greenplumn CDXLScalarCoerceViaIO 源码
greenplumn CDXLScalarCoerceViaIO 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLScalarCoerceViaIO.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2014 VMware, Inc. or its affiliates.
//
// @filename:
// CDXLScalarCoerceViaIO.h
//
// @doc:
// Class for representing DXL CoerceViaIO operation,
// the operator captures coercing a value from one type to another, by
// calling the output function of the argument type, and passing the
// result to the input function of the result type.
//
// @owner:
//
// @test:
//
//---------------------------------------------------------------------------
#ifndef GPDXL_CDXLScalarCoerceViaIO_H
#define GPDXL_CDXLScalarCoerceViaIO_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLScalarCoerceBase.h"
#include "naucrates/md/IMDId.h"
namespace gpdxl
{
using namespace gpos;
using namespace gpmd;
//---------------------------------------------------------------------------
// @class:
// CDXLScalarCoerceViaIO
//
// @doc:
// Class for representing DXL casting operator
//
//---------------------------------------------------------------------------
class CDXLScalarCoerceViaIO : public CDXLScalarCoerceBase
{
private:
public:
CDXLScalarCoerceViaIO(const CDXLScalarCoerceViaIO &) = delete;
// ctor/dtor
CDXLScalarCoerceViaIO(CMemoryPool *mp, IMDId *mdid_type, INT type_modifier,
EdxlCoercionForm dxl_coerce_format, INT location);
~CDXLScalarCoerceViaIO() override = default;
// ident accessor
Edxlopid
GetDXLOperator() const override
{
return EdxlopScalarCoerceViaIO;
}
// name of the DXL operator name
const CWStringConst *GetOpNameStr() const override;
// conversion function
static CDXLScalarCoerceViaIO *
Cast(CDXLOperator *dxl_op)
{
GPOS_ASSERT(nullptr != dxl_op);
GPOS_ASSERT(EdxlopScalarCoerceViaIO == dxl_op->GetDXLOperator());
return dynamic_cast<CDXLScalarCoerceViaIO *>(dxl_op);
}
};
} // namespace gpdxl
#endif // !GPDXL_CDXLScalarCoerceViaIO_H
// EOF
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