greenplumn CParseHandlerPlan 源码
greenplumn CParseHandlerPlan 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/parser/CParseHandlerPlan.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2010 Greenplum, Inc.
//
// @filename:
// CParseHandlerPlan.h
//
// @doc:
// SAX parse handler class for converting physical plans from a DXL document
// into a DXL tree.
//---------------------------------------------------------------------------
#ifndef GPDXL_CParseHandlerPlan_H
#define GPDXL_CParseHandlerPlan_H
#include "gpos/base.h"
#include "naucrates/dxl/parser/CParseHandlerBase.h"
namespace gpdxl
{
using namespace gpos;
XERCES_CPP_NAMESPACE_USE
// fwd decl
class CDXLDirectDispatchInfo;
//---------------------------------------------------------------------------
// @class:
// CParseHandlerPlan
//
// @doc:
// Parse handler for converting physical plans from a DXL document
// into a DXL tree.
//---------------------------------------------------------------------------
class CParseHandlerPlan : public CParseHandlerBase
{
private:
// plan id
ULLONG m_plan_id;
// size of plan space
ULLONG m_plan_space_size;
// the root of the parsed DXL tree constructed by the parse handler
CDXLNode *m_dxl_node;
// process the end of an element
void StartElement(
const XMLCh *const element_uri, // URI of element's namespace
const XMLCh *const element_local_name, // local part of element's name
const XMLCh *const element_qname, // element's qname
const Attributes &attr // element's attributes
) override;
// process the end of an element
void EndElement(
const XMLCh *const element_uri, // URI of element's namespace
const XMLCh *const element_local_name, // local part of element's name
const XMLCh *const element_qname // element's qname
) override;
public:
// private ctor
CParseHandlerPlan(const CParseHandlerPlan &) = delete;
// ctor/dtor
CParseHandlerPlan(CMemoryPool *mp, CParseHandlerManager *parse_handler_mgr,
CParseHandlerBase *parse_handler_root);
~CParseHandlerPlan() override;
// returns the root of constructed DXL plan
CDXLNode *CreateDXLNode();
// return plan id
ULLONG
PlanId() const
{
return m_plan_id;
}
// return size of plan space
ULLONG
PlanSpaceSize() const
{
return m_plan_space_size;
}
EDxlParseHandlerType GetParseHandlerType() const override;
};
} // namespace gpdxl
#endif // !GPDXL_CParseHandlerPlan_H
// EOF
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