EC
HV000
PostgreSQLERRORNotableForeign Data Wrapper ErrorHIGH confidence

FDW error

What this means

SQLSTATE HV000 is the generic foreign data wrapper (FDW) error code raised when an error occurs in a foreign data wrapper that does not map to a more specific HVxxx code. It indicates a problem communicating with or accessing a foreign data source.

Why it happens
  1. 1A generic error in a foreign data wrapper (postgres_fdw, file_fdw, oracle_fdw, etc.)
  2. 2Remote server connection failure in postgres_fdw
  3. 3Foreign data source returns an error not covered by a more specific code
How to reproduce

Query on a foreign table when the remote server is unreachable.

trigger — this will error
trigger — this will error
SELECT * FROM foreign_orders; -- remote server is down

expected output

ERROR:  could not connect to server "remote_server"

Fix

Check the foreign server connectivity and credentials

WHEN When HV000 is raised on a foreign table query.

Check the foreign server connectivity and credentials
-- Test connectivity to the foreign server:
SELECT * FROM dblink('host=remote_host dbname=remotedb', 'SELECT 1') AS t(result INT);

Why this works

Verify the foreign server is reachable, the credentials in the user mapping are correct, and the foreign server definition matches the remote Postgres configuration.

Sources
Official documentation ↗

Class HV — Foreign Data Wrapper Error

Content generated with AI assistance and reviewed for accuracy. Found an error? hello@errcodes.dev

← All PostgreSQL errors