Adding Info in FinalizingSimpleTransform

src/Interpreters/InterpreterSelectQuery.cpp

@@ -1749,7 +1749,6 @@ void InterpreterSelectQuery::executeAggregation(QueryPipeline & pipeline, const
     /// Forget about current totals and extremes. They will be calculated again after aggregation if needed.
     pipeline.dropTotalsAndExtremes();
 
-    /// TODO better case determination
     if (group_by_info && settings.optimize_aggregation_in_order)
     {
         auto & query = getSelectQuery();
@@ -1771,7 +1770,6 @@ void InterpreterSelectQuery::executeAggregation(QueryPipeline & pipeline, const
                     return std::make_shared<AggregatingInOrderTransform>(header, transform_params, group_by_descr, settings.max_block_size, many_data, counter++);
                 });
 
-                /// TODO remove code duplication
                 for (auto & column_description : group_by_descr)
                 {
                     if (!column_description.column_name.empty())
@@ -1797,13 +1795,10 @@ void InterpreterSelectQuery::executeAggregation(QueryPipeline & pipeline, const
                 });
             }
 
-            if (final)
-            {
             pipeline.addSimpleTransform([&](const Block & header)
             {
                 return std::make_shared<FinalizingSimpleTransform>(header, transform_params);
             });
-            }
 
             pipeline.enableQuotaForCurrentStreams();
             return;

src/Processors/Transforms/AggregatingInOrderTransform.cpp

@@ -16,7 +16,7 @@ AggregatingInOrderTransform::AggregatingInOrderTransform(
     Block header, AggregatingTransformParamsPtr params_,
     const SortDescription & group_by_description_, size_t res_block_size_,
     ManyAggregatedDataPtr many_data_, size_t current_variant)
-    : IProcessor({std::move(header)}, {params_->getHeader(false)})
+    : IProcessor({std::move(header)}, {params_->getCustomHeader(false)})
     , res_block_size(res_block_size_)
     , params(std::move(params_))
     , group_by_description(group_by_description_)
@@ -24,7 +24,8 @@ AggregatingInOrderTransform::AggregatingInOrderTransform(
     , many_data(std::move(many_data_))
     , variants(*many_data->variants[current_variant])
 {
-    res_header = params->getHeader(false);
+    /// We won't finalize states in order to merge same states (generated due to multi-thread execution) in AggregatingSortedTransform
+    res_header = params->getCustomHeader(false);
 
     /// Replace column names to column position in description_sorted.
     for (auto & column_description : group_by_description)
@@ -56,7 +57,6 @@ static bool less(const MutableColumns & lhs, const Columns & rhs, size_t i, size
 
 void AggregatingInOrderTransform::consume(Chunk chunk)
 {
-    /// Find the position of last already read key in current chunk.
     size_t rows = chunk.getNumRows();
     if (rows == 0)
         return;
@@ -75,7 +75,7 @@ void AggregatingInOrderTransform::consume(Chunk chunk)
 
     size_t key_end = 0;
     size_t key_begin = 0;
-
+    /// If we don't have a block we create it and fill with first key
     if (!cur_block_size)
     {
         res_key_columns.resize(params->params.keys_size);
@@ -85,7 +85,6 @@ void AggregatingInOrderTransform::consume(Chunk chunk)
         {
             res_key_columns[i] = res_header.safeGetByPosition(i).type->createColumn();
         }
-
         for (size_t i = 0; i < params->params.aggregates_size; ++i)
         {
             res_aggregate_columns[i] = res_header.safeGetByPosition(i + params->params.keys_size).type->createColumn();
@@ -96,11 +95,11 @@ void AggregatingInOrderTransform::consume(Chunk chunk)
     size_t mid = 0;
     size_t high = 0;
     size_t low = -1;
-
+    /// Will split block into segments with the same key
     while (key_end != rows)
     {
         high = rows;
-        /// Find the first position of new key in current chunk
+        /// Find the first position of new (not current) key in current chunk
         while (high - low > 1)
         {
             mid = (low + high) / 2;
@@ -110,20 +109,18 @@ void AggregatingInOrderTransform::consume(Chunk chunk)
                 high = mid;
         }
         key_end = high;
-
+        /// Add data to aggr. state if interval is not empty. Empty when haven't found current key in new block.
         if (key_begin != key_end)
         {
-            /// Add data to the state if segment is not empty (Empty when we were looking for last key in new block and haven't found it)
             params->aggregator.executeOnIntervalWithoutKeyImpl(variants.without_key, key_begin, key_end, aggregate_function_instructions.data(), variants.aggregates_pool);
         }
 
         low = key_begin = key_end;
-
+        /// We finalize last key aggregation state if a new key found.
         if (key_begin != rows)
         {
-            /// We finalize last key aggregation states if a new key found (Not found if high == rows)
             params->aggregator.fillAggregateColumnsWithSingleKey(variants, res_aggregate_columns);
-
+            /// If res_block_size is reached we have to stop consuming and generate the block. Save the extra rows into new chunk.
             if (cur_block_size == res_block_size)
             {
                 Columns source_columns = chunk.detachColumns();
@@ -159,7 +156,7 @@ void AggregatingInOrderTransform::work()
     }
 }
 
-/// TODO simplify prepare
+
 IProcessor::Status AggregatingInOrderTransform::prepare()
 {
     auto & output = outputs.front();
@@ -196,6 +193,7 @@ IProcessor::Status AggregatingInOrderTransform::prepare()
         {
             output.push(std::move(to_push_chunk));
             output.finish();
+            LOG_TRACE(log, "Aggregated");
             return Status::Finished;
         }
         if (input.isFinished())

src/Processors/Transforms/AggregatingInOrderTransform.h

@@ -63,15 +63,25 @@ private:
 class FinalizingSimpleTransform : public ISimpleTransform
 {
 public:
-    FinalizingSimpleTransform(Block header, AggregatingTransformParamsPtr params)
-        : ISimpleTransform({std::move(header)}, {params->getHeader(true)}, true) {}
+    FinalizingSimpleTransform(Block header, AggregatingTransformParamsPtr params_)
+        : ISimpleTransform({std::move(header)}, {params_->getHeader()}, true)
+        , params(params_) {}
 
     void transform(Chunk & chunk) override
     {
+        if (!chunk.getChunkInfo())
+        {
+            auto info = std::make_shared<AggregatedChunkInfo>();
+            chunk.setChunkInfo(std::move(info));
+        }
+        if (params->final)
             finalizeChunk(chunk);
     }
 
     String getName() const override { return "FinalizingSimpleTransform"; }
+
+private:
+    AggregatingTransformParamsPtr params;
 };
 
 

src/Processors/Transforms/AggregatingTransform.h

@@ -29,8 +29,7 @@ struct AggregatingTransformParams
 
     Block getHeader() const { return aggregator.getHeader(final); }
 
-    /// TODO remove that logic
-    Block getHeader(bool final_) const { return aggregator.getHeader(final_); }
+    Block getCustomHeader(bool final_) const { return aggregator.getHeader(final_); }
 };
 
 struct ManyAggregatedData