greenplumn CParseHandlerOp 源码
greenplumn CParseHandlerOp 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/parser/CParseHandlerOp.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2010 Greenplum, Inc.
//
// @filename:
// CParseHandlerOp.h
//
// @doc:
// Base SAX parse handler class for parsing DXL operators.
//---------------------------------------------------------------------------
#ifndef GPDXL_CParseHandlerOp_H
#define GPDXL_CParseHandlerOp_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLNode.h"
#include "naucrates/dxl/parser/CParseHandlerBase.h"
#include "naucrates/dxl/parser/CParseHandlerManager.h"
namespace gpdxl
{
using namespace gpos;
XERCES_CPP_NAMESPACE_USE
//---------------------------------------------------------------------------
// @class:
// CParseHandlerOp
//
// @doc:
// Base parse handler class for DXL operators
//
//
//---------------------------------------------------------------------------
class CParseHandlerOp : public CParseHandlerBase
{
private:
protected:
// the root of the parsed DXL tree constructed by the parse handler
CDXLNode *m_dxl_node;
void AddChildFromParseHandler(const CParseHandlerOp *);
public:
CParseHandlerOp(const CParseHandlerOp &) = delete;
// ctor/dtor
CParseHandlerOp(CMemoryPool *mp, CParseHandlerManager *parse_handler_mgr,
CParseHandlerBase *parse_handler_root);
~CParseHandlerOp() override;
// returns constructed DXL node
CDXLNode *CreateDXLNode() const;
};
} // namespace gpdxl
#endif // !GPDXL_CParseHandlerOp_H
// EOF
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