greenplumn CDXLPhysicalResult 代码
文件路径：/src/backend/gporca/libnaucrates/src/operators/CDXLPhysicalResult.cpp
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2011 Greenplum, Inc.
/
/ @filename:
/ CDXLPhysicalResult.cpp
/
/ @doc:
/ Implementation of DXL physical result operator
/---------------------------------------------------------------------------
#include "naucrates/dxl/operators/CDXLPhysicalResult.h"
#include "naucrates/dxl/operators/CDXLNode.h"
#include "naucrates/dxl/xml/CXMLSerializer.h"
using namespace gpos;
using namespace gpdxl;
/---------------------------------------------------------------------------
/ @function:
/ CDXLPhysicalResult::CDXLPhysicalResult
/
/ @doc:
/ Constructor
/
/---------------------------------------------------------------------------
CDXLPhysicalResult::CDXLPhysicalResult(CMemoryPool *mp) : CDXLPhysical(mp)
{
}
/---------------------------------------------------------------------------
/ @function:
/ CDXLPhysicalResult::GetDXLOperator
/
/ @doc:
/ Operator type
/
/---------------------------------------------------------------------------
Edxlopid
CDXLPhysicalResult::GetDXLOperator() const
{
return EdxlopPhysicalResult;
}
/---------------------------------------------------------------------------
/ @function:
/ CDXLPhysicalResult::GetOpNameStr
/
/ @doc:
/ Operator name
/
/---------------------------------------------------------------------------
const CWStringConst *
CDXLPhysicalResult::GetOpNameStr() const
{
return CDXLTokens::GetDXLTokenStr(EdxltokenPhysicalResult);
}
/---------------------------------------------------------------------------
/ @function:
/ CDXLPhysicalResult::SerializeToDXL
/
/ @doc:
/ Serialize operator in DXL format
/
/---------------------------------------------------------------------------
void
CDXLPhysicalResult::SerializeToDXL(CXMLSerializer *xml_serializer,
const CDXLNode *dxlnode) const
{
const CWStringConst *element_name = GetOpNameStr();
xml_serializer->OpenElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix), element_name);
/ serialize properties
dxlnode->SerializePropertiesToDXL(xml_serializer);
/ serialize children
dxlnode->SerializeChildrenToDXL(xml_serializer);
xml_serializer->CloseElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix), element_name);
}
#ifdef GPOS_DEBUG
/---------------------------------------------------------------------------
/ @function:
/ CDXLPhysicalResult::AssertValid
/
/ @doc:
/ Checks whether operator node is well-structured
/
/---------------------------------------------------------------------------
void
CDXLPhysicalResult::AssertValid(const CDXLNode *dxlnode,
BOOL validate_children) const
{
GPOS_ASSERT(EdxlresultIndexSentinel >= dxlnode->Arity());
/ check that one time filter is valid
CDXLNode *one_time_filter = (*dxlnode)[EdxlresultIndexOneTimeFilter];
GPOS_ASSERT(EdxlopScalarOneTimeFilter ==
one_time_filter->GetOperator()->GetDXLOperator());
if (validate_children)
{
one_time_filter->GetOperator()->AssertValid(one_time_filter,
validate_children);
}
if (EdxlresultIndexSentinel == dxlnode->Arity())
{
CDXLNode *child_dxlnode = (*dxlnode)[EdxlresultIndexChild];
GPOS_ASSERT(EdxloptypePhysical ==
child_dxlnode->GetOperator()->GetDXLOperatorType());
if (validate_children)
{
child_dxlnode->GetOperator()->AssertValid(child_dxlnode,
validate_children);
}
}
}
#endif / GPOS_DEBUG
/ EOF
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