Single quotes are only required when: a) The value contains special characters like spaces b) The value must contain lower-case characters (and CASE(*MIXED) is not specified)I think point b) contradicts that first bit. It seems to me that, if I understand correctly, the solution to the problem that the developer had (which is a variable being interpreted as a literal if the & is forgotten) is to use mixed case for variables.
Maybe I misunderstand what you are saying, but the point of b) is that text literals are interpreted as (converted to?) upper case unless you enclose them in single quotes.
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