greenplumn CMDIdGPDBCtas 源码
greenplumn CMDIdGPDBCtas 代码
文件路径：/src/backend/gporca/libnaucrates/src/md/CMDIdGPDBCtas.cpp
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2014 VMware, Inc. or its affiliates.
//
// @filename:
// CMDIdGPDBCtas.cpp
//
// @doc:
// Implementation of metadata identifiers for GPDB CTAS queries
//---------------------------------------------------------------------------
#include "naucrates/md/CMDIdGPDBCtas.h"
#include "naucrates/dxl/xml/CXMLSerializer.h"
using namespace gpos;
using namespace gpmd;
#define GPMD_GPDB_CTAS_SYSID GPOS_WSZ_LIT("CTAS")
// invalid key
CMDIdGPDBCtas CMDIdGPDBCtas::m_mdid_invalid_key(0);
//---------------------------------------------------------------------------
// @function:
// CMDIdGPDBCtas::CMDIdGPDBCtas
//
// @doc:
// Ctor
//
//---------------------------------------------------------------------------
CMDIdGPDBCtas::CMDIdGPDBCtas(OID oid)
: CMDIdGPDB(CSystemId(IMDId::EmdidGPDB, GPMD_GPDB_CTAS_SYSID), oid)
{
Serialize();
}
//---------------------------------------------------------------------------
// @function:
// CMDIdGPDBCtas::CMDIdGPDBCtas
//
// @doc:
// Copy constructor
//
//---------------------------------------------------------------------------
CMDIdGPDBCtas::CMDIdGPDBCtas(const CMDIdGPDBCtas &mdid_source)
: CMDIdGPDB(mdid_source.Sysid(), mdid_source.Oid())
{
GPOS_ASSERT(mdid_source.IsValid());
GPOS_ASSERT(IMDId::EmdidGPDBCtas == mdid_source.MdidType());
Serialize();
}
//---------------------------------------------------------------------------
// @function:
// CMDIdGPDBCtas::Equals
//
// @doc:
// Checks if the version of the current object is compatible with another version
// of the same object
//
//---------------------------------------------------------------------------
BOOL
CMDIdGPDBCtas::Equals(const IMDId *mdid) const
{
if (nullptr == mdid || EmdidGPDBCtas != mdid->MdidType())
{
return false;
}
const CMDIdGPDBCtas *mdidGPDBCTAS =
CMDIdGPDBCtas::CastMdid(const_cast<IMDId *>(mdid));
return m_oid == mdidGPDBCTAS->Oid();
}
//---------------------------------------------------------------------------
// @function:
// CMDIdGPDBCtas::IsValid
//
// @doc:
// Is the mdid valid
//
//---------------------------------------------------------------------------
BOOL
CMDIdGPDBCtas::IsValid() const
{
return !Equals(&CMDIdGPDBCtas::m_mdid_invalid_key);
}
//---------------------------------------------------------------------------
// @function:
// CMDIdGPDBCtas::OsPrint
//
// @doc:
// Debug print of the id in the provided stream
//
//---------------------------------------------------------------------------
IOstream &
CMDIdGPDBCtas::OsPrint(IOstream &os) const
{
os << "(" << Oid() << "," << VersionMajor() << "." << VersionMinor() << ")";
return os;
}
// EOF
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