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Fix CAST(1.0e+300 TO SIGNED). (Bug #13344)

Browse Source 
mysql-test/r/cast.result:
  Update results
mysql-test/t/cast.test:
  Add regression test
sql/item.h:
  Cap Item_real::val_int() to LONGLONG_MIN and LONGLONG_MAX.
This commit is contained in:
unknown
2005-09-22 15:59:13 -07:00
parent 443b394fc3
commit 13fa84a7e2
3 changed files with 16 additions and 0 deletions
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3
mysql-test/r/cast.result
View File

@@ -252,3 +252,6 @@ cast(repeat('1',20) as signed)
-7335632962598440505
Warnings:
Warning 1105 Cast to signed converted positive out-of-range integer to it's negative complement
select cast(1.0e+300 as signed int);
cast(1.0e+300 as signed int)
9223372036854775807

5
mysql-test/t/cast.test
View File

@@ -143,4 +143,9 @@ select cast(concat('184467440','73709551615') as signed);
select cast(repeat('1',20) as unsigned);
select cast(repeat('1',20) as signed);
#
# Bug #13344: cast of large decimal to signed int not handled correctly
#
select cast(1.0e+300 as signed int);
# End of 4.1 tests

8
sql/item.h
View File

@@ -703,6 +703,14 @@ public:
longlong val_int()
{
DBUG_ASSERT(fixed == 1);
if (value <= (double) LONGLONG_MIN)
{
return LONGLONG_MIN;
}
else if (value >= (double) (ulonglong) LONGLONG_MAX)
{
return LONGLONG_MAX;
}
return (longlong) (value+(value > 0 ? 0.5 : -0.5));
}
String *val_str(String*);