1-9. Referring to Variables from Nested Blocks
Problem
A variable that is defined in an outer code block needs to be used within an inner block. However, there is also a variable of the same name within the inner block. Thus, two variables with the same name are in scope, and you need a mechanism for differentiating between them.
Solution
Label the code blocks, and use the labels to qualify the variable references. For instance, if a variable dept_name is defined in an outer code block, which is labeled outer_block, then you can use the fully qualified name outer_block.dept_name to reference that variable. Let's take a look at an example:
<<outer_block>>
DECLARE
mgr_id NUMBER(6) := '¤t_manager_id';
dept_count number := 0; BEGIN ...Get Oracle and PL/SQL Recipes: A Problem-Solution Approach now with the O’Reilly learning platform.
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