Re: finding bogus UTF-8

On Thu, Feb 10, 2011 at 1:02 PM, Scott Ribe <scott_ribe(at)elevated-dev(dot)com> wrote:
> I know that I have at least one instance of a varchar that is not valid UTF-8, imported from a source with errors (AMA CPT files, actually) before PG's checking was as stringent as it is today. Can anybody suggest a query to find such values?

If you know which table and column the data is in, you can also do
something like this:

(I typed this up without checking the syntax of it. The basic idea is
to cast the column as bytea, encode with the 'escape' method, then
grep for back-slashes).

select * from bad_table where regexp_match (encode (bad_column::bytea,
'escape'), '\\\\'));