| about pls_integer [message #1794] |
Thu, 30 May 2002 07:00  |
pavani
Messages: 32
Registered: April 2002
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Member |
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can any body plz help me knowing about pls_integer in pl/sql...where it shoiuld be used an so...
any help 'll be apreciated
thanks
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| Re: about pls_integer [message #1796 is a reply to message #1794] |
Thu, 30 May 2002 08:44  |
Todd Barry
Messages: 4819
Registered: August 2001
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Senior Member |
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From the docs:
You use the PLS_INTEGER datatype to store signed integers. Its magnitude range is -2**31 .. 2**31. PLS_INTEGER values require less storage than NUMBER values. Also, PLS_INTEGER operations use machine arithmetic, so they are faster than NUMBER and BINARY_INTEGER operations, which use library arithmetic. For efficiency, use PLS_INTEGER for all calculations that fall within its magnitude range.
Although PLS_INTEGER and BINARY_INTEGER have the same magnitude range, they are not fully compatible. When a PLS_INTEGER calculation overflows, an exception is raised. However, when a BINARY_INTEGER calculation overflows, no exception is raised if the result is assigned to a NUMBER variable.
Because of this small semantic difference, you might want to continue using BINARY_INTEGER in old applications for compatibility. In new applications, always use PLS_INTEGER for better performance.
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