EC
HV007
PostgreSQLERRORNotableForeign Data Wrapper ErrorHIGH confidence

FDW invalid column name

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

Remote column name with invalid characters.

expected output

ERROR:  FDW invalid column name

Fix

Quote or remap column names in the foreign table definition

WHEN When the remote column name contains special characters.

Quote or remap column names in the foreign table definition
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 documentation ↗

Class HV — Foreign Data Wrapper Error

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