HV006ERRORTier 2 — Caution✅ HIGH confidenceFDW invalid data type descriptors
Category: Foreign Data Wrapper ErrorVersions: All Postgres versions (with FDW extension)
What this means
SQLSTATE HV006 is raised when a foreign data wrapper receives type descriptor information from the remote source that is inconsistent or invalid.
Why it happens
- 1The remote server returns type metadata that is incompatible with the FDW type descriptor expectations
How to reproduce
Type descriptor mismatch in a FDW query.
trigger — this will ERROR
ERROR: invalid data type descriptor
Fix 1: Verify the foreign table column type definitions match the remote schema
When HV006 appears.
fix
-- Re-import the remote schema to refresh type information:
IMPORT FOREIGN SCHEMA public FROM SERVER remote_pg INTO local_schema;Why this works
IMPORT FOREIGN SCHEMA refreshes the foreign table definitions from the remote schema, ensuring type descriptors are current.
Sources
📚 Official docs: https://www.postgresql.org/docs/current/errcodes-appendix.html
🔧 Source ref: Class HV — Foreign Data Wrapper Error
Confidence assessment
✅ HIGH confidence
Standard SQLSTATE. Stable across versions.
See also
🔗 Related errors
📄 Reference pages
IMPORT FOREIGN SCHEMApostgres_fdw
⚙️ This error reference was generated with AI assistance and reviewed for accuracy. Examples are provided to illustrate common scenarios and may not cover every case. Always test fixes in a development environment before applying to production. Spotted an error? Suggest a correction →