greenplumn CLogicalAssert 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/operators/CLogicalAssert.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2012 EMC Corp.
/
/ @filename:
/ CLogicalAssert.h
/
/ @doc:
/ Assert operator
/---------------------------------------------------------------------------
#ifndef GPOS_CLogicalAssert_H
#define GPOS_CLogicalAssert_H
#include "gpos/base.h"
#include "gpopt/operators/CExpressionHandle.h"
#include "gpopt/operators/CLogicalUnary.h"
#include "naucrates/dxl/errorcodes.h"
namespace gpopt
{
/---------------------------------------------------------------------------
/ @class:
/ CLogicalAssert
/
/ @doc:
/ Assert operator
/
/---------------------------------------------------------------------------
class CLogicalAssert : public CLogicalUnary
{
private:
/ exception
CException *m_pexc;
public:
CLogicalAssert(const CLogicalAssert &) = delete;
/ ctors
explicit CLogicalAssert(CMemoryPool *mp);
CLogicalAssert(CMemoryPool *mp, CException *pexc);
/ dtor
~CLogicalAssert() override
{
GPOS_DELETE(m_pexc);
}
/ ident accessors
EOperatorId
Eopid() const override
{
return EopLogicalAssert;
}
/ name of operator
const CHAR *
SzId() const override
{
return "CLogicalAssert";
}
/ exception
CException *
Pexc() const
{
return m_pexc;
}
/ match function;
BOOL Matches(COperator *pop) const override;
/-------------------------------------------------------------------------------------
/ Derived Relational Properties
/-------------------------------------------------------------------------------------
/ derive output columns
CColRefSet *DeriveOutputColumns(CMemoryPool *,
CExpressionHandle &) override;
/ dervive keys
CKeyCollection *DeriveKeyCollection(
CMemoryPool *mp, CExpressionHandle &exprhdl) const override;
/ derive max card
CMaxCard DeriveMaxCard(CMemoryPool *mp,
CExpressionHandle &exprhdl) const override;
/ derive constraint property
CPropConstraint *
DerivePropertyConstraint(CMemoryPool *mp,
CExpressionHandle &exprhdl) const override
{
return PpcDeriveConstraintFromPredicates(mp, exprhdl);
}
/-------------------------------------------------------------------------------------
/ Transformations
/-------------------------------------------------------------------------------------
/ candidate set of xforms
CXformSet *PxfsCandidates(CMemoryPool *) const override;
/-------------------------------------------------------------------------------------
/-------------------------------------------------------------------------------------
/-------------------------------------------------------------------------------------
/ conversion function
static CLogicalAssert *
PopConvert(COperator *pop)
{
GPOS_ASSERT(nullptr != pop);
GPOS_ASSERT(EopLogicalAssert == pop->Eopid());
return dynamic_cast<CLogicalAssert *>(pop);
}
/ derive statistics
IStatistics *PstatsDerive(CMemoryPool *mp, CExpressionHandle &exprhdl,
IStatisticsArray *stats_ctxt) const override;
/ debug print
IOstream &OsPrint(IOstream &os) const override;
}; / class CLogicalAssert
} / namespace gpopt
#endif / !GPOS_CLogicalAssert_H
/ EOF
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