greenplumn CParseHandlerSortCol 源码
greenplumn CParseHandlerSortCol 代码
文件路径:/src/backend/gporca/libnaucrates/src/parser/CParseHandlerSortCol.cpp
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2010 Greenplum, Inc.
//
// @filename:
// CParseHandlerSortCol.cpp
//
// @doc:
// Implementation of the SAX parse handler class for parsing sorting columns.
//---------------------------------------------------------------------------
#include "naucrates/dxl/parser/CParseHandlerSortCol.h"
#include "naucrates/dxl/operators/CDXLOperatorFactory.h"
#include "naucrates/dxl/operators/CDXLScalarSortCol.h"
#include "naucrates/dxl/parser/CParseHandlerScalarOp.h"
using namespace gpdxl;
XERCES_CPP_NAMESPACE_USE
//---------------------------------------------------------------------------
// @function:
// CParseHandlerSortCol::CParseHandlerSortCol
//
// @doc:
// Constructor
//
//---------------------------------------------------------------------------
CParseHandlerSortCol::CParseHandlerSortCol(
CMemoryPool *mp, CParseHandlerManager *parse_handler_mgr,
CParseHandlerBase *parse_handler_root)
: CParseHandlerScalarOp(mp, parse_handler_mgr, parse_handler_root)
{
}
//---------------------------------------------------------------------------
// @function:
// CParseHandlerSortCol::StartElement
//
// @doc:
// Invoked by Xerces to process an opening tag
//
//---------------------------------------------------------------------------
void
CParseHandlerSortCol::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(EdxltokenScalarSortCol),
element_local_name))
{
CWStringDynamic *str = CDXLUtils::CreateDynamicStringFromXMLChArray(
m_parse_handler_mgr->GetDXLMemoryManager(), element_local_name);
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiDXLUnexpectedTag,
str->GetBuffer());
}
// parse and create sort col operator
CDXLScalarSortCol *dxl_op =
(CDXLScalarSortCol *) CDXLOperatorFactory::MakeDXLSortCol(
m_parse_handler_mgr->GetDXLMemoryManager(), attrs);
m_dxl_node = GPOS_NEW(m_mp) CDXLNode(m_mp, dxl_op);
}
//---------------------------------------------------------------------------
// @function:
// CParseHandlerSortCol::EndElement
//
// @doc:
// Invoked by Xerces to process a closing tag
//
//---------------------------------------------------------------------------
void
CParseHandlerSortCol::EndElement(const XMLCh *const, // element_uri,
const XMLCh *const element_local_name,
const XMLCh *const // element_qname
)
{
if (0 != XMLString::compareString(
CDXLTokens::XmlstrToken(EdxltokenScalarSortCol),
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_dxl_node);
#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
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
0
赞
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
6、 golang
-
7、 openharmony