greenplumn CParseHandlerLogicalDelete 源码

greenplumn CParseHandlerLogicalDelete 代码

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

//---------------------------------------------------------------------------
//	Greenplum Database
//	Copyright (C) 2012 EMC Corp.
//
//	@filename:
//		CParseHandlerLogicalDelete.cpp
//
//	@doc:
//		Implementation of the SAX parse handler class for parsing logical
//		delete operator
//---------------------------------------------------------------------------

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

#include "naucrates/dxl/operators/CDXLLogicalDelete.h"
#include "naucrates/dxl/operators/CDXLOperatorFactory.h"
#include "naucrates/dxl/parser/CParseHandlerFactory.h"
#include "naucrates/dxl/parser/CParseHandlerTableDescr.h"

using namespace gpdxl;


XERCES_CPP_NAMESPACE_USE

//---------------------------------------------------------------------------
//	@function:
//		CParseHandlerLogicalDelete::CParseHandlerLogicalDelete
//
//	@doc:
//		Ctor
//
//---------------------------------------------------------------------------
CParseHandlerLogicalDelete::CParseHandlerLogicalDelete(
	CMemoryPool *mp, CParseHandlerManager *parse_handler_mgr,
	CParseHandlerBase *parse_handler_root)
	: CParseHandlerLogicalOp(mp, parse_handler_mgr, parse_handler_root)
{
}

//---------------------------------------------------------------------------
//	@function:
//		CParseHandlerLogicalDelete::StartElement
//
//	@doc:
//		Invoked by Xerces to process an opening tag
//
//---------------------------------------------------------------------------
void
CParseHandlerLogicalDelete::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(EdxltokenLogicalDelete),
				 element_local_name))
	{
		CWStringDynamic *str = CDXLUtils::CreateDynamicStringFromXMLChArray(
			m_parse_handler_mgr->GetDXLMemoryManager(), element_local_name);
		GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiDXLUnexpectedTag,
				   str->GetBuffer());
	}

	m_ctid_colid = CDXLOperatorFactory::ExtractConvertAttrValueToUlong(
		m_parse_handler_mgr->GetDXLMemoryManager(), attrs, EdxltokenCtidColId,
		EdxltokenLogicalDelete);
	m_segid_colid = CDXLOperatorFactory::ExtractConvertAttrValueToUlong(
		m_parse_handler_mgr->GetDXLMemoryManager(), attrs,
		EdxltokenGpSegmentIdColId, EdxltokenLogicalDelete);

	const XMLCh *deletion_colids = CDXLOperatorFactory::ExtractAttrValue(
		attrs, EdxltokenDeleteCols, EdxltokenLogicalDelete);
	m_deletion_colid_array = CDXLOperatorFactory::ExtractIntsToUlongArray(
		m_parse_handler_mgr->GetDXLMemoryManager(), deletion_colids,
		EdxltokenDeleteCols, EdxltokenLogicalDelete);

	// parse handler for logical operator
	CParseHandlerBase *child_parse_handler =
		CParseHandlerFactory::GetParseHandler(
			m_mp, CDXLTokens::XmlstrToken(EdxltokenLogical),
			m_parse_handler_mgr, this);
	m_parse_handler_mgr->ActivateParseHandler(child_parse_handler);

	//parse handler for the table descriptor
	CParseHandlerBase *table_descr_parse_handler =
		CParseHandlerFactory::GetParseHandler(
			m_mp, CDXLTokens::XmlstrToken(EdxltokenTableDescr),
			m_parse_handler_mgr, this);
	m_parse_handler_mgr->ActivateParseHandler(table_descr_parse_handler);

	// store child parse handler in array
	this->Append(table_descr_parse_handler);
	this->Append(child_parse_handler);
}

//---------------------------------------------------------------------------
//	@function:
//		CParseHandlerLogicalDelete::EndElement
//
//	@doc:
//		Invoked by Xerces to process a closing tag
//
//---------------------------------------------------------------------------
void
CParseHandlerLogicalDelete::EndElement(const XMLCh *const,	// element_uri,
									   const XMLCh *const element_local_name,
									   const XMLCh *const  // element_qname
)
{
	if (0 != XMLString::compareString(
				 CDXLTokens::XmlstrToken(EdxltokenLogicalDelete),
				 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(2 == this->Length());

	CParseHandlerTableDescr *table_descr_parse_handler =
		dynamic_cast<CParseHandlerTableDescr *>((*this)[0]);
	CParseHandlerLogicalOp *logical_op_parse_handler =
		dynamic_cast<CParseHandlerLogicalOp *>((*this)[1]);

	GPOS_ASSERT(nullptr != table_descr_parse_handler->GetDXLTableDescr());
	GPOS_ASSERT(nullptr != logical_op_parse_handler->CreateDXLNode());

	CDXLTableDescr *table_descr = table_descr_parse_handler->GetDXLTableDescr();
	table_descr->AddRef();

	m_dxl_node = GPOS_NEW(m_mp)
		CDXLNode(m_mp, GPOS_NEW(m_mp) CDXLLogicalDelete(
						   m_mp, table_descr, m_ctid_colid, m_segid_colid,
						   m_deletion_colid_array));

	AddChildFromParseHandler(logical_op_parse_handler);

#ifdef GPOS_DEBUG
	m_dxl_node->GetOperator()->AssertValid(m_dxl_node,
										   false /* validate_children */);
#endif	// GPOS_DEBUG

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

greenplumn CParseHandlerCTEList 源码

greenplumn CParseHandlerColDescr 源码

greenplumn CParseHandlerColStats 源码