greenplumn CParseHandlerWindowSpecList 代码
文件路径：/src/backend/gporca/libnaucrates/src/parser/CParseHandlerWindowSpecList.cpp
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2012 EMC Corp.
/
/ @filename:
/ CParseHandlerWindowSpecList.cpp
/
/ @doc:
/ Implementation of the SAX parse handler class for parsing the list of
/ window specifications in the logical window operator
/---------------------------------------------------------------------------
#include "naucrates/dxl/parser/CParseHandlerWindowSpecList.h"
#include "naucrates/dxl/operators/CDXLOperatorFactory.h"
#include "naucrates/dxl/parser/CParseHandlerFactory.h"
#include "naucrates/dxl/parser/CParseHandlerManager.h"
#include "naucrates/dxl/parser/CParseHandlerWindowSpec.h"
using namespace gpdxl;
XERCES_CPP_NAMESPACE_USE
/---------------------------------------------------------------------------
/ @function:
/ CParseHandlerWindowSpecList::CParseHandlerWindowSpecList
/
/ @doc:
/ Ctor
/
/---------------------------------------------------------------------------
CParseHandlerWindowSpecList::CParseHandlerWindowSpecList(
CMemoryPool *mp, CParseHandlerManager *parse_handler_mgr,
CParseHandlerBase *parse_handler_root)
: CParseHandlerBase(mp, parse_handler_mgr, parse_handler_root),
m_window_spec_array(nullptr)
{
}
/---------------------------------------------------------------------------
/ @function:
/ CParseHandlerWindowSpecList::StartElement
/
/ @doc:
/ Invoked by Xerces to process an opening tag
/
/---------------------------------------------------------------------------
void
CParseHandlerWindowSpecList::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(EdxltokenWindowSpecList),
element_local_name))
{
m_window_spec_array = GPOS_NEW(m_mp) CDXLWindowSpecArray(m_mp);
}
else if (0 == XMLString::compareString(
CDXLTokens::XmlstrToken(EdxltokenWindowSpec),
element_local_name))
{
/ we must have seen a window specification list already
GPOS_ASSERT(nullptr != m_window_spec_array);
/ start new window specification element
CParseHandlerBase *window_spec_parse_handler =
CParseHandlerFactory::GetParseHandler(
m_mp, CDXLTokens::XmlstrToken(EdxltokenWindowSpec),
m_parse_handler_mgr, this);
m_parse_handler_mgr->ActivateParseHandler(window_spec_parse_handler);
/ store parse handler
this->Append(window_spec_parse_handler);
window_spec_parse_handler->startElement(element_uri, element_local_name,
element_qname, attrs);
}
else
{
CWStringDynamic *str = CDXLUtils::CreateDynamicStringFromXMLChArray(
m_parse_handler_mgr->GetDXLMemoryManager(), element_local_name);
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiDXLUnexpectedTag,
str->GetBuffer());
}
}
/---------------------------------------------------------------------------
/ @function:
/ CParseHandlerWindowSpecList::EndElement
/
/ @doc:
/ Invoked by Xerces to process a closing tag
/
/---------------------------------------------------------------------------
void
CParseHandlerWindowSpecList::EndElement(const XMLCh *const, / element_uri,
const XMLCh *const element_local_name,
const XMLCh *const / element_qname
)
{
if (0 != XMLString::compareString(
CDXLTokens::XmlstrToken(EdxltokenWindowSpecList),
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_window_spec_array);
const ULONG size = this->Length();
/ add the window specifications to the list
for (ULONG idx = 0; idx < size; idx++)
{
CParseHandlerWindowSpec *window_spec_parse_handler =
dynamic_cast<CParseHandlerWindowSpec *>((*this)[idx]);
m_window_spec_array->Append(
window_spec_parse_handler->GetWindowKeyAt());
}
/ deactivate handler
m_parse_handler_mgr->DeactivateHandler();
}
/ EOF
相关信息
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