in reply to Error "'exists ^0^' has chars not alphanumeric or underscore in perl"
The error seems to be emanating from SQL::Parser - which looks like it is getting confused by the complex SQL syntax.
Try re-designing your SQL statement using UNION or INTERSECTION - maybe that will get past the Parser.
Sorry - I'm not a SQL guru, and dont know the syntax well enough to actually provide the alternative.
BTW - your attempt to clear the SQL of funny characters has a bug - it deletes the "%" after "Data%" - leading to potentially undesirable results.
The SQL string shown is clean to start with - it does not need the regex you have attempted to use.
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