Clear indices temporary vecs earlier

Author: srh

datafusion/src/physical_plan/hash_aggregate.rs

@@ -500,6 +500,7 @@ pub(crate) fn group_aggregate_batch(
         all_group_indices.extend(std::iter::repeat(*group_index).take(indices.len()));
         offset_so_far += indices.len();
         offsets.push(offset_so_far);
+        indices.clear();
     }
     let batch_indices = batch_indices.finish();
 
@@ -574,11 +575,6 @@ pub(crate) fn group_aggregate_batch(
                         Ok(())
                     }
                 })
-                // 2.5
-                .and({
-                    indices.clear();
-                    Ok(())
-                })
         })?;
 
     for (accumulator_index, accumulator) in accumulation_state