greenplumn CScalarIsDistinctFrom 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/operators/CScalarIsDistinctFrom.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2011 EMC Corp.
/
/ @filename:
/ CScalarIsDistinctFrom.h
/
/ @doc:
/ Is distinct from operator
/---------------------------------------------------------------------------
#ifndef GPOPT_CScalarIsDistinctFrom_H
#define GPOPT_CScalarIsDistinctFrom_H
#include "gpos/base.h"
#include "gpopt/operators/CScalarCmp.h"
namespace gpopt
{
using namespace gpos;
/---------------------------------------------------------------------------
/ @class:
/ CScalarIsDistinctFrom
/
/ @doc:
/ Is distinct from operator
/
/---------------------------------------------------------------------------
class CScalarIsDistinctFrom : public CScalarCmp
{
private:
public:
CScalarIsDistinctFrom(const CScalarIsDistinctFrom &) = delete;
/ ctor
CScalarIsDistinctFrom(CMemoryPool *mp, IMDId *mdid_op,
const CWStringConst *pstrOp)
: CScalarCmp(mp, mdid_op, pstrOp, IMDType::EcmptIDF)
{
GPOS_ASSERT(mdid_op->IsValid());
}
/ dtor
~CScalarIsDistinctFrom() override = default;
/ ident accessors
EOperatorId
Eopid() const override
{
return EopScalarIsDistinctFrom;
}
/ boolean expression evaluation
EBoolEvalResult Eber(ULongPtrArray *pdrgpulChildren) const override;
/ return a string for operator name
const CHAR *
SzId() const override
{
return "CScalarIsDistinctFrom";
}
BOOL Matches(COperator *pop) const override;
/ conversion function
static CScalarIsDistinctFrom *PopConvert(COperator *pop);
/ get commuted scalar IDF operator
CScalarCmp *PopCommutedOp(CMemoryPool *mp) override;
}; / class CScalarIsDistinctFrom
} / namespace gpopt
#endif / !GPOPT_CScalarIsDistinctFrom_H
/ EOF
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