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Oracle LIMIT method
In Oracle PL/SQL, the LIMIT method is a function that returns the maximum number of elements that a collection can have. If the collection does not have the maximum number of elements, LIMIT returns NULL. Only Varray has the maximum size.
Syntax of the LIMIT collection method in Oracle PL/SQL
collection_name.LIMIT;
Parameters or arguments
- collection_name – the name of the collection.
- LIMIT – maximum number of elements that the collection can have.
Consider an example to understand how to use the LIMIT collection method in Oracle PL/SQL.
An example which outputs LIMIT and COUNT values for Associative Arrays with four elements, Varray with two elements and Nested Tables with three elements.
DECLARE
TYPE aa_type IS TABLE OF INTEGER INDEX BY PLS_INTEGER;
aa aa_type; -- associative array
TYPE va_type IS VARRAY(4) OF INTEGER;
va va_type := va_type(2,4); -- varray
TYPE nt_type IS TABLE OF INTEGER;
nt nt_type := nt_type(1,3,5); -- nested table
BEGIN
aa(1):=3; aa(2):=6; aa(3):=9; aa(4):= 12;
DBMS_OUTPUT.PUT('aa.COUNT = '); print(aa.COUNT);
DBMS_OUTPUT.PUT('aa.LIMIT = '); print(aa.LIMIT);
DBMS_OUTPUT.PUT('va.COUNT = '); print(va.COUNT);
DBMS_OUTPUT.PUT('va.LIMIT = '); print(va.LIMIT);
DBMS_OUTPUT.PUT('nt.COUNT = '); print(nt.COUNT);
DBMS_OUTPUT.PUT('nt.LIMIT = '); print(nt.LIMIT);
END;
Result:
aa.COUNT = 4
aa.LIMIT = NULL
va.COUNT = 2
va.LIMIT = 4
nt.COUNT = 3
nt.LIMIT = NULL
PL/SQL tutorial: PL/SQL Collection Method LIMIT in Oracle Database
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