strongduanmu commented on issue #13285: URL: https://github.com/apache/shardingsphere/issues/13285#issuecomment-951709928
Since both `db-discovery` and `readwrite-splitting` are dataSource enhance rules, `SingleTableRule` will aggregate data sources in reverse order during initialization. When the `readwrite-splitting` rule is processed, data sources in `db-discovery` will be parsed out, which result in aggregated pipeline cannot be connected.  According to rules of pipeline delivery, the result here should be logical data source of `db-discovery`, that is `pr_ds`. However, there are also problems with this logic. When routing, `readwrite-splitting` will route the `rd_rs` logical data source to `pr_ds`, and then pass it to `db-discovery` for routing, but `db-discovery `module does not have the capability of readwrite routing, so the result is still incorrect. Considering that `db-discovery` has no readwrite routing capabilities, I think it’s better not to aggregate data sources for it. The data sources configured in `db-discovery` rules are directly passed to `readwrite-splitting` for use, so that the logic can be correct during routing. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
