Name
ORA-12727: invalid back reference in regular expression
Synopsis
You wrote a backreference to a subexpression that does not exist, or
that does not yet exist. For example, '\1' is
invalid because there is no subexpression to reference. On the other
hand, '\1(abc)' is invalid because the
backreference precedes the subexpression to which it refers. Verify
that all your backreferences are valid, and that they always refer to
preceding subexpressions.
Get Oracle Regular Expressions Pocket Reference now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
