Fix: array list values are leaked on nested unnest operators (apach…

…e#10689)

* chore: fix issue + add test

* simplify test case

datafusion/physical-plan/src/unnest.rs

@@ -515,16 +515,10 @@ fn unnest_list_arrays(
         })
         .collect::<Result<Vec<_>>>()?;
 
-    // If there is only one list column to unnest and it doesn't contain any NULL lists,
-    // we can return the values array directly without any copying.
-    if typed_arrays.len() == 1 && typed_arrays[0].null_count() == 0 {
-        Ok(vec![typed_arrays[0].values().clone()])
-    } else {
-        typed_arrays
-            .iter()
-            .map(|list_array| unnest_list_array(*list_array, length_array, capacity))
-            .collect::<Result<_>>()
-    }
+    typed_arrays
+        .iter()
+        .map(|list_array| unnest_list_array(*list_array, length_array, capacity))
+        .collect::<Result<_>>()
 }
 
 /// Unnest a list array according the target length array.

datafusion/sqllogictest/test_files/unnest.slt

@@ -449,5 +449,14 @@ select sum(unnest(generate_series(1,10)));
 query error DataFusion error: Internal error: unnest on struct can ony be applied at the root level of select expression 
 select arrow_typeof(unnest(column5)) from unnest_table;
 
+
+## unnest from a result of a logical plan with limit and offset
+query I
+select unnest(column1) from (select * from (values([1,2,3]), ([4,5,6])) limit 1 offset 1);
+----
+4
+5
+6
+
 statement ok
 drop table unnest_table;