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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