[reland] Set streams when invoking UDFs #59210
Closed
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Stack from ghstack:
Reland of #58427
Running the UDF (be it Python or JIT) is the first step of (most?) RPC calls, which is where the inputs are consumed. The lazy stream context contains the streams used by the inputs, thus it must be made current before any UDF call. I opt to do this as "close" as possible to the place the UDF is invoked, to make the relationship as explicit as possible.
Differential Revision: D28623889