be/src/exec/aggregation-node-ir.cc

// Licensed to the Apache Software Foundation (ASF) under one
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// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
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// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

#include "exec/aggregation-node.h"

#include "exec/old-hash-table.inline.h"
#include "runtime/row-batch.h"
#include "runtime/runtime-state.h"
#include "runtime/tuple.h"
#include "runtime/tuple-row.h"

using namespace impala;

// Functions in this file are cross compiled to IR with clang.  These functions
// are modified at runtime with a query specific codegen'd UpdateAggTuple

FunctionContext* AggregationNode::GetAggFnCtx(int i) const {
  return agg_fn_ctxs_[i];
}

ExprContext* AggregationNode::GetAggExprCtx(int i) const {
  return agg_expr_ctxs_[i];
}

void AggregationNode::ProcessRowBatchNoGrouping(RowBatch* batch) {
  for (int i = 0; i < batch->num_rows(); ++i) {
    UpdateTuple(singleton_intermediate_tuple_, batch->GetRow(i));
  }
}

void AggregationNode::ProcessRowBatchWithGrouping(RowBatch* batch) {
  for (int i = 0; i < batch->num_rows(); ++i) {
    TupleRow* row = batch->GetRow(i);
    Tuple* agg_tuple = NULL;
    OldHashTable::Iterator it = hash_tbl_->Find(row);
    if (it.AtEnd()) {
      agg_tuple = ConstructIntermediateTuple();
      hash_tbl_->Insert(agg_tuple);
    } else {
      agg_tuple = it.GetTuple();
    }
    UpdateTuple(agg_tuple, row);
  }
}