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Bug #19372926 : 5.5.38 FAILS FUNC_MATH MTR TEST.

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Issue :
-------
This seems for some platform -(LONGLONG_MIN) is
not flagged as out of range.

Fix:
----
Fix is backported from mysql-5.6 bug 14314156.
Fixed by adding an explicit test for this value in
Item_func_neg::int_op().

sql/item_func.cc:
  For some platforms we need special handling of
  LONGLONG_MIN to guarantee overflow.
This commit is contained in:
mithun 2014-11-03 18:10:28 +05:30
parent a265914018
commit 73b99f055e
2 changed files with 10 additions and 3 deletions
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8
sql/item_func.cc
View File

@ -1760,7 +1760,13 @@ longlong Item_func_neg::int_op()
if ((null_value= args[0]->null_value))
return 0;
if (args[0]->unsigned_flag &&
(ulonglong) value > (ulonglong) LONGLONG_MAX + 1)
(ulonglong) value > (ulonglong) LONGLONG_MAX + 1ULL)
return raise_integer_overflow();
// For some platforms we need special handling of LONGLONG_MIN to
// guarantee overflow.
if (value == LONGLONG_MIN &&
!args[0]->unsigned_flag &&
!unsigned_flag)
return raise_integer_overflow();
return check_integer_overflow(-value, !args[0]->unsigned_flag && value < 0);
}

5
sql/item_func.h
View File

@ -1,7 +1,7 @@
#ifndef ITEM_FUNC_INCLUDED
#define ITEM_FUNC_INCLUDED
/* Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
/* Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@ -251,7 +251,8 @@ public:
inline longlong check_integer_overflow(longlong value, bool val_unsigned)
{
if ((unsigned_flag && !val_unsigned && value < 0) ||
(!unsigned_flag && val_unsigned && (ulonglong) value > LONGLONG_MAX))
(!unsigned_flag && val_unsigned &&
(ulonglong) value > (ulonglong) LONGLONG_MAX))
return raise_integer_overflow();
return value;
}