King Oracle - Number(5,0) with negative values return 0

[croux]

I have a Field Number(5,0), each value is between 0 and -10, When I use ​http://localhost/mapguide/schemareport/describeschema.php (View data) or make a thematic with this field, all values become 0.

With Autodesk providers I have the real value (0 to -10)

I have another table with a field number(10,0). (values between 0 to 26000) all think OK the describeschema.php return all rows with good values. But if I execute the sql query 'update table set myfield=-myfield' --> (values between 0 to -26000) the describeschema.php return no row : Total Entries: -1