You cannot traverse an associative array until elements are initialized. Table of varchar2 element count.
What is INDEX_BY_BINARY_INTEGER?
But look at the link below: Assign the character index to a variable. Allocate space as you increment the index. You cannot traverse an associative array until elements are initialized. Dynamic initialization and assignment in the execution section.
Define 'table of varchar2' as data type and insert data. Table of varchar2 element count. Delete element in table of varchar2. Table of varchar2 delete all. Insert elements into table of varchar2. Clear the table of varchar2. Assign value to table records. Reference count property of table record. Call delete method with number on table record. Call delete method on table record. Assign value to table record after delete method call. Assing an empty table record to non-empty table record. Note that the key values are not sequential.
Assign value to varchar2 collection by index.