fix null date args in range (#14093)

* fix null dates in range

* fix

---------

Co-authored-by: Cyprien Huet <chuet@palantir.com>

Author: cht42

datafusion/functions-nested/src/range.rs

@@ -448,17 +448,29 @@ fn gen_range_date(args: &[ArrayRef], include_upper_bound: bool) -> Result<ArrayR
     let values_builder = Date32Builder::new();
     let mut list_builder = ListBuilder::new(values_builder);
 
-    for (idx, stop) in stop_array.iter().enumerate() {
-        let mut stop = stop.unwrap_or(0);
+    for idx in 0..stop_array.len() {
+        if stop_array.is_null(idx) {
+            list_builder.append_null();
+            continue;
+        }
+        let mut stop = stop_array.value(idx);
 
         let start = if let Some(start_array_values) = start_array {
+            if start_array_values.is_null(idx) {
+                list_builder.append_null();
+                continue;
+            }
             start_array_values.value(idx)
         } else {
             list_builder.append_null();
             continue;
         };
 
         let step = if let Some(step) = step_array {
+            if step.is_null(idx) {
+                list_builder.append_null();
+                continue;
+            }
             step.value(idx)
         } else {
             list_builder.append_null();

datafusion/sqllogictest/test_files/array.slt

@@ -6091,6 +6091,21 @@ select range(NULL, DATE '1993-03-01', INTERVAL '1' YEAR);
 ----
 NULL
 
+query ?
+select generate_series(NULL::Date, DATE '1993-03-01', INTERVAL '1' YEAR);
+----
+NULL
+
+query ?
+select generate_series(DATE '1993-03-01', NULL::Date, INTERVAL '1' YEAR);
+----
+NULL
+
+query ?
+select generate_series(DATE '1993-02-01', DATE '1993-03-01', NULL::Interval);
+----
+NULL
+
 query ?
 select range(NULL, TIMESTAMP '1993-03-01', INTERVAL '1' YEAR);
 ----
@@ -6201,6 +6216,21 @@ select generate_series(NULL, DATE '1993-03-01', INTERVAL '1' YEAR);
 ----
 NULL
 
+query ?
+select generate_series(NULL::Date, DATE '1993-03-01', INTERVAL '1' YEAR);
+----
+NULL
+
+query ?
+select generate_series(DATE '1993-03-01', NULL::Date, INTERVAL '1' YEAR);
+----
+NULL
+
+query ?
+select generate_series(DATE '1993-02-01', DATE '1993-03-01', NULL::Interval);
+----
+NULL
+
 query ?
 select generate_series(NULL, TIMESTAMP '1993-03-01', INTERVAL '1' YEAR);
 ----