greenplumn CScalarNAryJoinPredList 源码
greenplumn CScalarNAryJoinPredList 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/operators/CScalarNAryJoinPredList.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2019 VMware, Inc. or its affiliates.
//
// @filename:
// CScalarNAryJoinPredList.h
//
// @doc:
// A list of join predicates for an NAry join that contains join
// types other than inner joins
// (for now we only handle inner joins + LOJs)
//---------------------------------------------------------------------------
#ifndef GPOPT_CScalarNAryJoinPredList_H
#define GPOPT_CScalarNAryJoinPredList_H
#include "gpos/base.h"
#include "gpopt/base/CDrvdProp.h"
#include "gpopt/operators/CScalar.h"
// child number of CScalarNAryJoinPredList expression that contains inner join predicates, must be zero
#define GPOPT_ZERO_INNER_JOIN_PRED_INDEX 0
namespace gpopt
{
using namespace gpos;
//---------------------------------------------------------------------------
// class CScalarNAryJoinPredList
//---------------------------------------------------------------------------
class CScalarNAryJoinPredList : public CScalar
{
private:
public:
CScalarNAryJoinPredList(const CScalarNAryJoinPredList &) = delete;
// ctor
explicit CScalarNAryJoinPredList(CMemoryPool *mp);
// dtor
~CScalarNAryJoinPredList() override = default;
// ident accessors
EOperatorId
Eopid() const override
{
return EopScalarNAryJoinPredList;
}
// return a string for operator name
const CHAR *
SzId() const override
{
return "CScalarNAryJoinPredList";
}
// 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 CScalarNAryJoinPredList *
PopConvert(COperator *pop)
{
return dynamic_cast<CScalarNAryJoinPredList *>(pop);
}
IMDId *
MdidType() const override
{
GPOS_ASSERT(
!"Invalid function call: CScalarNAryJoinPredList::MdidType()");
return nullptr;
}
}; // class CScalarNAryJoinPredList
} // namespace gpopt
#endif // !GPOPT_CScalarNAryJoinPredList_H
// EOF
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