Name
ORA-12725: unmatched parentheses in regular expression
Synopsis
You have mismatched parentheses in your expression. For example, an
expression like '(a' will cause this error.
Carefully check each subexpression to be sure you include both
opening and closing parentheses. Check to see whether
you’ve correctly escaped parentheses that do not
enclose subexpressions, and make sure you haven’t
inadvertently escaped a parentheses that should open or close a
subexpression.
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