Perl Compatible Regular Expressions (PCRE) extension for PostgreSQL

 This is a module for PostgreSQL that exposes Perl-compatible regular
 expressions (PCRE) functionality as functions and operators. It is based on
 the popular PCRE library.
 .
 Some possible advantages over the regular expression support built into
 PostgreSQL:
  * richer pattern language, more familiar to Perl and Python programmers
  * complete Unicode support
  * saner operators and functions
 Some disadvantages:
  * no repeated matching ('g' flag)
  * no index optimization