Postgresql tables exists, but getting “relation does not exist” when querying

Question

I have a postgresql db with a number of tables. If I query:

SELECT column_name
FROM information_schema.columns
WHERE table_name=\"my_table\";

Answer 1

I had the same problem that occurred after I restored data from a postgres dumped db.

My dump file had the command below from where things started going south.

    SELECT pg_catalog.set_config('search_path', '', false);

Solutions:

1. Probably remove it or change that false to be true.
2. Create a private schema that will be used to access all the tables.

The command above simply deactivates all the publicly accessible schemas.

Check more on the documentation here: https://www.postgresql.org/docs/9.3/ecpg-connect.html