greenplumn CParseHandlerNLJIndexParam 源码
greenplumn CParseHandlerNLJIndexParam 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/parser/CParseHandlerNLJIndexParam.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2018 VMware, Inc. or its affiliates.
//
// @filename:
// CParseHandlerNLJIndexParam.h
//
// @doc:
//
// SAX parse handler class for parsing a single NLJ index param
//---------------------------------------------------------------------------
#ifndef GPDXL_CParseHandlerNLJIndexParam_H
#define GPDXL_CParseHandlerNLJIndexParam_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLColRef.h"
#include "naucrates/dxl/parser/CParseHandlerScalarOp.h"
namespace gpdxl
{
using namespace gpos;
XERCES_CPP_NAMESPACE_USE
//---------------------------------------------------------------------------
// @class:
// CParseHandlerNLJIndexParam
//
// @doc:
// Parse handler for parsing a Param of NLJ
//
//---------------------------------------------------------------------------
class CParseHandlerNLJIndexParam : public CParseHandlerBase
{
private:
// column reference
CDXLColRef *m_nest_param_colref_dxl;
// 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:
CParseHandlerNLJIndexParam(const CParseHandlerNLJIndexParam &) = delete;
// ctor/dtor
CParseHandlerNLJIndexParam(CMemoryPool *mp,
CParseHandlerManager *parse_handler_manager,
CParseHandlerBase *parse_handler_root);
~CParseHandlerNLJIndexParam() override;
// return column reference
CDXLColRef *
GetNestParamColRefDxl(void) const
{
return m_nest_param_colref_dxl;
}
};
} // namespace gpdxl
#endif // GPDXL_CParseHandlerNLJIndexParam_H
//EOF
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