EC
HV00L
PostgreSQLERRORNotableForeign Data Wrapper ErrorHIGH confidence

fdw_unable_to_create_execution

What this means

A foreign data wrapper was unable to create an execution context or statement on the remote server, preventing the query from running.

Why it happens
  1. 1Remote server rejected the statement preparation request
  2. 2Insufficient privileges on the remote server to execute the query
  3. 3Remote server resource limits reached (max connections, max prepared statements)
  4. 4FDW internal error creating the execution environment
How to reproduce

Initiating a query against a foreign table

trigger — this will error
trigger — this will error
SELECT * FROM my_foreign_table WHERE id = 1;

expected output

ERROR:  HV00L: fdw_unable_to_create_execution

Fix

Check remote server permissions and resources

WHEN Remote server rejects execution

Check remote server permissions and resources
SELECT * FROM pg_user_mappings WHERE srvname = 'myserver';

Why this works

Ensures the mapped user has SELECT privileges on the remote tables

What not to do

✕ Do not ignore this error as transient

Usually indicates a persistent permission or resource problem on the remote server

Sources
Official documentation ↗

https://www.postgresql.org/docs/current/errcodes-appendix.html

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