greenplumn CDXLLogicalCTEAnchor 源码

greenplumn CDXLLogicalCTEAnchor 代码

文件路径：/src/backend/gporca/libnaucrates/src/operators/CDXLLogicalCTEAnchor.cpp

//---------------------------------------------------------------------------
//	Greenplum Database
//	Copyright (C) 2012 EMC Corp.
//
//	@filename:
//		CDXLLogicalCTEAnchor.cpp
//
//	@doc:
//		Implementation of DXL logical CTE anchors
//
//---------------------------------------------------------------------------

#include "naucrates/dxl/operators/CDXLLogicalCTEAnchor.h"

#include "naucrates/dxl/operators/CDXLNode.h"
#include "naucrates/dxl/xml/CXMLSerializer.h"
#include "naucrates/dxl/xml/dxltokens.h"

using namespace gpos;
using namespace gpdxl;

//---------------------------------------------------------------------------
//	@function:
//		CDXLLogicalCTEAnchor::CDXLLogicalCTEAnchor
//
//	@doc:
//		Ctor
//
//---------------------------------------------------------------------------
CDXLLogicalCTEAnchor::CDXLLogicalCTEAnchor(CMemoryPool *mp, ULONG id)
	: CDXLLogical(mp), m_id(id)
{
}

//---------------------------------------------------------------------------
//	@function:
//		CDXLLogicalCTEAnchor::GetDXLOperator
//
//	@doc:
//		Operator type
//
//---------------------------------------------------------------------------
Edxlopid
CDXLLogicalCTEAnchor::GetDXLOperator() const
{
	return EdxlopLogicalCTEAnchor;
}

//---------------------------------------------------------------------------
//	@function:
//		CDXLLogicalCTEAnchor::GetOpNameStr
//
//	@doc:
//		Operator name
//
//---------------------------------------------------------------------------
const CWStringConst *
CDXLLogicalCTEAnchor::GetOpNameStr() const
{
	return CDXLTokens::GetDXLTokenStr(EdxltokenLogicalCTEAnchor);
}

//---------------------------------------------------------------------------
//	@function:
//		CDXLLogicalCTEAnchor::SerializeToDXL
//
//	@doc:
//		Serialize operator in DXL format
//
//---------------------------------------------------------------------------
void
CDXLLogicalCTEAnchor::SerializeToDXL(CXMLSerializer *xml_serializer,
									 const CDXLNode *dxlnode) const
{
	const CWStringConst *element_name = GetOpNameStr();

	xml_serializer->OpenElement(
		CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix), element_name);
	xml_serializer->AddAttribute(CDXLTokens::GetDXLTokenStr(EdxltokenCTEId),
								 Id());

	dxlnode->SerializeChildrenToDXL(xml_serializer);
	xml_serializer->CloseElement(
		CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix), element_name);
}

#ifdef GPOS_DEBUG
//---------------------------------------------------------------------------
//	@function:
//		CDXLLogicalCTEAnchor::AssertValid
//
//	@doc:
//		Checks whether operator node is well-structured
//
//---------------------------------------------------------------------------
void
CDXLLogicalCTEAnchor::AssertValid(const CDXLNode *dxlnode,
								  BOOL validate_children) const
{
	GPOS_ASSERT(1 == dxlnode->Arity());

	CDXLNode *child_dxlnode = (*dxlnode)[0];
	GPOS_ASSERT(EdxloptypeLogical ==
				child_dxlnode->GetOperator()->GetDXLOperatorType());

	if (validate_children)
	{
		child_dxlnode->GetOperator()->AssertValid(child_dxlnode,
												  validate_children);
	}
}
#endif	// GPOS_DEBUG

// EOF

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