greenplumn CLimitStatsProcessor 源码
greenplumn CLimitStatsProcessor 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/statistics/CLimitStatsProcessor.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2018 VMware, Inc. or its affiliates.
//
// @filename:
// CLimitStatsProcessor.h
//
// @doc:
// Compute statistics for limit operation
//---------------------------------------------------------------------------
#ifndef GPNAUCRATES_CLimitStatsProcessor_H
#define GPNAUCRATES_CLimitStatsProcessor_H
#include "gpopt/optimizer/COptimizerConfig.h"
#include "naucrates/statistics/CStatisticsUtils.h"
namespace gpnaucrates
{
using namespace gpos;
class CLimitStatsProcessor
{
public:
// limit
static CStatistics *CalcLimitStats(CMemoryPool *mp,
const CStatistics *input_stats,
CDouble input_limit_rows);
};
} // namespace gpnaucrates
#endif // !GPNAUCRATES_CLimitStatsProcessor_H
// EOF
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