cloud-fan commented on issue #25291: [SPARK-28554][SQL] implement basic catalog functionalities for JDBC v2 with a DS v1 fallback API URL: https://github.com/apache/spark/pull/25291#issuecomment-516092330 IIUC #25211 is invisible to end-users: the way to use JDBC data source is still the same. But it does have values in the long term: code clean up, more optimization opportunity, performance, etc. This PR is to allow users to use JDBC source in the data source v2 way, i.e. register custom catalog and create/access tables directly. It only implements the basic catalog functionalities. In general, we need both PRs but this one is smaller and visible to end-users, which probably should be reviewed first.
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