alamb commented on code in PR #17092:
URL: https://github.com/apache/datafusion/pull/17092#discussion_r2265210412


##########
datafusion/optimizer/src/simplify_expressions/expr_simplifier.rs:
##########
@@ -103,6 +103,7 @@ pub struct ExprSimplifier<S> {
     /// Should expressions be canonicalized before simplification? Defaults to
     /// true
     canonicalize: bool,
+    evaluate_constants: bool,

Review Comment:
   Can you please also document what this field means and that its default is 
true and that it is used for testing?



##########
datafusion/sqllogictest/test_files/predicates.slt:
##########
@@ -811,5 +811,26 @@ explain select x from t where x NOT IN (1,2,3,4,5) AND x 
IN (1,2,3);
 logical_plan EmptyRelation
 physical_plan EmptyExec
 
+query error DataFusion error: This feature is not implemented: Physical plan 
does not support logical expression InSubquery\(InSubquery \{ expr: 
Literal\(Int64\(NULL\), None\), subquery: <subquery>, negated: false \}\)

Review Comment:
   I confirmed these tests pass even without the code in this PR, as you 
mention in the description



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