greenplumn CDXLScalarOneTimeFilter 源码
greenplumn CDXLScalarOneTimeFilter 代码
文件路径：/src/backend/gporca/libnaucrates/src/operators/CDXLScalarOneTimeFilter.cpp
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2010 Greenplum, Inc.
//
// @filename:
// CDXLScalarOneTimeFilter.cpp
//
// @doc:
// Implementation of DXL physical one-time filter operator
//---------------------------------------------------------------------------
#include "naucrates/dxl/operators/CDXLScalarOneTimeFilter.h"
#include "naucrates/dxl/operators/CDXLNode.h"
#include "naucrates/dxl/xml/CXMLSerializer.h"
using namespace gpos;
using namespace gpdxl;
//---------------------------------------------------------------------------
// @function:
// CDXLScalarOneTimeFilter::CDXLScalarOneTimeFilter
//
// @doc:
// Constructor
//
//---------------------------------------------------------------------------
CDXLScalarOneTimeFilter::CDXLScalarOneTimeFilter(CMemoryPool *mp)
: CDXLScalarFilter(mp)
{
}
//---------------------------------------------------------------------------
// @function:
// CDXLScalarOneTimeFilter::GetDXLOperator
//
// @doc:
// Operator type
//
//---------------------------------------------------------------------------
Edxlopid
CDXLScalarOneTimeFilter::GetDXLOperator() const
{
return EdxlopScalarOneTimeFilter;
}
//---------------------------------------------------------------------------
// @function:
// CDXLScalarOneTimeFilter::GetOpNameStr
//
// @doc:
// Operator name
//
//---------------------------------------------------------------------------
const CWStringConst *
CDXLScalarOneTimeFilter::GetOpNameStr() const
{
return CDXLTokens::GetDXLTokenStr(EdxltokenScalarOneTimeFilter);
}
//---------------------------------------------------------------------------
// @function:
// CDXLScalarOneTimeFilter::SerializeToDXL
//
// @doc:
// Serialize operator in DXL format
//
//---------------------------------------------------------------------------
void
CDXLScalarOneTimeFilter::SerializeToDXL(CXMLSerializer *xml_serializer,
const CDXLNode *dxlnode) const
{
const CWStringConst *element_name = GetOpNameStr();
xml_serializer->OpenElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix), element_name);
// serilize children
dxlnode->SerializeChildrenToDXL(xml_serializer);
xml_serializer->CloseElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix), element_name);
}
// EOF
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