greenplumn CXformDynamicGet2DynamicTableScan 源码
greenplumn CXformDynamicGet2DynamicTableScan 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/xforms/CXformDynamicGet2DynamicTableScan.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2012 EMC Corp.
//
// @filename:
// CXformDynamicGet2DynamicTableScan.h
//
// @doc:
// Transform DynamicGet to DynamicTableScan
//---------------------------------------------------------------------------
#ifndef GPOPT_CXformDynamicGet2DynamicTableScan_H
#define GPOPT_CXformDynamicGet2DynamicTableScan_H
#include "gpos/base.h"
#include "gpopt/xforms/CXformImplementation.h"
namespace gpopt
{
using namespace gpos;
//---------------------------------------------------------------------------
// @class:
// CXformDynamicGet2DynamicTableScan
//
// @doc:
// Transform DynamicGet to DynamicTableScan
//
//---------------------------------------------------------------------------
class CXformDynamicGet2DynamicTableScan : public CXformImplementation
{
private:
public:
CXformDynamicGet2DynamicTableScan(
const CXformDynamicGet2DynamicTableScan &) = delete;
// ctor
explicit CXformDynamicGet2DynamicTableScan(CMemoryPool *mp);
// dtor
~CXformDynamicGet2DynamicTableScan() override = default;
// ident accessors
EXformId
Exfid() const override
{
return ExfDynamicGet2DynamicTableScan;
}
// return a string for xform name
const CHAR *
SzId() const override
{
return "CXformDynamicGet2DynamicTableScan";
}
// compute xform promise for a given expression handle
EXformPromise
Exfp(CExpressionHandle & // exprhdl
) const override
{
return CXform::ExfpHigh;
}
// actual transform
void Transform(CXformContext *pxfctxt, CXformResult *pxfres,
CExpression *pexpr) const override;
}; // class CXformDynamicGet2DynamicTableScan
} // namespace gpopt
#endif // !GPOPT_CXformDynamicGet2DynamicTableScan_H
// EOF
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