PLS INTEGER
From Oracle FAQ
PLS_INTEGER is a PL/SQL data type used for storing signed integers. PLS_INTEGER is defined in the STANDARD package as a subtype (or rather a synonym) of BINARY_INTEGER. Variables declared as PLS_INTEGER can be assigned values between -2**31 to 2**31-1 (-2,147,483,648 to 2,147,483,647).
PLS_INTEGER operations use machine arithmetic, so they are generally faster than NUMBER and INTEGER operations.
History[edit]
Prior to Oracle 10g PLS_INTEGER were faster than BINARY_INTEGER. However, starting from Oracle 10g, PLS_INTEGER and BINARY_INTEGER are identical and can be used interchangeably.
Examples[edit]
DECLARE TYPE my_array_t IS TABLE OF VARCHAR2(100) INDEX BY PLS_INTEGER; ...
Also see[edit]
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