adriangb opened a new pull request, #22234: URL: https://github.com/apache/datafusion/pull/22234
## Which issue does this PR close? - Part of #22144 (Adaptive filter pushdown), split into a reviewable stack. This is **PR 1 of 4**. ## Rationale for this change Adaptive filter scheduling needs a way to mark a `PhysicalExpr` as a *performance hint* — a filter that may be dropped without affecting query correctness (e.g. a hash-join dynamic filter, whose predicate the join already enforces). This PR adds that marker type. It is deliberately inert: nothing reads it yet. ## What changes are included in this PR? - `OptionalFilterPhysicalExpr`: a transparent `PhysicalExpr` wrapper that delegates every trait method to its inner expression. - Proto support: a new `PhysicalOptionalFilterNode` message so physical plans containing the wrapper round-trip through `datafusion-proto`. No caller wraps anything yet — the hash-join wrap and the parquet scheduler that consume the marker arrive later in the stack. ## Are these changes tested? Yes — unit tests for the wrapper's delegation behavior and a proto round-trip test. ## Are there any user-facing changes? New public type `OptionalFilterPhysicalExpr`. Purely additive; no behavior change. --- Stacked PRs (review/merge in order): 1. **this PR** — OptionalFilterPhysicalExpr + proto 2. Per-conjunct pruning statistics 3. SelectivityTracker cost model 4. Adaptive parquet scan integration -- 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] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
