[GitHub] [arrow-datafusion] returnString commented on issue #1836: Register multiple tables into `ExecutionContext` at once

[GitBox <gi...@apache.org>]

returnString commented on issue #1836:
URL: https://github.com/apache/arrow-datafusion/issues/1836#issuecomment-1041417998


   Yeah, my intent when adding the catalog/schema abstractions initially was to support exactly this use case 😊 You can compose an execution context with any crazy combination of catalog/schema providers (e.g. @alamb built a wrapper catalog that automatically builds an `information_schema` based on your _real_ catalog) which can then provide arbitrary `TableProvider` instances for actual planning/execution work.
   
   I think using this as a common interface for contrib projects (rather than say building execution contexts directly) would allow for maximum flexibility; for example, I might want to build a queryable context like:
   
   ```
   my_warehouse_project (catalog):
     raw (objstore provider):
     - events (objstore table)
     derived (in-mem schema provider):
     - daily_event_counts (memtable)
   ```


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