eliaperantoni commented on code in PR #13664:
URL: https://github.com/apache/datafusion/pull/13664#discussion_r1923538093


##########
datafusion/sql/src/expr/mod.rs:
##########
@@ -165,13 +177,126 @@ impl<S: ContextProvider> SqlToRel<'_, S> {
         schema: &DFSchema,
         planner_context: &mut PlannerContext,
     ) -> Result<Expr> {
-        let mut expr = self.sql_expr_to_logical_expr(sql, schema, 
planner_context)?;
+        // The location of the original SQL expression in the source code
+        let mut expr =
+            self.sql_expr_to_logical_expr(sql.clone(), schema, 
planner_context)?;

Review Comment:
   Also it's `validate_schema_satisfies_exprs` that throws the error, not 
`sql_expr_to_logical_expr`. And in that place I have access to the SQL 
expression, but the problem still is that I don't know which subexpression was 
the problem



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