greenplumn CScalarArray 源码
greenplumn CScalarArray 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/operators/CScalarArray.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2012 EMC Corp.
//
// @filename:
// CScalarArray.h
//
// @doc:
// Class for scalar arrays
//---------------------------------------------------------------------------
#ifndef GPOPT_CScalarArray_H
#define GPOPT_CScalarArray_H
#include "gpos/base.h"
#include "gpopt/operators/CScalar.h"
#include "gpopt/operators/CScalarConst.h"
#include "naucrates/md/IMDId.h"
namespace gpopt
{
using namespace gpos;
using namespace gpmd;
using CScalarConstArray = CDynamicPtrArray<CScalarConst, CleanupRelease>;
//---------------------------------------------------------------------------
// @class:
// CScalarArray
//
// @doc:
// Scalar array
//
//---------------------------------------------------------------------------
class CScalarArray : public CScalar
{
private:
// element type id
IMDId *m_pmdidElem;
// array type id
IMDId *m_pmdidArray;
// is array multidimensional
BOOL m_fMultiDimensional;
// const values
CScalarConstArray *m_pdrgPconst;
public:
CScalarArray(const CScalarArray &) = delete;
// ctor
CScalarArray(CMemoryPool *mp, IMDId *elem_type_mdid, IMDId *array_type_mdid,
BOOL is_multidimenstional);
// ctor
CScalarArray(CMemoryPool *mp, IMDId *elem_type_mdid, IMDId *array_type_mdid,
BOOL is_multidimenstional, CScalarConstArray *pdrgPconst);
// dtor
~CScalarArray() override;
// ident accessors
EOperatorId
Eopid() const override
{
return EopScalarArray;
}
// return a string for aggregate function
const CHAR *
SzId() const override
{
return "CScalarArray";
}
// operator specific hash function
ULONG HashValue() const override;
// match function
BOOL Matches(COperator *pop) const override;
// sensitivity to order of inputs
BOOL
FInputOrderSensitive() const override
{
return true;
}
// return a copy of the operator with remapped columns
COperator *
PopCopyWithRemappedColumns(CMemoryPool *, //mp,
UlongToColRefMap *, //colref_mapping,
BOOL //must_exist
) override
{
return PopCopyDefault();
}
// conversion function
static CScalarArray *
PopConvert(COperator *pop)
{
GPOS_ASSERT(nullptr != pop);
GPOS_ASSERT(EopScalarArray == pop->Eopid());
return dynamic_cast<CScalarArray *>(pop);
}
// element type id
IMDId *PmdidElem() const;
// array type id
IMDId *PmdidArray() const;
// is array multi-dimensional
BOOL FMultiDimensional() const;
// type of expression's result
IMDId *MdidType() const override;
// CScalarConst array
CScalarConstArray *PdrgPconst() const;
// print
IOstream &OsPrint(IOstream &os) const override;
}; // class CScalarArray
} // namespace gpopt
#endif // !GPOPT_CScalarArray_H
// EOF
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