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Translating Non-PL/SQL Composite Types to PL/SQL Composite Types If you have code or business logic that uses another language, you can usually translate the array and set types of that language directly to PL/SQL collection types.For example: Example 5-1 defines a type of associative array indexed by string, declares a variable of that type, populates the variable with three elements, changes the value of one element, and prints the values (in sort order, not creation order).If the number of elements is unspecified, the maximum number of elements in the collection is the upper limit of the index type. It is available only in the block, and is stored in the database only if the block is in a standalone or package subprogram.(Standalone and package subprograms are explained in "Nested, Package, and Standalone Subprograms".) A collection type defined in a package specification is a .You can use scalar components wherever you can use scalar variables.PL/SQL lets you define two kinds of composite data types, collection and record.
If you change the value of either parameter after populating an associative array indexed by string, then the collection methods (described in "Collection Methods") might return unexpected values or raise exceptions.
The upper bound changes as you add or delete elements, but it cannot exceed the maximum size.
When you store and retrieve a varray from the database, its indexes and element order remain stable.
For information about the Note: Several examples in this chapter define procedures that print their composite variables.i