greenplumn CXformGet2TableScan 源码
greenplumn CXformGet2TableScan 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/xforms/CXformGet2TableScan.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2009 Greenplum, Inc.
//
// @filename:
// CXformGet2TableScan.h
//
// @doc:
// Transform Get to TableScan
//---------------------------------------------------------------------------
#ifndef GPOPT_CXformGet2TableScan_H
#define GPOPT_CXformGet2TableScan_H
#include "gpos/base.h"
#include "gpopt/xforms/CXformImplementation.h"
namespace gpopt
{
using namespace gpos;
//---------------------------------------------------------------------------
// @class:
// CXformGet2TableScan
//
// @doc:
// Transform Get to TableScan
//
//---------------------------------------------------------------------------
class CXformGet2TableScan : public CXformImplementation
{
private:
public:
CXformGet2TableScan(const CXformGet2TableScan &) = delete;
// ctor
explicit CXformGet2TableScan(CMemoryPool *);
// dtor
~CXformGet2TableScan() override = default;
// ident accessors
EXformId
Exfid() const override
{
return ExfGet2TableScan;
}
// return a string for xform name
const CHAR *
SzId() const override
{
return "CXformGet2TableScan";
}
// 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 CXformGet2TableScan
} // namespace gpopt
#endif // !GPOPT_CXformGet2TableScan_H
// EOF
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