zhangstar333 commented on code in PR #55010:
URL: https://github.com/apache/doris/pull/55010#discussion_r2296976456
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be/src/vec/aggregate_functions/aggregate_function_bitmap.h:
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@@ -400,9 +401,20 @@ class AggregateFunctionBitmapCount final
void add_batch_single_place(size_t batch_size, AggregateDataPtr place,
const IColumn** columns,
Arena& arena) const override {
+ auto normal_add_lambda = [&]() {
+ for (size_t i = 0; i < batch_size; ++i) {
+ this->add(place, columns, i, arena);
+ }
+ };
+
// now this only for bitmap_union_count function
if constexpr (std::is_same_v<ColVecType, ColumnBitmap>) {
- auto lambda_function = [&](const IColumn& data_column, const
NullMap* null_map) {
+ // if batch_size is small, the add_batch of fast union seems to be
slower than normal add
+ if (batch_size < BATCH_HALF_ROWS) {
+ normal_add_lambda();
+ return;
+ }
+ auto add_batch_lambda = [&](const IColumn& data_column, const
NullMap* null_map) {
Review Comment:
can't do it, the add_batch_lambda it's used for BITMAP,
and the input maybe not bitmap column for AggregateFunctionBitmapCount class
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