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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