greenplumn CParseHandlerGroupingColList 代码
文件路径：/src/backend/gporca/libnaucrates/src/parser/CParseHandlerGroupingColList.cpp
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2010 Greenplum, Inc.
/
/ @filename:
/ CParseHandlerGroupingColList.cpp
/
/ @doc:
/ Implementation of the SAX parse handler class for parsing grouping column
/ id lists.
/---------------------------------------------------------------------------
#include "naucrates/dxl/parser/CParseHandlerGroupingColList.h"
#include "naucrates/dxl/operators/CDXLNode.h"
#include "naucrates/dxl/operators/CDXLOperatorFactory.h"
#include "naucrates/dxl/parser/CParseHandlerManager.h"
#include "naucrates/dxl/xml/dxltokens.h"
using namespace gpdxl;
XERCES_CPP_NAMESPACE_USE
/---------------------------------------------------------------------------
/ @function:
/ CParseHandlerGroupingColList::CParseHandlerGroupingColList
/
/ @doc:
/ Constructor
/
/---------------------------------------------------------------------------
CParseHandlerGroupingColList::CParseHandlerGroupingColList(
CMemoryPool *mp, CParseHandlerManager *parse_handler_mgr,
CParseHandlerBase *parse_handler_root)
: CParseHandlerBase(mp, parse_handler_mgr, parse_handler_root),
m_grouping_colids_array(nullptr)
{
}
/---------------------------------------------------------------------------
/ @function:
/ CParseHandlerGroupingColList::~CParseHandlerGroupingColList
/
/ @doc:
/ Destructor
/
/---------------------------------------------------------------------------
CParseHandlerGroupingColList::~CParseHandlerGroupingColList()
{
CRefCount::SafeRelease(m_grouping_colids_array);
}
/---------------------------------------------------------------------------
/ @function:
/ CParseHandlerGroupingColList::StartElement
/
/ @doc:
/ Invoked by Xerces to process an opening tag
/
/---------------------------------------------------------------------------
void
CParseHandlerGroupingColList::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(EdxltokenScalarGroupingColList),
element_local_name))
{
/ start the grouping column list
m_grouping_colids_array = GPOS_NEW(m_mp) ULongPtrArray(m_mp);
}
else if (0 == XMLString::compareString(
CDXLTokens::XmlstrToken(EdxltokenGroupingCol),
element_local_name))
{
/ we must have seen a grouping cols list already and initialized the grouping cols array
GPOS_ASSERT(nullptr != m_grouping_colids_array);
/ parse grouping col id
ULONG *pulColId =
GPOS_NEW(m_mp) ULONG(CDXLOperatorFactory::ParseGroupingColId(
m_parse_handler_mgr->GetDXLMemoryManager(), attrs));
m_grouping_colids_array->Append(pulColId);
}
else
{
CWStringDynamic *str = CDXLUtils::CreateDynamicStringFromXMLChArray(
m_parse_handler_mgr->GetDXLMemoryManager(), element_local_name);
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiDXLUnexpectedTag,
str->GetBuffer());
}
}
/---------------------------------------------------------------------------
/ @function:
/ CParseHandlerGroupingColList::EndElement
/
/ @doc:
/ Invoked by Xerces to process a closing tag
/
/---------------------------------------------------------------------------
void
CParseHandlerGroupingColList::EndElement(const XMLCh *const, / element_uri,
const XMLCh *const element_local_name,
const XMLCh *const / element_qname
)
{
if (0 == XMLString::compareString(
CDXLTokens::XmlstrToken(EdxltokenScalarGroupingColList),
element_local_name))
{
/ deactivate handler
m_parse_handler_mgr->DeactivateHandler();
}
else if (0 != XMLString::compareString(
CDXLTokens::XmlstrToken(EdxltokenGroupingCol),
element_local_name))
{
CWStringDynamic *str = CDXLUtils::CreateDynamicStringFromXMLChArray(
m_parse_handler_mgr->GetDXLMemoryManager(), element_local_name);
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiDXLUnexpectedTag,
str->GetBuffer());
}
}
/---------------------------------------------------------------------------
/ @function:
/ CParseHandlerGroupingColList::GetGroupingColidArray
/
/ @doc:
/ Returns the array of parsed grouping column ids
/
/---------------------------------------------------------------------------
ULongPtrArray *
CParseHandlerGroupingColList::GetGroupingColidArray()
{
return m_grouping_colids_array;
}
/ 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