rluvaton commented on code in PR #27302:
URL: https://github.com/apache/datafusion/pull/27302#discussion_r4526733111
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datafusion/physical-expr/src/expressions/binary.rs:
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@@ -44,13 +45,36 @@ use kernels::{
};
/// Binary expression
-#[derive(Debug, Clone, Eq)]
+#[derive(Clone, Eq)]
pub struct BinaryExpr {
left: Arc<dyn PhysicalExpr>,
op: Operator,
right: Arc<dyn PhysicalExpr>,
/// Specifies whether an error is returned on overflow or not
fail_on_overflow: bool,
+ /// Lazily computed on first use, so walking the children is not repeated
+ /// for every batch. Children never change after construction, and every
+ /// constructor starts with an empty cache, so it never goes stale.
+ children_volatility: OnceLock<ChildrenVolatility>,
Review Comment:
changed to `Option` and only evaluate for AND and OR
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