Make PruningPredicate's rewrite public #12835
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adriangb
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Oct 9, 2024
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| /// Notice: Does not handle [`phys_expr::InListExpr`] greater than 20, which will fall back to calling `unhandled_hook` | ||
| pub fn build_predicate_expression( |
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I'm open to new names. We could also make a wrapper that e.g. does not require required_columns and takes Option<UnhandledPredicateHook> which defaults to true.
adriangb
commented
Oct 9, 2024
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| pub trait UnhandledPredicateHook { | ||
| /// Called when a predicate can not be handled by DataFusion's transformation rules | ||
| /// or is referencing a column that is not in the schema. | ||
| fn handle(&self, expr: &Arc<dyn PhysicalExpr>) -> Arc<dyn PhysicalExpr>; | ||
| } | ||
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| #[derive(Debug, Clone)] | ||
| struct ConstantUnhandledPredicateHook { | ||
| default: Arc<dyn PhysicalExpr>, | ||
| } | ||
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| impl ConstantUnhandledPredicateHook { | ||
| fn new(default: Arc<dyn PhysicalExpr>) -> Self { | ||
| Self { default } | ||
| } | ||
| } | ||
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| impl UnhandledPredicateHook for ConstantUnhandledPredicateHook { | ||
| fn handle(&self, _expr: &Arc<dyn PhysicalExpr>) -> Arc<dyn PhysicalExpr> { | ||
| self.default.clone() | ||
| } | ||
| } |
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No strong feelings for naming these, I don't love the current names.
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Sorry for the churn, closing in favor of #12850 |
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Replaces #12606
As per #12606 (comment) the plan was to split the rewrite logic from the rest of PruningPredicate. It turns out that was as easy as making a function public, kudos to whoever wrote this originally for organizing it nicely 🥳.