greenplumn CDXLScalarCaseTest 源码
greenplumn CDXLScalarCaseTest 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLScalarCaseTest.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2012 EMC Corp.
//
// @filename:
// CDXLScalarCaseTest.h
//
// @doc:
//
// Class for representing a DXL case test
//---------------------------------------------------------------------------
#ifndef GPDXL_CDXLScalarCaseTest_H
#define GPDXL_CDXLScalarCaseTest_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLScalar.h"
#include "naucrates/md/IMDId.h"
namespace gpdxl
{
using namespace gpos;
using namespace gpmd;
//---------------------------------------------------------------------------
// @class:
// CDXLScalarCaseTest
//
// @doc:
// Class for representing DXL Case Test
//
//---------------------------------------------------------------------------
class CDXLScalarCaseTest : public CDXLScalar
{
private:
// expression type
IMDId *m_mdid_type;
public:
CDXLScalarCaseTest(const CDXLScalarCaseTest &) = delete;
// ctor
CDXLScalarCaseTest(CMemoryPool *mp, IMDId *mdid_type);
// dtor
~CDXLScalarCaseTest() override;
// name of the operator
const CWStringConst *GetOpNameStr() const override;
// expression type
virtual IMDId *MdidType() const;
// DXL Operator ID
Edxlopid GetDXLOperator() const override;
// serialize operator in DXL format
void SerializeToDXL(CXMLSerializer *xml_serializer,
const CDXLNode *dxlnode) const override;
// does the operator return a boolean result
BOOL HasBoolResult(CMDAccessor *md_accessor) const override;
// conversion function
static CDXLScalarCaseTest *
Cast(CDXLOperator *dxl_op)
{
GPOS_ASSERT(nullptr != dxl_op);
GPOS_ASSERT(EdxlopScalarCaseTest == dxl_op->GetDXLOperator());
return dynamic_cast<CDXLScalarCaseTest *>(dxl_op);
}
#ifdef GPOS_DEBUG
// checks whether the operator has valid structure, i.e. number and
// types of child nodes
void AssertValid(const CDXLNode *dxlnode,
BOOL validate_children) const override;
#endif // GPOS_DEBUG
};
} // namespace gpdxl
#endif // !GPDXL_CDXLScalarCaseTest_H
// EOF
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