regex - Regular expression find and replace in Postgres

Question

I have a table that contains a number of rows with columns containing a URL. The URL is of the form:

http://one.example1.com:9999/dotFile.com

I would like to replace all matches in that column with http://example2.com/dotFile.com while retaining everything after :9999. I have found some documentation on regexp_matches and regexp_replace, but I can't quite wrap my head around it.

Answer 1

To replace a fixed string, use the simple replace() function.

To replace a dynamic string, you can use regexp_replace() like this:

UPDATE
  YourTable
SET
  TheColumn = regexp_replace(
    TheColumn, 'http://[^:s]+:9999(S+)', 'http://example2.com1', 'g'
  )