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[Experiment] Do predicate pushdown before projection pushdown #26604

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[Experiment] Do predicate pushdown before projection pushdown #26604

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17 changes: 8 additions & 9 deletions crates/polars-plan/src/plans/optimizer/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -73,7 +73,14 @@ pub(super) fn run_projection_predicate_pushdown(
pushdown_maintain_errors: bool,
opt_flags: &OptFlags,
) -> PolarsResult<()> {
// Should be run before predicate pushdown.
if opt_flags.predicate_pushdown() {
let mut predicate_pushdown_opt =
PredicatePushDown::new(pushdown_maintain_errors, opt_flags.new_streaming());
let ir = ir_arena.take(root);
let ir = predicate_pushdown_opt.optimize(ir, ir_arena, expr_arena)?;
ir_arena.replace(root, ir);
}

if opt_flags.projection_pushdown() {
let mut projection_pushdown_opt = ProjectionPushDown::new();
let ir = ir_arena.take(root);
Expand All @@ -86,14 +93,6 @@ pub(super) fn run_projection_predicate_pushdown(
}
}

if opt_flags.predicate_pushdown() {
let mut predicate_pushdown_opt =
PredicatePushDown::new(pushdown_maintain_errors, opt_flags.new_streaming());
let ir = ir_arena.take(root);
let ir = predicate_pushdown_opt.optimize(ir, ir_arena, expr_arena)?;
ir_arena.replace(root, ir);
}

Ok(())
}

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