greenplumn CMDRequest 源码
greenplumn CMDRequest 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/md/CMDRequest.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2012 EMC Corp.
//
// @filename:
// CMDRequest.h
//
// @doc:
// Class for a representing MD requests
//---------------------------------------------------------------------------
#ifndef GPMD_CMDRequest_H
#define GPMD_CMDRequest_H
#include "gpos/base.h"
#include "gpos/common/CDynamicPtrArray.h"
#include "gpos/common/CRefCount.h"
#include "naucrates/md/CSystemId.h"
#include "naucrates/md/IMDFunction.h"
#include "naucrates/md/IMDType.h"
namespace gpmd
{
using namespace gpos;
//--------------------------------------------------------------------------
// @class:
// CMDRequest
//
// @doc:
// Class for representing MD requests
//
//--------------------------------------------------------------------------
class CMDRequest : public CRefCount
{
public:
// fwd decl
struct SMDTypeRequest;
struct SMDFuncRequest;
// array of type requests
using SMDTypeRequestArray = CDynamicPtrArray<SMDTypeRequest, CleanupDelete>;
//---------------------------------------------------------------------------
// @class:
// SMDTypeRequest
//
// @doc:
// Struct for representing requests for types metadata
//
//---------------------------------------------------------------------------
struct SMDTypeRequest
{
// system id
CSystemId m_sysid;
// type info
IMDType::ETypeInfo m_type_info;
// ctor
SMDTypeRequest(CSystemId sysid, IMDType::ETypeInfo type_info)
: m_sysid(sysid), m_type_info(type_info)
{
}
};
private:
// memory pool
CMemoryPool *m_mp;
// array of mdids
IMdIdArray *m_mdid_array;
// type info requests
SMDTypeRequestArray *m_mdtype_request_array;
// serialize system id
CWStringDynamic *GetStrRepr(CSystemId sysid);
public:
CMDRequest(const CMDRequest &) = delete;
// ctor
CMDRequest(CMemoryPool *mp, IMdIdArray *mdid_array,
SMDTypeRequestArray *mdtype_request_array);
// ctor: type request only
CMDRequest(CMemoryPool *mp, SMDTypeRequest *md_type_request);
// dtor
~CMDRequest() override;
// accessors
// array of mdids
IMdIdArray *
GetMdIdArray() const
{
return m_mdid_array;
}
// array of type info requests
SMDTypeRequestArray *
GetMDTypeRequestArray() const
{
return m_mdtype_request_array;
}
// serialize request in DXL format
virtual void Serialize(gpdxl::CXMLSerializer *xml_serializer);
};
} // namespace gpmd
#endif // !GPMD_CMDRequest_H
// EOF
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