greenplumn CDXLScalarBitmapIndexProbe 源码
greenplumn CDXLScalarBitmapIndexProbe 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLScalarBitmapIndexProbe.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2014 VMware, Inc. or its affiliates.
//
// @filename:
// CDXLScalarBitmapIndexProbe.h
//
// @doc:
// Class for representing DXL bitmap index probe operators
//---------------------------------------------------------------------------
#ifndef GPDXL_CDXLScalarBitmapIndexProbe_H
#define GPDXL_CDXLScalarBitmapIndexProbe_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLScalar.h"
namespace gpdxl
{
using namespace gpos;
// fwd declarations
class CDXLIndexDescr;
class CXMLSerializer;
//---------------------------------------------------------------------------
// @class:
// CDXLScalarBitmapIndexProbe
//
// @doc:
// Class for representing DXL bitmap index probe operators
//
//---------------------------------------------------------------------------
class CDXLScalarBitmapIndexProbe : public CDXLScalar
{
private:
// index descriptor associated with the scanned table
CDXLIndexDescr *m_dxl_index_descr;
public:
CDXLScalarBitmapIndexProbe(CDXLScalarBitmapIndexProbe &) = delete;
// ctor
CDXLScalarBitmapIndexProbe(CMemoryPool *mp,
CDXLIndexDescr *dxl_index_descr);
//dtor
~CDXLScalarBitmapIndexProbe() override;
// operator type
Edxlopid
GetDXLOperator() const override
{
return EdxlopScalarBitmapIndexProbe;
}
// operator name
const CWStringConst *GetOpNameStr() const override;
// index descriptor
virtual const CDXLIndexDescr *
GetDXLIndexDescr() const
{
return m_dxl_index_descr;
}
// serialize operator in DXL format
void SerializeToDXL(CXMLSerializer *xml_serializer,
const CDXLNode *dxlnode) const override;
// does the operator return a boolean result
BOOL
HasBoolResult(CMDAccessor * //md_accessor
) const override
{
return false;
}
#ifdef GPOS_DEBUG
// checks whether the operator has valid structure, i.e. number and
// types of child nodes
void AssertValid(const CDXLNode *dxlnode,
BOOL validate_children) const override;
#endif // GPOS_DEBUG
// conversion function
static CDXLScalarBitmapIndexProbe *
Cast(CDXLOperator *dxl_op)
{
GPOS_ASSERT(nullptr != dxl_op);
GPOS_ASSERT(EdxlopScalarBitmapIndexProbe == dxl_op->GetDXLOperator());
return dynamic_cast<CDXLScalarBitmapIndexProbe *>(dxl_op);
}
}; // class CDXLScalarBitmapIndexProbe
} // namespace gpdxl
#endif // !GPDXL_CDXLScalarBitmapIndexProbe_H
// EOF
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