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Fix for bug #27483: Casting 'scientific notation type' to 'unsigned

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bigint' fails on windows.

Visual Studio does not take into account some x86 hardware limitations
which leads to incorrect results when converting large DOUBLE values
to BIGINT UNSIGNED ones.

Fixed by adding a workaround for double->ulonglong conversion on
Windows.


include/config-win.h:
  Added double2ulonglong(double) function implementing a workaround for
  broken double->ulonglong conversion on Windows/x86.
include/my_global.h:
  Define double2ulonglong() as a simple typecast for anything but
  Windows.
mysql-test/r/type_float.result:
  Added a test case for bug #27483.
mysql-test/t/type_float.test:
  Added a test case for bug #27483.
This commit is contained in:
Alexey Kopytov
2008-12-03 19:15:39 +03:00
parent 7f9e0b9bfb
commit 91f0c94c23
4 changed files with 42 additions and 0 deletions
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13
mysql-test/r/type_float.result
View File

@ -392,4 +392,17 @@ f1 + 0e0
1.0000000150475e+30
-1.0000000150475e+30
drop table t1;
create table t1(d double, u bigint unsigned);
insert into t1(d) values (9.2233720368547777e+18),
(9.223372036854779e18),
(9.22337203685479e18),
(1.84e19);
update t1 set u = d;
select * from t1;
d u
9.22337203685478e+18 9223372036854775808
9.22337203685478e+18 9223372036854779904
9.22337203685479e+18 9223372036854790144
1.84e+19 18400000000000000000
drop table t1;
End of 5.0 tests

17
mysql-test/t/type_float.test
View File

@ -252,4 +252,21 @@ insert into t1 values (2e30), (-2e30);
select f1 + 0e0 from t1;
drop table t1;
#
# Bug #27483: Casting 'scientific notation type' to 'unsigned bigint' fails on
# windows.
#
create table t1(d double, u bigint unsigned);
insert into t1(d) values (9.2233720368547777e+18),
(9.223372036854779e18),
(9.22337203685479e18),
(1.84e19);
update t1 set u = d;
select * from t1;
drop table t1;
--echo End of 5.0 tests