greenplumn CDXLScalarPartListNullTest 源码
greenplumn CDXLScalarPartListNullTest 代码
文件路径：/src/backend/gporca/libnaucrates/src/operators/CDXLScalarPartListNullTest.cpp
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2017 VMware, Inc. or its affiliates.
//
// Implementation of DXL Part list null test expression
#include "naucrates/dxl/operators/CDXLScalarPartListNullTest.h"
#include "gpopt/mdcache/CMDAccessor.h"
#include "naucrates/dxl/operators/CDXLNode.h"
#include "naucrates/dxl/xml/CXMLSerializer.h"
using namespace gpopt;
using namespace gpmd;
using namespace gpos;
using namespace gpdxl;
// Ctor
CDXLScalarPartListNullTest::CDXLScalarPartListNullTest(CMemoryPool *mp,
ULONG partitioning_level,
BOOL is_null)
: CDXLScalar(mp),
m_partitioning_level(partitioning_level),
m_is_null(is_null)
{
}
// Operator type
Edxlopid
CDXLScalarPartListNullTest::GetDXLOperator() const
{
return EdxlopScalarPartListNullTest;
}
// Operator name
const CWStringConst *
CDXLScalarPartListNullTest::GetOpNameStr() const
{
return CDXLTokens::GetDXLTokenStr(EdxltokenScalarPartListNullTest);
}
// Serialize operator in DXL format
void
CDXLScalarPartListNullTest::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(EdxltokenPartLevel),
m_partitioning_level);
xml_serializer->AddAttribute(
CDXLTokens::GetDXLTokenStr(EdxltokenScalarIsNull), m_is_null);
xml_serializer->CloseElement(
CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix), element_name);
}
// partitioning level
ULONG
CDXLScalarPartListNullTest::GetPartitioningLevel() const
{
return m_partitioning_level;
}
// Null Test type (true for 'is null', false for 'is not null')
BOOL
CDXLScalarPartListNullTest::IsNull() const
{
return m_is_null;
}
// does the operator return a boolean result
BOOL
CDXLScalarPartListNullTest::HasBoolResult(CMDAccessor * //md_accessor
) const
{
return true;
}
#ifdef GPOS_DEBUG
// Checks whether operator node is well-structured
void
CDXLScalarPartListNullTest::AssertValid(const CDXLNode *dxlnode,
BOOL // validate_children
) const
{
GPOS_ASSERT(0 == dxlnode->Arity());
}
#endif // GPOS_DEBUG
// conversion function
CDXLScalarPartListNullTest *
CDXLScalarPartListNullTest::Cast(CDXLOperator *dxl_op)
{
GPOS_ASSERT(nullptr != dxl_op);
GPOS_ASSERT(EdxlopScalarPartListNullTest == dxl_op->GetDXLOperator());
return dynamic_cast<CDXLScalarPartListNullTest *>(dxl_op);
}
// EOF
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