presto-raptor-legacy/src/main/java/io/prestosql/plugin/raptor/legacy/RaptorMetadata.java/RaptorMetadata/dropTable
class RaptorMetadata:    @Override
    public void dropTable(ConnectorSession session, ConnectorTableHandle tableHandle)
    {
        RaptorTableHandle raptorHandle = (RaptorTableHandle) tableHandle;
        shardManager.dropTable(raptorHandle.getTableId());
    }