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
相关信息
相关文章
greenplumn CExpressionFactorizer 源码
greenplumn CExpressionHandle 源码
greenplumn CExpressionPreprocessor 源码
greenplumn CExpressionUtils 源码