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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