wangbo commented on code in PR #11257:
URL: https://github.com/apache/doris/pull/11257#discussion_r932930559
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be/src/vec/aggregate_functions/aggregate_function_uniq.h:
##########
@@ -109,18 +102,96 @@ class AggregateFunctionUniq final
detail::OneAdder<T, Data>::add(this->data(place), *columns[0],
row_num);
}
+ static ALWAYS_INLINE const KeyType* get_keys(std::vector<KeyType>&
keys_container,
+ const IColumn& column, size_t
batch_size) {
+ if constexpr (std::is_same_v<T, String>) {
+ keys_container.resize(batch_size);
+ for (size_t i = 0; i != batch_size; ++i) {
+ StringRef value = column.get_data_at(i);
+ keys_container[i] = Data::get_key(value);
+ }
+ return keys_container.data();
+ } else {
+ using ColumnType =
+ std::conditional_t<IsDecimalNumber<T>, ColumnDecimal<T>,
ColumnVector<T>>;
+ return assert_cast<const ColumnType&>(column).get_data().data();
+ }
+ }
+
+ void add_batch(size_t batch_size, AggregateDataPtr* places, size_t
place_offset,
+ const IColumn** columns, Arena* arena) const override {
+ std::vector<KeyType> keys_container;
+ const KeyType* keys = get_keys(keys_container, *columns[0],
batch_size);
+
+ std::vector<typename Data::Set*> array_of_data_set(batch_size);
+
+ for (size_t i = 0; i != batch_size; ++i) {
+ array_of_data_set[i] = &(this->data(places[i] + place_offset).set);
+ }
+
+ for (size_t i = 0; i != batch_size; ++i) {
+ if (i + HASH_MAP_PREFETCH_DIST < batch_size) {
+ array_of_data_set[i + HASH_MAP_PREFETCH_DIST]->prefetch(
+ keys[i + HASH_MAP_PREFETCH_DIST]);
+ }
+
+ array_of_data_set[i]->insert(keys[i]);
+ }
+ }
+
void merge(AggregateDataPtr __restrict place, ConstAggregateDataPtr rhs,
Arena*) const override {
- this->data(place).set.merge(this->data(rhs).set);
+ auto& rhs_set = this->data(rhs).set;
+ if (rhs_set.size() == 0) return;
+
+ auto& set = this->data(place).set;
+ set.rehash(set.size() + rhs_set.size());
+
+ for (auto elem : rhs_set) {
+ set.insert(elem);
Review Comment:
phmap has merge method, is that same with insert one by one?
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