greenplumn CMDIdGPDBCtas 源码
greenplumn CMDIdGPDBCtas 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/md/CMDIdGPDBCtas.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2014 VMware, Inc. or its affiliates.
//
// @filename:
// CMDIdGPDBCtas.h
//
// @doc:
// Class for representing mdids for GPDB CTAS queries
//---------------------------------------------------------------------------
#ifndef GPMD_CMDIdGPDBCTAS_H
#define GPMD_CMDIdGPDBCTAS_H
#include "gpos/base.h"
#include "naucrates/md/CMDIdGPDB.h"
namespace gpmd
{
using namespace gpos;
//---------------------------------------------------------------------------
// @class:
// CMDIdGPDBCtas
//
// @doc:
// Class for representing ids of GPDB CTAS metadata objects
//
//---------------------------------------------------------------------------
class CMDIdGPDBCtas : public CMDIdGPDB
{
public:
// ctor
explicit CMDIdGPDBCtas(OID oid);
// copy ctor
explicit CMDIdGPDBCtas(const CMDIdGPDBCtas &mdid_source);
// mdid type
EMDIdType
MdidType() const override
{
return EmdidGPDBCtas;
}
// source system id
CSystemId
Sysid() const override
{
return m_sysid;
}
// equality check
BOOL Equals(const IMDId *mdid) const override;
// is the mdid valid
BOOL IsValid() const override;
// debug print of the metadata id
IOstream &OsPrint(IOstream &os) const override;
// invalid mdid
static CMDIdGPDBCtas m_mdid_invalid_key;
// const converter
static const CMDIdGPDBCtas *
CastMdid(const IMDId *mdid)
{
GPOS_ASSERT(nullptr != mdid && EmdidGPDBCtas == mdid->MdidType());
return dynamic_cast<const CMDIdGPDBCtas *>(mdid);
}
// non-const converter
static CMDIdGPDBCtas *
CastMdid(IMDId *mdid)
{
GPOS_ASSERT(nullptr != mdid && EmdidGPDBCtas == mdid->MdidType());
return dynamic_cast<CMDIdGPDBCtas *>(mdid);
}
};
} // namespace gpmd
#endif // !GPMD_CMDIdGPDBCTAS_H
// EOF
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