greenplumn CScalarCoerceBase 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/operators/CScalarCoerceBase.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2017 VMware, Inc. or its affiliates.
/
/ @filename:
/ CScalarCoerceBase.h
/
/ @doc:
/ Scalar coerce operator base class
/
/ @owner:
/
/ @test:
/
/
/---------------------------------------------------------------------------
#ifndef GPOPT_CScalarCoerceBase_H
#define GPOPT_CScalarCoerceBase_H
#include "gpos/base.h"
#include "gpopt/operators/CScalar.h"
namespace gpopt
{
using namespace gpos;
/---------------------------------------------------------------------------
/ @class:
/ CScalarCoerceBase
/
/ @doc:
/ Scalar coerce operator base class
/
/---------------------------------------------------------------------------
class CScalarCoerceBase : public CScalar
{
private:
/ catalog MDId of the result type
IMDId *m_result_type_mdid;
/ output type modifier
INT m_type_modifier;
/ coercion form
ECoercionForm m_ecf;
/ location of token to be coerced
INT m_location;
public:
CScalarCoerceBase(const CScalarCoerceBase &) = delete;
/ ctor
CScalarCoerceBase(CMemoryPool *mp, IMDId *mdid_type, INT type_modifier,
ECoercionForm dxl_coerce_format, INT location);
/ dtor
~CScalarCoerceBase() override;
/ the type of the scalar expression
IMDId *MdidType() const override;
/ return type modifier
INT TypeModifier() const override;
/ return coercion form
ECoercionForm Ecf() const;
/ return token location
INT Location() const;
/ return a copy of the operator with remapped columns
COperator *PopCopyWithRemappedColumns(CMemoryPool *mp,
UlongToColRefMap *colref_mapping,
BOOL must_exist) override;
}; / class CScalarCoerceBase
} / namespace gpopt
#endif / !GPOPT_CScalarCoerceBase_H
/ EOF
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