fix: update comment on FilterPushdownPropagation#20040
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adriangb merged 2 commits intoapache:mainfrom Feb 6, 2026
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masonh22
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Jan 28, 2026
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Looks good, I just have one small comment
| #[derive(Debug, Clone)] | ||
| pub struct FilterPushdownPropagation<T> { | ||
| /// What filters were pushed into the parent node. | ||
| /// Which parent filters were pushed down into this node's children. |
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I'm not super familiar with the physical optimizer filter pushdown rule, but push_down_filters() in physical-optimizer/src/filter_pushdown.rs specifically distinguishes between "parent" filters and "self" filters, which are both contained in FilterPushdownPropagation::filters.
So I think the comment should be "Which filters were pushed down..." instead of "Which parent filters were pushed down..."
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In this case this is from a node to it's parent. As far as that node is concerned all fitlers came from the parent (it doesn't care if it's grandparent's filters or parent's filters)
adriangb
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Feb 6, 2026
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Which issue does this PR close?
No
Rationale for this change
I think the original comment is misleading as we actually want to express if a parent filter was pushed down to any child successfully.
What changes are included in this PR?
Updated the comment about the
filtersin theFilterPushdownPropagationstruct.Are these changes tested?
No need to test as it only modifies comments.
Are there any user-facing changes?
Yes, but only touches the comment.