HV007ERRORTier 2 — Caution✅ HIGH confidence

FDW invalid column name

Category: Foreign Data Wrapper ErrorVersions: All Postgres versions (with FDW extension)

What this means

SQLSTATE HV007 is raised when a foreign data wrapper receives a column name from the remote source that is invalid or cannot be mapped to a valid Postgres identifier.

Why it happens

1Remote table column names contain characters that are invalid in Postgres identifiers without quoting
2FDW column name mapping failure due to encoding or special character issues

How to reproduce

Remote column name with invalid characters.

trigger — this will ERROR

ERROR: FDW invalid column name

Fix 1: Quote or remap column names in the foreign table definition

When the remote column name contains special characters.

fix

CREATE FOREIGN TABLE remote_data (
  "column-with-dash" TEXT OPTIONS (column_name 'column-with-dash')
) SERVER remote_pg OPTIONS (table_name 'remote_table');

Why this works

Quoting the foreign column name and using the column_name option maps the remote name to a valid Postgres identifier.

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.