greenplumn CDistributionSpecStrictRandom 源码
greenplumn CDistributionSpecStrictRandom 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/base/CDistributionSpecStrictRandom.h
// Greenplum Database
// Copyright (C) 2016 VMware, Inc. or its affiliates.
#ifndef GPOPT_CDistributionSpecStrictRandom_H
#define GPOPT_CDistributionSpecStrictRandom_H
#include "gpos/base.h"
#include "gpopt/base/CDistributionSpecRandom.h"
namespace gpopt
{
using namespace gpos;
//---------------------------------------------------------------------------
// @class:
// CDistributionSpecStrictRandom
//
// @doc:
// Class for representing forced random distribution.
//
//---------------------------------------------------------------------------
class CDistributionSpecStrictRandom : public CDistributionSpecRandom
{
public:
//ctor
CDistributionSpecStrictRandom();
// accessor
EDistributionType
Edt() const override
{
return CDistributionSpec::EdtStrictRandom;
}
const CHAR *
SzId() const override
{
return "STRICT RANDOM";
}
// does this distribution match the given one
BOOL Matches(const CDistributionSpec *pds) const override;
// does this distribution satisfy the given one
BOOL FSatisfies(const CDistributionSpec *pds) const override;
}; // class CDistributionSpecStrictRandom
} // namespace gpopt
#endif // !GPOPT_CDistributionSpecStrictRandom_H
// EOF
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