in jdbc-grpc-client/src/main/java/org/apache/kyuubi/grpc/client/SimpleBlockingJdbcClient.java [43:53]
public DirectStatusResp openConnection(
Map<String, String> configs,
Optional<String> connectionId) {
ConnectionHandle.Builder builder = ConnectionHandle.newBuilder();
connectionId.ifPresent(builder::setId);
OpenConnectionReq req = OpenConnectionReq.newBuilder()
.setConnectionId(builder.build())
.putAllConfigs(configs)
.build();
return connectionBlockingStub.openConnection(req);
}