How to create text search configuration if not exists on PostgreSQL?

Question

How to create text search configuration but only when it doesn't exists? For instance, like the other create statements:

CREATE TEXT SEARCH CONFIGURATION IF NOT EXISTS text_without_accent (COPY = simple);

Answer 1

Use a DO statement and capture errors:

DO
$$BEGIN
   CREATE TEXT SEARCH CONFIGURATION ...
EXCEPTION
   WHEN unique_violation THEN
      NULL;  -- ignore error
END;$$;