greenplumn CScalarCoerceBase 源码
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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