greenplumn CConstraintNegation 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/base/CConstraintNegation.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2012 EMC Corp.
/
/ @filename:
/ CConstraintNegation.h
/
/ @doc:
/ Representation of a negation constraint
/---------------------------------------------------------------------------
#ifndef GPOPT_CConstraintNegation_H
#define GPOPT_CConstraintNegation_H
#include "gpos/base.h"
#include "gpopt/base/CConstraint.h"
namespace gpopt
{
using namespace gpos;
using namespace gpmd;
/---------------------------------------------------------------------------
/ @class:
/ CConstraintNegation
/
/ @doc:
/ Representation of a negation constraint
/
/---------------------------------------------------------------------------
class CConstraintNegation : public CConstraint
{
private:
/ child constraint
CConstraint *m_pcnstr;
public:
CConstraintNegation(const CConstraintNegation &) = delete;
/ ctor
CConstraintNegation(CMemoryPool *mp, CConstraint *pcnstr);
/ dtor
~CConstraintNegation() override;
/ constraint type accessor
EConstraintType
Ect() const override
{
return CConstraint::EctNegation;
}
/ child constraint
CConstraint *
PcnstrChild() const
{
return m_pcnstr;
}
/ is this constraint a contradiction
BOOL
FContradiction() const override
{
return m_pcnstr->IsConstraintUnbounded();
}
/ is this constraint unbounded
BOOL
IsConstraintUnbounded() const override
{
return m_pcnstr->FContradiction();
}
/ scalar expression
CExpression *PexprScalar(CMemoryPool *mp) override;
/ check if there is a constraint on the given column
BOOL
FConstraint(const CColRef *colref) const override
{
return m_pcnstr->FConstraint(colref);
}
/ return a copy of the constraint with remapped columns
CConstraint *PcnstrCopyWithRemappedColumns(CMemoryPool *mp,
UlongToColRefMap *colref_mapping,
BOOL must_exist) override;
/ return constraint on a given column
CConstraint *Pcnstr(CMemoryPool *mp, const CColRef *colref) override;
/ return constraint on a given column set
CConstraint *Pcnstr(CMemoryPool *mp, CColRefSet *pcrs) override;
/ return a clone of the constraint for a different column
CConstraint *PcnstrRemapForColumn(CMemoryPool *mp,
CColRef *colref) const override;
/ print
IOstream &OsPrint(IOstream &os) const override;
}; / class CConstraintNegation
} / namespace gpopt
#endif / !GPOPT_CConstraintNegation_H
/ EOF
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