greenplumn IMDScCmp 源码
greenplumn IMDScCmp 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/md/IMDScCmp.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2013 EMC Corp.
//
// @filename:
// IMDScCmp.h
//
// @doc:
// Interface for scalar comparison operators in the MD cache
//---------------------------------------------------------------------------
#ifndef GPMD_IMDScCmp_H
#define GPMD_IMDScCmp_H
#include "gpos/base.h"
#include "naucrates/md/IMDCacheObject.h"
#include "naucrates/md/IMDType.h"
namespace gpmd
{
using namespace gpos;
//---------------------------------------------------------------------------
// @class:
// IMDScCmp
//
// @doc:
// Interface for scalar comparison operators in the MD cache
//
//---------------------------------------------------------------------------
class IMDScCmp : public IMDCacheObject
{
public:
// object type
Emdtype
MDType() const override
{
return EmdtScCmp;
}
// left type
virtual IMDId *GetLeftMdid() const = 0;
// right type
virtual IMDId *GetRightMdid() const = 0;
// comparison type
virtual IMDType::ECmpType ParseCmpType() const = 0;
// comparison operator id
virtual IMDId *MdIdOp() const = 0;
};
} // namespace gpmd
#endif // !GPMD_IMDScCmp_H
// EOF
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