Limitations
REAL value ranges:
- Smallest REAL value: -3.402E+38
- Largest REAL value: 3.402E+38
- Smallest positive REAL value: 1.175E-37
- Largest negative REAL value: -1.175E-37
These limits are different from the java.lang.Float Java
type limits.
An exception is thrown when any double value is calculated
or entered that is outside of these value ranges. Arithmetic operations do
not round their resulting values to zero. If the values are too small,
you will receive an exception. The arithmetic operations take place with double
arithmetic in order to detect under flows.
Numeric floating point constants
are limited to a length of 30 characters.
-- this example will fail because the constant is too long:
values 01234567890123456789012345678901e0;
When
mixed with other data types in expressions, the resulting data type follows
the rules shown in Numeric type promotion in expressions.
See
also Storing values of one numeric data type in columns of another numeric data type.
Constants always
map to DOUBLE PRECISION; use a CAST to convert a constant to a REAL.
