greenplumn CScalarSubqueryNotExists 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/operators/CScalarSubqueryNotExists.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2011 EMC Corp.
/
/ @filename:
/ CScalarSubqueryNotExists.h
/
/ @doc:
/ Scalar subquery NOT EXISTS operator
/---------------------------------------------------------------------------
#ifndef GPOPT_CScalarSubqueryNotExists_H
#define GPOPT_CScalarSubqueryNotExists_H
#include "gpos/base.h"
#include "gpopt/operators/CScalarSubqueryExistential.h"
namespace gpopt
{
using namespace gpos;
/---------------------------------------------------------------------------
/ @class:
/ CScalarSubqueryNotExists
/
/ @doc:
/ Scalar subquery NOT EXISTS.
/
/---------------------------------------------------------------------------
class CScalarSubqueryNotExists : public CScalarSubqueryExistential
{
private:
public:
CScalarSubqueryNotExists(const CScalarSubqueryNotExists &) = delete;
/ ctor
CScalarSubqueryNotExists(CMemoryPool *mp) : CScalarSubqueryExistential(mp)
{
}
/ dtor
~CScalarSubqueryNotExists() override = default;
/ ident accessors
EOperatorId
Eopid() const override
{
return EopScalarSubqueryNotExists;
}
/ return a string for scalar subquery
const CHAR *
SzId() const override
{
return "CScalarSubqueryNotExists";
}
/ conversion function
static CScalarSubqueryNotExists *
PopConvert(COperator *pop)
{
GPOS_ASSERT(nullptr != pop);
GPOS_ASSERT(EopScalarSubqueryNotExists == pop->Eopid());
return dynamic_cast<CScalarSubqueryNotExists *>(pop);
}
}; / class CScalarSubqueryNotExists
} / namespace gpopt
#endif / !GPOPT_CScalarSubqueryNotExists_H
/ EOF
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