HV024 signals that a foreign data wrapper option or column attribute contains an invalid value during definition or execution.
PostgreSQL fdw_invalid_attribute_value (HV024) occurs when a foreign table, server, or column option holds an invalid value. Validate option names, data types, and permitted ranges, then recreate or ALTER the object with a correct value to resolve the error.
PostgreSQL Error HV024 (fdw_invalid_attribute_value)
PostgreSQL raises error code HV024 with the condition name fdw_invalid_attribute_value when it detects an invalid value for an option or attribute defined on a foreign server, user mapping, or foreign table column.
The error can appear while creating or altering foreign objects, or during query execution when PostgreSQL parses stored options.
Fixing it quickly prevents blocked queries and broken ETL pipelines.
The error surfaces during CREATE or ALTER statements that set OPTIONS, as well as at runtime if the foreign data wrapper rewrites an option and finds it malformed. FDWs such as postgres_fdw, file_fdw, mysql_fdw, and jdbc_fdw all propagate the check.
Invalid FDW attributes stop foreign tables from loading, break cross-database joins, and may cascade to application outages.
Correcting the option restores seamless federated access and ensures data consistency.
Using an unsupported option name or supplying a string where an integer is expected immediately triggers HV024.
Specifying out-of-range numeric values, such as negative fetch_size, also produces the error.
Typos in column-level OPTIONS or using quotes incorrectly confuse the FDW and lead to invalid attribute errors.
Identify the failing object with SHOW CREATE or pg_foreign_table view, then correct the option value and redeploy.
Cast numeric strings properly and use parameter placeholders where the FDW expects integers.
After updates, ANALYZE the foreign table to refresh statistics and confirm the fix.
postgres_fdw rejects fetch_size set to 'abc'.
Change it to a positive integer like 1000.
file_fdw fails when format option is 'CSVX'. Switch to 'csv' or 'text'.
Validate FDW option names against the official documentation during code review.
Store option constants in configuration files and lint them in CI to catch typos before deployment.
fdw_unable_to_establish_connection (HV00A) signals connection issues instead of attribute problems.
fdw_invalid_option_name (HV021) occurs when the option key is unknown, not the value.
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No. Any FDW that validates options can raise HV024, including mysql_fdw and jdbc_fdw.
No. PostgreSQL blocks access until the invalid option is fixed.
Yes. Galaxy's editor lints CREATE/ALTER statements and flags invalid FDW options before execution.
Yes. Proper fetch_size improves batch retrieval efficiency. Always test changes in staging.
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