Re: chr(3) and 3::text

First place to start given two things you may or may not know what they are is the index in the documentation:

From there:

Definiton of chr()

Meaning of "::"

Knowing that your data is likely in UTF but that for lower numbers code points (below 256) it doesn't actually matter as it is standard ASCII assumes some level of knowledge too.

You seem to know that "Fillter" is text so neither of these seems particularly useful.  If you want to replace the string '3' in Filler with the empty string just write: replace(filler, '3', ''').

David J.