G-2180: Never use quoted identifiers.

Major

Maintainability

Reason

Quoted identifiers make your code hard to read and maintain.

Example (bad)

DECLARE
   "sal+comm" INTEGER;
   "my constant" CONSTANT INTEGER := 1;
   "my exception" EXCEPTION;
BEGIN
   "sal+comm" := "my constant";
EXCEPTION
   WHEN "my exception" THEN
      NULL;
END;
/

Example (good)

DECLARE
   l_sal_comm     INTEGER;
   co_my_constant CONSTANT INTEGER := 1;
   e_my_exception EXCEPTION;   
BEGIN
   l_sal_comm := co_my_constant;
EXCEPTION
   WHEN e_my_exception THEN
      NULL;
END;
/