greenplumn CXformIndexGet2IndexOnlyScan 源码
greenplumn CXformIndexGet2IndexOnlyScan 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/xforms/CXformIndexGet2IndexOnlyScan.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2020 VMware, Inc.
//
// @filename:
// CXformIndexGet2IndexOnlyScan.h
//
// @doc:
// Transform Index Get to Index Only Scan
//---------------------------------------------------------------------------
#ifndef GPOPT_CXformIndexGet2IndexOnlyScan_H
#define GPOPT_CXformIndexGet2IndexOnlyScan_H
#include "gpos/base.h"
#include "gpopt/xforms/CXformImplementation.h"
namespace gpopt
{
using namespace gpos;
//---------------------------------------------------------------------------
// @class:
// CXformIndexGet2IndexOnlyScan
//
// @doc:
// Transform Index Get to Index Scan
//
//---------------------------------------------------------------------------
class CXformIndexGet2IndexOnlyScan : public CXformImplementation
{
private:
public:
CXformIndexGet2IndexOnlyScan(const CXformIndexGet2IndexOnlyScan &) = delete;
// ctor
explicit CXformIndexGet2IndexOnlyScan(CMemoryPool *);
// dtor
~CXformIndexGet2IndexOnlyScan() override = default;
// ident accessors
EXformId
Exfid() const override
{
return ExfIndexGet2IndexOnlyScan;
}
// xform name
const CHAR *
SzId() const override
{
return "CXformIndexGet2IndexOnlyScan";
}
// compute xform promise for a given expression handle
EXformPromise Exfp(CExpressionHandle & //exprhdl
) const override;
// actual transform
void Transform(CXformContext *pxfctxt, CXformResult *pxfres,
CExpression *pexpr) const override;
}; // class CXformIndexGet2IndexOnlyScan
} // namespace gpopt
#endif // !GPOPT_CXformIndexGet2IndexOnlyScan_H
// EOF
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