greenplumn CDXLScalarPartListValues 源码
greenplumn CDXLScalarPartListValues 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLScalarPartListValues.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2017 VMware, Inc. or its affiliates.
//
// Class for representing DXL Part List Values expressions
// These expressions indicate the constant values for the list partition
//---------------------------------------------------------------------------
#ifndef GPDXL_CDXLScalarPartListValues_H
#define GPDXL_CDXLScalarPartListValues_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLScalar.h"
namespace gpdxl
{
class CDXLScalarPartListValues : public CDXLScalar
{
private:
// partitioning level
ULONG m_partitioning_level;
// result type
IMDId *m_result_type_mdid;
// element type
IMDId *m_elem_type_mdid;
public:
CDXLScalarPartListValues(const CDXLScalarPartListValues &) = delete;
// ctor
CDXLScalarPartListValues(CMemoryPool *mp, ULONG partitioning_level,
IMDId *result_type_mdid, IMDId *elem_type_mdid);
// dtor
~CDXLScalarPartListValues() override;
// operator type
Edxlopid GetDXLOperator() const override;
// operator name
const CWStringConst *GetOpNameStr() const override;
// partitioning level
ULONG GetPartitioningLevel() const;
// result type
IMDId *GetResultTypeMdId() const;
// element type
IMDId *GetElemTypeMdId() const;
// 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 CDXLScalarPartListValues *Cast(CDXLOperator *dxl_op);
};
} // namespace gpdxl
#endif // !GPDXL_CDXLScalarPartListValues_H
// EOF
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