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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