Query Run
select '10.1.2.3' regexp '^\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.(?:xxx|\\d{1,3})$'; 8 years ago
select '10.1.2.3' regexp '^{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.(?:xxx|\\d{1,3})$'; 8 years ago
select '10.1.2.3' regexp '^\d{1,3}\.\d{1,3}\.\d{1,3}\.(?:xxx|\d{1,3})$'; 8 years ago
select page_title from page where page_namespace = 2 and page_title regexp... 8 years ago