LLDay commented on code in PR #20009:
URL: https://github.com/apache/datafusion/pull/20009#discussion_r2757535813
##########
datafusion/physical-plan/src/joins/hash_join/exec.rs:
##########
@@ -1384,6 +1386,55 @@ impl ExecutionPlan for HashJoinExec {
}
Ok(result)
}
+
+ fn physical_expressions<'a>(
+ &'a self,
+ ) -> Option<Box<dyn Iterator<Item = Arc<dyn PhysicalExpr>> + 'a>> {
+ self.filter
+ .as_ref()
+ .map(|f| Box::new(std::iter::once(Arc::clone(&f.expression))) as
Box<_>)
+ }
+
+ fn with_physical_expressions(
+ &self,
+ mut params: ReplacePhysicalExpr,
+ ) -> Result<Option<Arc<dyn ExecutionPlan>>> {
+ let expected_count = self.filter.iter().len();
+ let exprs_count = params.exprs.len();
+ assert_eq_or_internal_err!(
+ expected_count,
+ exprs_count,
+ "Inconsistent number of physical expressions for {}",
+ self.name()
+ );
+
+ let filter = self
+ .filter
+ .as_ref()
+ .zip(params.exprs.pop())
+ .map(|(f, expr)| {
+ JoinFilter::new(expr, f.column_indices.clone(),
Arc::clone(&f.schema))
+ });
+
+ Ok(Some(Arc::new(Self {
+ left: Arc::clone(&self.left),
+ right: Arc::clone(&self.right),
+ on: self.on.clone(),
+ filter,
+ join_type: self.join_type,
+ join_schema: Arc::clone(&self.join_schema),
+ left_fut: Arc::clone(&self.left_fut),
Review Comment:
> So let's switch the semantic.
If we choose the reset semantic, we should also reset the dynamic filters.
But this means that if we want to resolve the placeholders once before
executing, the dynamic filter will be lost and the query will run slower.
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