greenplumn CPattern 源码
greenplumn CPattern 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/operators/CPattern.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2009 Greenplum, Inc.
//
// @filename:
// CPattern.h
//
// @doc:
// Base class for all pattern operators
//---------------------------------------------------------------------------
#ifndef GPOPT_CPattern_H
#define GPOPT_CPattern_H
#include "gpos/base.h"
#include "gpopt/operators/COperator.h"
namespace gpopt
{
using namespace gpos;
//---------------------------------------------------------------------------
// @class:
// CPattern
//
// @doc:
// base class for all pattern operators
//
//---------------------------------------------------------------------------
class CPattern : public COperator
{
private:
public:
CPattern(const CPattern &) = delete;
// ctor
explicit CPattern(CMemoryPool *mp) : COperator(mp)
{
}
// dtor
~CPattern() override = default;
// type of operator
BOOL
FPattern() const override
{
GPOS_ASSERT(!FPhysical() && !FScalar() && !FLogical());
return true;
}
// create derived properties container
CDrvdProp *PdpCreate(CMemoryPool *mp) const override;
// create required properties container
CReqdProp *PrpCreate(CMemoryPool *mp) const override;
// match function
BOOL Matches(COperator *) const override;
// sensitivity to order of inputs
BOOL FInputOrderSensitive() const override;
// check if operator is a pattern leaf
virtual BOOL FLeaf() const = 0;
// return a copy of the operator with remapped columns
COperator *PopCopyWithRemappedColumns(CMemoryPool *mp,
UlongToColRefMap *colref_mapping,
BOOL must_exist) override;
// conversion function
static CPattern *
PopConvert(COperator *pop)
{
GPOS_ASSERT(nullptr != pop);
GPOS_ASSERT(pop->FPattern());
return dynamic_cast<CPattern *>(pop);
}
// helper to check multi-node pattern
static BOOL
FMultiNode(COperator *pop)
{
return COperator::EopPatternMultiLeaf == pop->Eopid() ||
COperator::EopPatternMultiTree == pop->Eopid();
}
}; // class CPattern
} // namespace gpopt
#endif // !GPOPT_CPattern_H
// EOF
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