greenplumn CXformImplementTVF 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/xforms/CXformImplementTVF.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2012 EMC Corp.
/
/ @filename:
/ CXformImplementTVF.h
/
/ @doc:
/ Implement logical TVF with a physical TVF
/---------------------------------------------------------------------------
#ifndef GPOPT_CXformImplementTVF_H
#define GPOPT_CXformImplementTVF_H
#include "gpos/base.h"
#include "gpopt/xforms/CXformImplementation.h"
namespace gpopt
{
using namespace gpos;
/---------------------------------------------------------------------------
/ @class:
/ CXformImplementTVF
/
/ @doc:
/ Implement TVF
/
/---------------------------------------------------------------------------
class CXformImplementTVF : public CXformImplementation
{
private:
public:
CXformImplementTVF(const CXformImplementTVF &) = delete;
/ ctor
explicit CXformImplementTVF(CMemoryPool *mp);
/ ctor
explicit CXformImplementTVF(CExpression *pexprPattern);
/ dtor
~CXformImplementTVF() override = default;
/ ident accessors
EXformId
Exfid() const override
{
return ExfImplementTVF;
}
/ return a string for xform name
const CHAR *
SzId() const override
{
return "CXformImplementTVF";
}
/ 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 CXformImplementTVF
} / namespace gpopt
#endif / !GPOPT_CXformImplementTVF_H
/ EOF
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