greenplumn CDXLScalarArrayRef 源码
greenplumn CDXLScalarArrayRef 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLScalarArrayRef.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2014 VMware, Inc. or its affiliates.
//
// @filename:
// CDXLScalarArrayRef.h
//
// @doc:
// Class for representing DXL scalar arrayrefs
//---------------------------------------------------------------------------
#ifndef GPDXL_CDXLScalarArrayRef_H
#define GPDXL_CDXLScalarArrayRef_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLScalar.h"
#include "naucrates/md/IMDId.h"
namespace gpdxl
{
using namespace gpmd;
//---------------------------------------------------------------------------
// @class:
// CDXLScalarArrayRef
//
// @doc:
// Class for representing DXL scalar arrayrefs
//
//---------------------------------------------------------------------------
class CDXLScalarArrayRef : public CDXLScalar
{
private:
// base element type id
IMDId *m_elem_type_mdid;
// element type modifier
INT m_type_modifier;
// array type id
IMDId *m_array_type_mdid;
// return type id
IMDId *m_return_type_mdid;
public:
CDXLScalarArrayRef(const CDXLScalarArrayRef &) = delete;
// ctor
CDXLScalarArrayRef(CMemoryPool *mp, IMDId *elem_type_mdid,
INT type_modifier, IMDId *array_type_mdid,
IMDId *return_type_mdid);
// dtor
~CDXLScalarArrayRef() override;
// ident accessors
Edxlopid GetDXLOperator() const override;
// operator name
const CWStringConst *GetOpNameStr() const override;
// element type id
IMDId *
ElementTypeMDid() const
{
return m_elem_type_mdid;
}
// element type modifier
INT TypeModifier() const;
// array type id
IMDId *
ArrayTypeMDid() const
{
return m_array_type_mdid;
}
// return type id
IMDId *
ReturnTypeMDid() const
{
return m_return_type_mdid;
}
// serialize operator in DXL format
void SerializeToDXL(CXMLSerializer *xml_serializer,
const CDXLNode *dxlnode) const override;
// does the operator return a boolean result
BOOL HasBoolResult(CMDAccessor *md_accessor) const override;
#ifdef GPOS_DEBUG
// checks whether the operator has valid structure, i.e. number and
// types of child nodes
void AssertValid(const CDXLNode *dxlnode,
BOOL validate_children) const override;
#endif // GPOS_DEBUG
// conversion function
static CDXLScalarArrayRef *
Cast(CDXLOperator *dxl_op)
{
GPOS_ASSERT(nullptr != dxl_op);
GPOS_ASSERT(EdxlopScalarArrayRef == dxl_op->GetDXLOperator());
return dynamic_cast<CDXLScalarArrayRef *>(dxl_op);
}
};
} // namespace gpdxl
#endif // !GPDXL_CDXLScalarArrayRef_H
// EOF
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