greenplumn CScalarCaseTest 源码
greenplumn CScalarCaseTest 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/operators/CScalarCaseTest.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2012 EMC Corp.
//
// @filename:
// CScalarCaseTest.h
//
// @doc:
// Scalar case test operator
//---------------------------------------------------------------------------
#ifndef GPOPT_CScalarCaseTest_H
#define GPOPT_CScalarCaseTest_H
#include "gpos/base.h"
#include "gpopt/base/CDrvdProp.h"
#include "gpopt/operators/CScalar.h"
namespace gpopt
{
using namespace gpos;
//---------------------------------------------------------------------------
// @class:
// CScalarCaseTest
//
// @doc:
// Scalar case test operator
//
//---------------------------------------------------------------------------
class CScalarCaseTest : public CScalar
{
private:
// type id
IMDId *m_mdid_type;
public:
CScalarCaseTest(const CScalarCaseTest &) = delete;
// ctor
CScalarCaseTest(CMemoryPool *mp, IMDId *mdid_type);
// dtor
~CScalarCaseTest() override;
// ident accessors
EOperatorId
Eopid() const override
{
return EopScalarCaseTest;
}
// return a string for operator name
const CHAR *
SzId() const override
{
return "CScalarCaseTest";
}
// the type of the scalar expression
IMDId *
MdidType() const override
{
return m_mdid_type;
}
// operator specific hash function
ULONG HashValue() const override;
// match function
BOOL Matches(COperator *pop) const override;
// sensitivity to order of inputs
BOOL FInputOrderSensitive() const override;
// return a copy of the operator with remapped columns
COperator *
PopCopyWithRemappedColumns(CMemoryPool *, //mp,
UlongToColRefMap *, //colref_mapping,
BOOL //must_exist
) override
{
return PopCopyDefault();
}
// conversion function
static CScalarCaseTest *
PopConvert(COperator *pop)
{
GPOS_ASSERT(nullptr != pop);
GPOS_ASSERT(EopScalarCaseTest == pop->Eopid());
return dynamic_cast<CScalarCaseTest *>(pop);
}
}; // class CScalarCaseTest
} // namespace gpopt
#endif // !GPOPT_CScalarCaseTest_H
// EOF
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