impl vectorized_append.

Author: Rachelint

datafusion/physical-plan/src/aggregates/group_values/column.rs

@@ -319,16 +319,23 @@ impl GroupValuesColumn {
                 next_group_index = self.group_index_lists[current_group_index];
             }
         }
-
-        self.vectorized_equal_to_results
-            .resize(self.vectorized_equal_to_group_indices.len(), true);
     }
 
     /// Perform `vectorized_equal_to`
     ///
-    ///
     fn vectorized_equal_to(&mut self, cols: &[ArrayRef]) {
+        debug_assert_eq!(
+            self.vectorized_equal_to_group_indices.len(),
+            self.vectorized_equal_to_row_indices.len()
+        );
+
+        if self.vectorized_equal_to_group_indices.is_empty() {
+            return;
+        }
+
+        // Vectorized equal to `cols` and `group columns`
         let mut equal_to_results = mem::take(&mut self.vectorized_equal_to_results);
+        equal_to_results.resize(self.vectorized_equal_to_group_indices.len(), true);
         for (col_idx, group_col) in self.group_values.iter().enumerate() {
             group_col.vectorized_equal_to(
                 &self.vectorized_equal_to_group_indices,
@@ -337,8 +344,40 @@ impl GroupValuesColumn {
                 &mut equal_to_results,
             );
         }
+
+        let mut current_row_equal_to_result = false;
+        let mut current_row = *self.vectorized_equal_to_row_indices.first().unwrap();
+        for (idx, &row) in self.vectorized_equal_to_row_indices.iter().enumerate() {
+            // If found next row, according to the equal to result of `current_row`
+            if current_row != row {
+                if !current_row_equal_to_result {
+                    self.vectorized_append_row_indices.push(row);
+                }
+                current_row = row;
+                current_row_equal_to_result = equal_to_results[idx];
+                continue;
+            }
+            current_row_equal_to_result |= equal_to_results[idx];
+        }
+
+        if !current_row_equal_to_result {
+            self.vectorized_append_row_indices.push(current_row);
+        }
+
         self.vectorized_equal_to_results = equal_to_results;
     }
+
+    /// Perform `vectorized_append`
+    ///
+    /// 1. Vectorized append new values into `group_values`
+    /// 2. Update `map` and `group_index_lists`
+    fn vectorized_append(&mut self, cols: &[ArrayRef], batch_hashes: &[u64]) {
+        if self.vectorized_append_row_indices.is_empty() {
+            return;
+        }
+
+        // 1. Vectorized append new values into `group_values`
+    }
 }
 
 /// instantiates a [`PrimitiveGroupValueBuilder`] and pushes it into $v