greenplumn CXformIndexGet2IndexScan 源码
greenplumn CXformIndexGet2IndexScan 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/xforms/CXformIndexGet2IndexScan.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2012 EMC Corp.
//
// @filename:
// CXformIndexGet2IndexScan.h
//
// @doc:
// Transform Index Get to Index Scan
//---------------------------------------------------------------------------
#ifndef GPOPT_CXformIndexGet2IndexScan_H
#define GPOPT_CXformIndexGet2IndexScan_H
#include "gpos/base.h"
#include "gpopt/xforms/CXformImplementation.h"
namespace gpopt
{
using namespace gpos;
//---------------------------------------------------------------------------
// @class:
// CXformIndexGet2IndexScan
//
// @doc:
// Transform Index Get to Index Scan
//
//---------------------------------------------------------------------------
class CXformIndexGet2IndexScan : public CXformImplementation
{
private:
public:
CXformIndexGet2IndexScan(const CXformIndexGet2IndexScan &) = delete;
// ctor
explicit CXformIndexGet2IndexScan(CMemoryPool *);
// dtor
~CXformIndexGet2IndexScan() override = default;
// ident accessors
EXformId
Exfid() const override
{
return ExfIndexGet2IndexScan;
}
// xform name
const CHAR *
SzId() const override
{
return "CXformIndexGet2IndexScan";
}
// 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 CXformIndexGet2IndexScan
} // namespace gpopt
#endif // !GPOPT_CXformIndexGet2IndexScan_H
// EOF
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