feature_not_supported Feature Not Supported — SQLSTATE 0A000

The requested feature is not supported in this context or version.

• The error is written to the server log and returned to the client carrying SQLSTATE 0A000.
• Any driver (libpq, JDBC, psycopg, npgsql, pgx) surfaces this code in its error object so you can branch on it programmatically.
• PL/pgSQL can trap it by name: EXCEPTION WHEN feature_not_supported THEN.

Severity: ERROR  |  PostgreSQL versions: 12, 13, 14, 15, 16, 17

Reproduce with the exact statement and read the full message in the server log (raise log_min_messages / set log_min_error_statement for more context).

PostgreSQL parsed the request but cannot perform it as written — the feature is unavailable here.

Common causes:

• Using a clause unsupported on this object (for example certain ALTER operations).
• A feature that exists only in a newer PostgreSQL version.
• An operation not allowed on a view, foreign table, or partition.

Steps to resolve 0A000:

1. Check the documentation for the exact statement and your version.
2. Rewrite using a supported alternative (for example recreate instead of an unsupported ALTER).
3. Upgrade PostgreSQL if the feature was added in a later release.

Reference: PostgreSQL error codes — Class 0A (Feature Not Supported).