rluvaton commented on code in PR #18183:
URL: https://github.com/apache/datafusion/pull/18183#discussion_r2524452919
##########
datafusion/physical-expr/src/expressions/case.rs:
##########
@@ -69,8 +71,27 @@ enum EvalMethod {
///
/// CASE WHEN condition THEN expression ELSE expression END
ExpressionOrExpression,
+
+ /// This is a specialization for [`EvalMethod::WithExpression`] when the
value and results are literals
+ ///
+ /// See [`LiteralLookupTable`] for more details
+ WithExprScalarLookupTable(LiteralLookupTable),
+}
+
+// Implement empty hash as the data is derived from PhysicalExprs which are
already hashed
+impl Hash for LiteralLookupTable {
Review Comment:
added
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