HappenLee commented on code in PR #22327:
URL: https://github.com/apache/doris/pull/22327#discussion_r1278888604


##########
be/src/vec/common/aggregation_common.h:
##########
@@ -218,6 +196,70 @@ T pack_fixed(size_t i, size_t keys_size, const 
ColumnRawPtrs& key_columns, const
     return key;
 }
 
+template <typename T>
+std::vector<T> pack_fixeds(size_t row_numbers, const ColumnRawPtrs& 
key_columns,
+                           const Sizes& key_sizes, const ColumnRawPtrs& 
nullmap_columns) {
+    size_t bitmap_size = 0;
+    if (!nullmap_columns.empty()) {
+        bitmap_size = std::tuple_size<KeysNullMap<T>>::value;
+    }
+
+    std::vector<T> result(row_numbers);
+    size_t offset = 0;
+    if (bitmap_size > 0) {
+        for (size_t j = 0; j < nullmap_columns.size(); j++) {
+            if (!nullmap_columns[j]) {
+                continue;
+            }
+            size_t bucket = j / 8;
+            size_t offset = j % 8;
+            const auto& data =
+                    assert_cast<const 
ColumnUInt8&>(*nullmap_columns[j]).get_data().data();
+            for (size_t i = 0; i < row_numbers; ++i) {
+                *((char*)(&result[i]) + bucket) |= data[i] << offset;
+            }
+        }
+        offset += bitmap_size;
+    }
+
+    for (size_t j = 0; j < key_columns.size(); ++j) {
+        const char* data = key_columns[j]->get_raw_data().data;
+
+        auto foo = [&]<typename Fixed>(Fixed zero) {
+            if (nullmap_columns.size() && nullmap_columns[j]) {
+                const auto& nullmap =
+                        assert_cast<const 
ColumnUInt8&>(*nullmap_columns[j]).get_data().data();
+                for (size_t i = 0; i < row_numbers; ++i) {
+                    // make sure null cell is filled by 0x0
+                    memcpy_fixed<Fixed>((char*)(&result[i]) + offset,
+                                        nullmap[i] ? (char*)&zero : data + i * 
key_sizes[j]);

Review Comment:
   `key_sizes[j]` replace by `sizeof(Fixed)`



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