greenplumn CLogicalLeftSemiCorrelatedApplyIn 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/operators/CLogicalLeftSemiCorrelatedApplyIn.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2014 VMware, Inc. or its affiliates.
/
/ @filename:
/ CLogicalLeftSemiCorrelatedApplyIn.h
/
/ @doc:
/ Logical Left Semi Correlated Apply operator;
/ a variant of left semi apply that captures the need to implement a
/ correlated-execution strategy on the physical side
/---------------------------------------------------------------------------
#ifndef GPOPT_CLogicalLeftSemiCorrelatedApplyIn_H
#define GPOPT_CLogicalLeftSemiCorrelatedApplyIn_H
#include "gpos/base.h"
#include "gpopt/operators/CLogicalLeftSemiApplyIn.h"
namespace gpopt
{
/---------------------------------------------------------------------------
/ @class:
/ CLogicalLeftSemiCorrelatedApplyIn
/
/ @doc:
/ Logical Apply operator used in scalar subquery transformations
/
/---------------------------------------------------------------------------
class CLogicalLeftSemiCorrelatedApplyIn : public CLogicalLeftSemiApplyIn
{
private:
public:
CLogicalLeftSemiCorrelatedApplyIn(
const CLogicalLeftSemiCorrelatedApplyIn &) = delete;
/ ctor for patterns
explicit CLogicalLeftSemiCorrelatedApplyIn(CMemoryPool *mp);
/ ctor
CLogicalLeftSemiCorrelatedApplyIn(CMemoryPool *mp,
CColRefArray *pdrgpcrInner,
EOperatorId eopidOriginSubq);
/ dtor
~CLogicalLeftSemiCorrelatedApplyIn() override = default;
/ ident accessors
EOperatorId
Eopid() const override
{
return EopLogicalLeftSemiCorrelatedApplyIn;
}
/ return a string for operator name
const CHAR *
SzId() const override
{
return "CLogicalLeftSemiCorrelatedApplyIn";
}
/ applicable transformations
CXformSet *PxfsCandidates(CMemoryPool *mp) const override;
/ return true if operator is a correlated apply
BOOL
FCorrelated() const override
{
return true;
}
/ return a copy of the operator with remapped columns
COperator *PopCopyWithRemappedColumns(CMemoryPool *mp,
UlongToColRefMap *colref_mapping,
BOOL must_exist) override;
/ conversion function
static CLogicalLeftSemiCorrelatedApplyIn *
PopConvert(COperator *pop)
{
GPOS_ASSERT(nullptr != pop);
GPOS_ASSERT(EopLogicalLeftSemiCorrelatedApplyIn == pop->Eopid());
return dynamic_cast<CLogicalLeftSemiCorrelatedApplyIn *>(pop);
}
}; / class CLogicalLeftSemiCorrelatedApplyIn
} / namespace gpopt
#endif / !GPOPT_CLogicalLeftSemiCorrelatedApplyIn_H
/ EOF
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