greenplumn CUnionAllStatsProcessor 源码
greenplumn CUnionAllStatsProcessor 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/statistics/CUnionAllStatsProcessor.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2018 VMware, Inc. or its affiliates.
//
// @filename:
// CUnionAllStatsProcessor.h
//
// @doc:
// Compute statistics for union all operation
//---------------------------------------------------------------------------
#ifndef GPNAUCRATES_CUnionAllStatsProcessor_H
#define GPNAUCRATES_CUnionAllStatsProcessor_H
#include "gpopt/optimizer/COptimizerConfig.h"
#include "naucrates/statistics/CStatistics.h"
namespace gpnaucrates
{
class CUnionAllStatsProcessor
{
public:
static CStatistics *CreateStatsForUnionAll(
CMemoryPool *mp, const CStatistics *stats_first_child,
const CStatistics *stats_second_child, ULongPtrArray *output_colids,
ULongPtrArray *first_child_colids, ULongPtrArray *second_child_colids);
};
} // namespace gpnaucrates
#endif // !GPNAUCRATES_CUnionAllStatsProcessor_H
// EOF
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