greenplumn CMDPartConstraintGPDB 源码
greenplumn CMDPartConstraintGPDB 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/md/CMDPartConstraintGPDB.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2012 EMC Corp.
//
// @filename:
// CMDPartConstraintGPDB.h
//
// @doc:
// Class representing a GPDB partition constraint in the MD cache
//---------------------------------------------------------------------------
#ifndef GPMD_CMDPartConstraintGPDB_H
#define GPMD_CMDPartConstraintGPDB_H
#include "gpos/base.h"
#include "gpos/string/CWStringDynamic.h"
#include "naucrates/md/CMDName.h"
#include "naucrates/md/IMDPartConstraint.h"
// fwd decl
namespace gpdxl
{
class CXMLSerializer;
}
namespace gpopt
{
class CExpression;
class CMDAccessor;
} // namespace gpopt
namespace gpmd
{
using namespace gpos;
using namespace gpdxl;
//---------------------------------------------------------------------------
// @class:
// CMDPartConstraintGPDB
//
// @doc:
// Class representing a GPDB partition constraint in the MD cache
//
//---------------------------------------------------------------------------
class CMDPartConstraintGPDB : public IMDPartConstraint
{
private:
// memory pool
CMemoryPool *m_mp;
// included default partitions
ULongPtrArray *m_level_with_default_part_array;
// is constraint unbounded
BOOL m_is_unbounded;
// the DXL representation of the part constraint
CDXLNode *m_dxl_node;
public:
// ctor
CMDPartConstraintGPDB(CMemoryPool *mp,
ULongPtrArray *level_with_default_part_array,
BOOL is_unbounded, CDXLNode *dxlnode);
// dtor
~CMDPartConstraintGPDB() override;
// serialize constraint in DXL format
void Serialize(CXMLSerializer *xml_serializer) const override;
// the scalar expression of the part constraint
CExpression *GetPartConstraintExpr(
CMemoryPool *mp, CMDAccessor *md_accessor,
CColRefArray *colref_array) const override;
// included default partitions
ULongPtrArray *GetDefaultPartsArray() const override;
// is constraint unbounded
BOOL IsConstraintUnbounded() const override;
};
} // namespace gpmd
#endif // !GPMD_CMDPartConstraintGPDB_H
// EOF
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