Native TCP interface ​

The native interface provides a stateful CoordinatorDB connection. Its default listener is 127.0.0.1:7400.

Use the supplied client. ClickHouse, PostgreSQL and SQLite wire clients are not compatible with the native protocol.

Authentication and state ​

Every connection authenticates a configured username and password before SQL is accepted. It retains the selected database, transaction state and temporary objects until disconnection.

The native API can also carry positional values beside the SQL text. Those values are excluded from the logged SQL text.

Transport and limits ​

Native transport has no TLS. Use trusted connectivity or an external secure tunnel for credentials in transit.

Ordinary SQL/control requests and responses are limited to 16 MiB. Client stdin and INFILE uploads have no total input-size ceiling; admission, response and request-processing limits still apply.

Client ​

Use the native client for interactive SQL, exact-byte output and file input. See network settings for listener overrides and transactions for connection lifetime.