<p>MySQL raises Error 1430 when it cannot execute a statement against a foreign data source referenced by a FEDERATED table or other remote-access mechanism.</p>
<p>MySQL Error 1430: ER_QUERY_ON_FOREIGN_DATA_SOURCE means the server failed to run a query on a remote data source reached via FEDERATED or a similar engine. Verify network connectivity, credentials, and SQL compatibility on the foreign server to clear the error.</p>
There was a problem processing the query on the foreign
The error appears when MySQL forwards a statement to a foreign server through a FEDERATED table, MySQL FDW, or the MySQLX plugin and the remote side returns an error code.
MySQL converts the remote failure into local SQLSTATE HY000 and surface code 1430 so the client knows the issue lies outside the local instance.
It occurs during SELECT, INSERT, UPDATE, DELETE, or ALTER commands that reference a FEDERATED table or any storage engine relying on a remote ODBC or MySQL link.
Triggers, views, and stored procedures that touch foreign tables can raise the error even if the client query targets only local objects.
Unresolved foreign-data errors break cross-database reporting, replication, and ETL pipelines, leading to data gaps, application downtime, and delayed analytics.
Quick fixes minimize latency on production systems and keep distributed data sets consistent.
Network outages, DNS misconfiguration, or firewall rules can block the local server from reaching the foreign host.
Mismatched authentication or revoked privileges on the remote server deny statement execution and surface code 1430.
Start by running a simple SELECT against the remote table to see if connectivity is intact; if not, check ping and telnet on the port.
Review the FEDERATED connection string, confirm user credentials, and test them directly on the remote server.
If only large queries fail, increase the foreign server's max_allowed_packet and wait_timeout parameters so long-running statements complete.
When DML fails but SELECT works, ensure the remote account has INSERT, UPDATE, DELETE privileges and that binary logging allows the statement.
Use CONNECTION_NAME syntax to centralize remote credentials, rotate passwords regularly, and monitor sys.schema_table_statistics for latency spikes.
Galaxy's AI SQL copilot can validate connection strings and surface missing privileges before deployment, reducing runtime surprises.
Errors 1429 and 2003 also indicate connectivity problems; they differ by occurring during connection establishment rather than remote execution.
Error 1045 covers invalid credentials locally, while 1430 specifically signals the foreign side rejected the query.
TCP interruptions, firewall blocks, or VPN outages stop MySQL from reaching the foreign host, triggering error 1430.
Expired or mistyped usernames and passwords on the remote server cause authentication failures returned as 1430.
The remote engine may not support certain syntax or data types, returning an error that MySQL packages as ER_QUERY_ON_FOREIGN_DATA_SOURCE.
low max_allowed_packet, query timeouts, or disk full conditions on the foreign server lead to aborted statements that propagate back as 1430.
This error indicates the connection itself could not be established, unlike 1430 which fires after connection succeeds.
Error 2003 is client-side and appears when the client cannot reach the MySQL daemon at all.
Access denied errors occur locally; 1430 shows the foreign server denied or failed the statement.
Run the same statement directly on the foreign server. If it fails there, the issue is remote. If it succeeds remotely but fails through FEDERATED, inspect the connection string and user privileges.
No. Any storage engine or plugin that routes statements to an external server can surface 1430, including MySQL FDW for PostgreSQL or ODBC connectors.
Both ends must allow the packet size. Always raise the limit on the foreign host as well to avoid mismatched settings.
Galaxy validates connection strings, highlights privilege gaps, and offers AI suggestions to correct them before you execute the query, preventing runtime failures.
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