greenplumn CParseHandlerHint 源码
greenplumn CParseHandlerHint 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/parser/CParseHandlerHint.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2016 VMware, Inc. or its affiliates.
//
// @filename:
// CParseHandlerHint.h
//
// @doc:
// SAX parse handler class for parsing hint configuration
//---------------------------------------------------------------------------
#ifndef GPDXL_CParseHandlerHint_H
#define GPDXL_CParseHandlerHint_H
#include "gpos/base.h"
#include "gpopt/engine/CHint.h"
#include "naucrates/dxl/parser/CParseHandlerBase.h"
namespace gpdxl
{
using namespace gpos;
XERCES_CPP_NAMESPACE_USE
//---------------------------------------------------------------------------
// @class:
// CParseHandlerHint
//
// @doc:
// SAX parse handler class for parsing hint configuration options
//
//---------------------------------------------------------------------------
class CParseHandlerHint : public CParseHandlerBase
{
private:
// hint configuration
CHint *m_hint;
// process the start 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:
CParseHandlerHint(const CParseHandlerHint &) = delete;
// ctor
CParseHandlerHint(CMemoryPool *mp, CParseHandlerManager *parse_handler_mgr,
CParseHandlerBase *parse_handler_root);
// dtor
~CParseHandlerHint() override;
// type of the parse handler
EDxlParseHandlerType GetParseHandlerType() const override;
// hint configuration
CHint *GetHint() const;
};
} // namespace gpdxl
#endif // !GPDXL_CParseHandlerHint_H
// EOF
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