psql=# drop operator  if exists =~         (text, text);
psql=# drop function  if exists pcre_match (text, text);
psql=# create function pcre_match (text, text) returns bool
    language plperl immutable leakproof strict parallel safe as $$
    return $_[0] =~ $_[1] ? 1 : 0;
    $$;
psql=# create operator =~ (function = pcre_match, leftarg = text, rightarg = text);

my @items = getfromdb ("select id, text from table where text =~ '$kwre'");