greenplumn CDXLScalarSwitchCase 代码
文件路径：/src/backend/gporca/libnaucrates/src/operators/CDXLScalarSwitchCase.cpp
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2012 EMC Corp.
/
/ @filename:
/ CDXLScalarSwitchCase.cpp
/
/ @doc:
/ Implementation of DXL Switch case
/---------------------------------------------------------------------------
#include "naucrates/dxl/operators/CDXLScalarSwitchCase.h"
#include "gpopt/mdcache/CMDAccessor.h"
#include "naucrates/dxl/operators/CDXLNode.h"
#include "naucrates/dxl/xml/CXMLSerializer.h"
using namespace gpopt;
using namespace gpos;
using namespace gpdxl;
/---------------------------------------------------------------------------
/ @function:
/ CDXLScalarSwitchCase::CDXLScalarSwitchCase
/
/ @doc:
/ Ctor
/
/---------------------------------------------------------------------------
CDXLScalarSwitchCase::CDXLScalarSwitchCase(CMemoryPool *mp) : CDXLScalar(mp)
{
}
/---------------------------------------------------------------------------
/ @function:
/ CDXLScalarSwitchCase::GetDXLOperator
/
/ @doc:
/ Operator type
/
/---------------------------------------------------------------------------
Edxlopid
CDXLScalarSwitchCase::GetDXLOperator() const
{
return EdxlopScalarSwitchCase;
}
/---------------------------------------------------------------------------
/ @function:
/ CDXLScalarSwitchCase::GetOpNameStr
/
/ @doc:
/ Operator name
/
/---------------------------------------------------------------------------
const CWStringConst *
CDXLScalarSwitchCase::GetOpNameStr() const
{
return CDXLTokens::GetDXLTokenStr(EdxltokenScalarSwitchCase);
}
/---------------------------------------------------------------------------
/ @function:
/ CDXLScalarSwitchCase::SerializeToDXL
/
/ @doc:
/ Serialize operator in DXL format
/
/---------------------------------------------------------------------------
void
CDXLScalarSwitchCase::SerializeToDXL(CXMLSerializer *xml_serializer,
const CDXLNode *dxlnode) const
{
const CWStringConst *element_name = GetOpNameStr();
xml_serializer->OpenElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix), element_name);
dxlnode->SerializeChildrenToDXL(xml_serializer);
xml_serializer->CloseElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix), element_name);
}
#ifdef GPOS_DEBUG
/---------------------------------------------------------------------------
/ @function:
/ CDXLScalarSwitchCase::AssertValid
/
/ @doc:
/ Checks whether operator node is well-structured
/
/---------------------------------------------------------------------------
void
CDXLScalarSwitchCase::AssertValid(const CDXLNode *dxlnode,
BOOL validate_children) const
{
const ULONG arity = dxlnode->Arity();
GPOS_ASSERT(2 == arity);
for (ULONG idx = 0; idx < arity; ++idx)
{
CDXLNode *dxlnode_arg = (*dxlnode)[idx];
GPOS_ASSERT(EdxloptypeScalar ==
dxlnode_arg->GetOperator()->GetDXLOperatorType());
if (validate_children)
{
dxlnode_arg->GetOperator()->AssertValid(dxlnode_arg,
validate_children);
}
}
}
#endif / GPOS_DEBUG
/ EOF
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