greenplumn CDXLScalarCaseTest 源码

greenplumn CDXLScalarCaseTest 代码

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

//---------------------------------------------------------------------------
//	Greenplum Database
//	Copyright (C) 2012 EMC Corp.
//
//	@filename:
//		CDXLScalarCaseTest.cpp
//
//	@doc:
//		Implementation of DXL case test
//---------------------------------------------------------------------------

#include "naucrates/dxl/operators/CDXLScalarCaseTest.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:
//		CDXLScalarCaseTest::CDXLScalarCaseTest
//
//	@doc:
//		Ctor
//
//---------------------------------------------------------------------------
CDXLScalarCaseTest::CDXLScalarCaseTest(CMemoryPool *mp, IMDId *mdid_type)
	: CDXLScalar(mp), m_mdid_type(mdid_type)
{
	GPOS_ASSERT(m_mdid_type->IsValid());
}

//---------------------------------------------------------------------------
//	@function:
//		CDXLScalarCaseTest::~CDXLScalarCaseTest
//
//	@doc:
//		Dtor
//
//---------------------------------------------------------------------------
CDXLScalarCaseTest::~CDXLScalarCaseTest()
{
	m_mdid_type->Release();
}

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

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

//---------------------------------------------------------------------------
//	@function:
//		CDXLScalarCaseTest::MdidType
//
//	@doc:
//		Return type id
//
//---------------------------------------------------------------------------
IMDId *
CDXLScalarCaseTest::MdidType() const
{
	return m_mdid_type;
}

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

	xml_serializer->OpenElement(
		CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix), element_name);
	m_mdid_type->Serialize(xml_serializer,
						   CDXLTokens::GetDXLTokenStr(EdxltokenTypeId));
	xml_serializer->CloseElement(
		CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix), element_name);
}

//---------------------------------------------------------------------------
//	@function:
//		CDXLScalarCaseTest::HasBoolResult
//
//	@doc:
//		Does the operator return a boolean result
//
//---------------------------------------------------------------------------
BOOL
CDXLScalarCaseTest::HasBoolResult(CMDAccessor *md_accessor) const
{
	return (IMDType::EtiBool ==
			md_accessor->RetrieveType(m_mdid_type)->GetDatumType());
}

#ifdef GPOS_DEBUG
//---------------------------------------------------------------------------
//	@function:
//		CDXLScalarCaseTest::AssertValid
//
//	@doc:
//		Checks whether operator node is well-structured
//
//---------------------------------------------------------------------------
void
CDXLScalarCaseTest::AssertValid(const CDXLNode *dxlnode,
								BOOL  // validate_children
) const
{
	GPOS_ASSERT(0 == dxlnode->Arity());
	GPOS_ASSERT(m_mdid_type->IsValid());
}
#endif	// GPOS_DEBUG

// EOF

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