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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