DECIMAL value: ''
SELECT -9223372036854775808 DIV -1;
-9223372036854775808 DIV -1
-9223372036854775808
SELECT -9223372036854775808 MOD -1;
-9223372036854775808 MOD -1
0
SELECT -9223372036854775808999 MOD -1;
-9223372036854775808999 MOD -1
0
End of 5.1 tests