refactor: consolidate datafusion session setup #3860
Merged
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Description
We are still creating sessions in several places in the codebase. With this PR, we create a single code path (or at least module) to create datafusion sessions. We also further generalise some APIs to use the
Sessiontrait.The main code paths where we still use
SessionStatewhenever we need to use theDataFrameabstraction. These might disappear once we start planning more based on data.Closing the related issue for now, since further improvements are part of larger refactorings.
Related Issue(s)