greenplumn CParseHandlerPhysicalWindow 源码

greenplumn CParseHandlerPhysicalWindow 代码

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

//---------------------------------------------------------------------------
//	Greenplum Database
//	Copyright (C) 2012 EMC Corp.
//
//	@filename:
//		CParseHandlerPhysicalWindow.cpp
//
//	@doc:
//		Implementation of the SAX parse handler class for parsing
//		a physical window operators
//---------------------------------------------------------------------------

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

#include "naucrates/dxl/operators/CDXLOperatorFactory.h"
#include "naucrates/dxl/operators/CDXLPhysicalWindow.h"
#include "naucrates/dxl/parser/CParseHandlerFactory.h"
#include "naucrates/dxl/parser/CParseHandlerFilter.h"
#include "naucrates/dxl/parser/CParseHandlerPhysicalOp.h"
#include "naucrates/dxl/parser/CParseHandlerProjList.h"
#include "naucrates/dxl/parser/CParseHandlerProperties.h"
#include "naucrates/dxl/parser/CParseHandlerUtils.h"
#include "naucrates/dxl/parser/CParseHandlerWindowKeyList.h"

using namespace gpdxl;

XERCES_CPP_NAMESPACE_USE

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

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

	const XMLCh *xml_str_part_by_cols = CDXLOperatorFactory::ExtractAttrValue(
		attrs, EdxltokenPartKeys, EdxltokenPhysicalWindow);
	m_part_by_colid_array = CDXLOperatorFactory::ExtractIntsToUlongArray(
		m_parse_handler_mgr->GetDXLMemoryManager(), xml_str_part_by_cols,
		EdxltokenPartKeys, EdxltokenPhysicalWindow);
	GPOS_ASSERT(nullptr != m_part_by_colid_array);

	// parse handler for window key list
	CParseHandlerBase *window_key_list_parse_handler =
		CParseHandlerFactory::GetParseHandler(
			m_mp, CDXLTokens::XmlstrToken(EdxltokenWindowKeyList),
			m_parse_handler_mgr, this);
	m_parse_handler_mgr->ActivateParseHandler(window_key_list_parse_handler);

	// parse handler for child node
	CParseHandlerBase *child_parse_handler =
		CParseHandlerFactory::GetParseHandler(
			m_mp, CDXLTokens::XmlstrToken(EdxltokenPhysical),
			m_parse_handler_mgr, this);
	m_parse_handler_mgr->ActivateParseHandler(child_parse_handler);

	// parse handler for the filter
	CParseHandlerBase *filter_parse_handler =
		CParseHandlerFactory::GetParseHandler(
			m_mp, CDXLTokens::XmlstrToken(EdxltokenScalarFilter),
			m_parse_handler_mgr, this);
	m_parse_handler_mgr->ActivateParseHandler(filter_parse_handler);

	// parse handler for the proj list
	CParseHandlerBase *proj_list_parse_handler =
		CParseHandlerFactory::GetParseHandler(
			m_mp, CDXLTokens::XmlstrToken(EdxltokenScalarProjList),
			m_parse_handler_mgr, this);
	m_parse_handler_mgr->ActivateParseHandler(proj_list_parse_handler);

	//parse handler for the properties of the operator
	CParseHandlerBase *prop_parse_handler =
		CParseHandlerFactory::GetParseHandler(
			m_mp, CDXLTokens::XmlstrToken(EdxltokenProperties),
			m_parse_handler_mgr, this);
	m_parse_handler_mgr->ActivateParseHandler(prop_parse_handler);

	// store child parse handlers in array
	this->Append(prop_parse_handler);
	this->Append(proj_list_parse_handler);
	this->Append(filter_parse_handler);
	this->Append(child_parse_handler);
	this->Append(window_key_list_parse_handler);
}

//---------------------------------------------------------------------------
//	@function:
//		CParseHandlerPhysicalWindow::EndElement
//
//	@doc:
//		Invoked by Xerces to process a closing tag
//
//---------------------------------------------------------------------------
void
CParseHandlerPhysicalWindow::EndElement(const XMLCh *const,	 // element_uri,
										const XMLCh *const element_local_name,
										const XMLCh *const	// element_qname
)
{
	if (0 != XMLString::compareString(
				 CDXLTokens::XmlstrToken(EdxltokenPhysicalWindow),
				 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(5 == this->Length());
	CParseHandlerProperties *prop_parse_handler =
		dynamic_cast<CParseHandlerProperties *>((*this)[0]);
	CParseHandlerProjList *proj_list_parse_handler =
		dynamic_cast<CParseHandlerProjList *>((*this)[1]);
	CParseHandlerFilter *filter_parse_handler =
		dynamic_cast<CParseHandlerFilter *>((*this)[2]);
	CParseHandlerPhysicalOp *child_parse_handler =
		dynamic_cast<CParseHandlerPhysicalOp *>((*this)[3]);

	CParseHandlerWindowKeyList *window_key_list_parse_handler =
		dynamic_cast<CParseHandlerWindowKeyList *>((*this)[4]);
	CDXLWindowKeyArray *window_key_array_dxlnode =
		window_key_list_parse_handler->GetDxlWindowKeyArray();
	CDXLPhysicalWindow *window_op_dxlnode = GPOS_NEW(m_mp) CDXLPhysicalWindow(
		m_mp, m_part_by_colid_array, window_key_array_dxlnode);
	m_dxl_node = GPOS_NEW(m_mp) CDXLNode(m_mp, window_op_dxlnode);

	// set statistics and physical properties
	CParseHandlerUtils::SetProperties(m_dxl_node, prop_parse_handler);

	// add children
	AddChildFromParseHandler(proj_list_parse_handler);
	AddChildFromParseHandler(filter_parse_handler);
	AddChildFromParseHandler(child_parse_handler);

	// 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