greenplumn CParseHandlerCTEConfig 源码

greenplumn CParseHandlerCTEConfig 代码

文件路径：/src/backend/gporca/libnaucrates/src/parser/CParseHandlerCTEConfig.cpp

//---------------------------------------------------------------------------
//	Greenplum Database
//	Copyright (C) 2013 EMC Corp.
//
//	@filename:
//		CParseHandlerCTEConfig.cpp
//
//	@doc:
//		Implementation of the SAX parse handler class for parsing CTE
//		configuration
//---------------------------------------------------------------------------

#include "naucrates/dxl/parser/CParseHandlerCTEConfig.h"

#include "gpopt/engine/CCTEConfig.h"
#include "naucrates/dxl/operators/CDXLOperatorFactory.h"
#include "naucrates/dxl/parser/CParseHandlerFactory.h"
#include "naucrates/dxl/parser/CParseHandlerManager.h"
#include "naucrates/dxl/xml/dxltokens.h"

using namespace gpdxl;
using namespace gpopt;

XERCES_CPP_NAMESPACE_USE

//---------------------------------------------------------------------------
//	@function:
//		CParseHandlerCTEConfig::CParseHandlerCTEConfig
//
//	@doc:
//		Ctor
//
//---------------------------------------------------------------------------
CParseHandlerCTEConfig::CParseHandlerCTEConfig(
	CMemoryPool *mp, CParseHandlerManager *parse_handler_mgr,
	CParseHandlerBase *parse_handler_root)
	: CParseHandlerBase(mp, parse_handler_mgr, parse_handler_root),
	  m_cte_conf(nullptr)
{
}

//---------------------------------------------------------------------------
//	@function:
//		CParseHandlerCTEConfig::~CParseHandlerCTEConfig
//
//	@doc:
//		Dtor
//
//---------------------------------------------------------------------------
CParseHandlerCTEConfig::~CParseHandlerCTEConfig()
{
	CRefCount::SafeRelease(m_cte_conf);
}

//---------------------------------------------------------------------------
//	@function:
//		CParseHandlerCTEConfig::StartElement
//
//	@doc:
//		Invoked by Xerces to process an opening tag
//
//---------------------------------------------------------------------------
void
CParseHandlerCTEConfig::StartElement(const XMLCh *const,  //element_uri,
									 const XMLCh *const element_local_name,
									 const XMLCh *const,  //element_qname,
									 const Attributes &attrs)
{
	if (0 !=
		XMLString::compareString(CDXLTokens::XmlstrToken(EdxltokenCTEConfig),
								 element_local_name))
	{
		CWStringDynamic *str = CDXLUtils::CreateDynamicStringFromXMLChArray(
			m_parse_handler_mgr->GetDXLMemoryManager(), element_local_name);
		GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiDXLUnexpectedTag,
				   str->GetBuffer());
	}

	// parse CTE configuration options
	ULONG cte_inlining_cut_off =
		CDXLOperatorFactory::ExtractConvertAttrValueToUlong(
			m_parse_handler_mgr->GetDXLMemoryManager(), attrs,
			EdxltokenCTEInliningCutoff, EdxltokenCTEConfig);

	m_cte_conf = GPOS_NEW(m_mp) CCTEConfig(cte_inlining_cut_off);
}

//---------------------------------------------------------------------------
//	@function:
//		CParseHandlerCTEConfig::EndElement
//
//	@doc:
//		Invoked by Xerces to process a closing tag
//
//---------------------------------------------------------------------------
void
CParseHandlerCTEConfig::EndElement(const XMLCh *const,	// element_uri,
								   const XMLCh *const element_local_name,
								   const XMLCh *const  // element_qname
)
{
	if (0 !=
		XMLString::compareString(CDXLTokens::XmlstrToken(EdxltokenCTEConfig),
								 element_local_name))
	{
		CWStringDynamic *str = CDXLUtils::CreateDynamicStringFromXMLChArray(
			m_parse_handler_mgr->GetDXLMemoryManager(), element_local_name);
		GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiDXLUnexpectedTag,
				   str->GetBuffer());
	}

	GPOS_ASSERT(nullptr != m_cte_conf);
	GPOS_ASSERT(0 == this->Length());

	// deactivate handler
	m_parse_handler_mgr->DeactivateHandler();
}

//---------------------------------------------------------------------------
//	@function:
//		CParseHandlerCTEConfig::GetParseHandlerType
//
//	@doc:
//		Return the type of the parse handler.
//
//---------------------------------------------------------------------------
EDxlParseHandlerType
CParseHandlerCTEConfig::GetParseHandlerType() const
{
	return EdxlphCTEConfig;
}

//---------------------------------------------------------------------------
//	@function:
//		CParseHandlerCTEConfig::GetCteConf
//
//	@doc:
//		Returns the CTE configuration
//
//---------------------------------------------------------------------------
CCTEConfig *
CParseHandlerCTEConfig::GetCteConf() const
{
	return m_cte_conf;
}

// EOF

相关信息

greenplumn 源码目录

相关文章

greenplumn CParseHandlerAgg 源码

greenplumn CParseHandlerAppend 源码

greenplumn CParseHandlerArray 源码

greenplumn CParseHandlerAssert 源码

greenplumn CParseHandlerBase 源码

greenplumn CParseHandlerBroadcastMotion 源码

greenplumn CParseHandlerCTEList 源码

greenplumn CParseHandlerColDescr 源码

greenplumn CParseHandlerColStats 源码

greenplumn CParseHandlerColStatsBucket 源码