The CASE statement should be used only to clearly define some new branches in the control flow. As soon as a WHEN clause
contains too many statements this highly decreases the readability of the overall control flow statement. In such case, the content of
WHEN clause should be extracted in a dedicated function.
Noncompliant code example
CASE my_variable
WHEN 0 THEN -- 6 lines till next WHEN
procedure1;
procedure2;
procedure3;
procedure4;
procedure5;
WHEN 1 THEN
-- ...
END CASE;
Compliant solution
DECLARE
PROCEDURE do_something AS
BEGIN
procedure1;
procedure2;
procedure3;
procedure4;
procedure5;
END;
BEGIN
CASE my_variable
WHEN 0 THEN
do_something;
WHEN 1 THEN
-- ...
END CASE;
END;
/
