[jira] [Created] (CALCITE-4439) how to avoid query database column meta when I execute select query

wudejin created CALCITE-4439: Summary: how to avoid query database column meta when I execute select query Key: CALCITE-4439 URL: https://issues.apache.org/jira/browse/CALCITE-4439 Project: Calcite

Re: [Question] How to leverage Calcite adaptor for federated SQL query without using Calcite parser

Hi all, Respond by myself. After digging into the Calcite project, I figured out how to do SQL federation with an external SQL parser. Federated SQL[1] is a demo to join SQLs from different database instances and shows users a basic process of parse(), validate(), optimize(), and execute()