The mappings for IsDigit(), IsLetter() and IsLetterOrDigit() for Oracle don't work correctly, since Oracle's LIKE doesn't support regular expressions. REGEXP_LIKE might be used instead (at least for Oracle 10 and later).
Jon
IsLetter/Digit in Oracle
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Defect Reported
Hi Jon,
Thank you for the suggested alternative, I have added this to the defect list.
Bryn Rhodes
Database Consulting Group LLC