PR comments

datafusion/core/src/physical_plan/file_format/parquet.rs

@@ -1278,11 +1278,6 @@ mod tests {
                 .await
                 .unwrap();
 
-        // This does not look correct since the "c2" values in the result do not in fact match the predicate `c2 == 0`
-        // but parquet pruning is not exact. If the min/max values are not defined (which they are not in this case since the it is
-        // a null array, then the pruning predicate (currently) can not be applied.
-        // In a real query where this predicate was pushed down from a filter stage instead of created directly in the `ParquetExec`,
-        // the filter stage would be preserved as a separate execution plan stage so the actual query results would be as expected.
         let expected = vec![
             "+----+----+",
             "| c1 | c2 |",

datafusion/expr/src/expr_fn.rs

@@ -456,10 +456,8 @@ pub fn combine_filters_disjunctive(filters: &[Expr]) -> Option<Expr> {
     if filters.is_empty() {
         return None;
     }
-    let combined_filter = filters
-        .iter()
-        .reduce(|acc, filter| or(acc, filter.clone()));
-    Some(combined_filter)
+
+    filters.iter().cloned().reduce(or)
 }
 
 /// Recursively un-alias an expressions