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def sessions(session, args, options):
    sys = session.get_schema('sys')
    session_view = sys.get_table('session')
    query = session_view.select(
        'thd_id', 'conn_id', 'user', 'db', 'current_statement',
        'statement_latency AS latency', 'current_memory AS memory')
    if (options.has_key('limit')):
        limit = int(options['limit'])
        query.limit(limit)

    result = query.execute()
    report = [result.get_column_names()]
    for row in result.fetch_all():
        report.append(list(row))

    return {'report': report}

shell.register_report(
    'sessions',
    'list',
    sessions,
    {
        'brief': 'Shows which sessions exist.',
        'details': ['You need the SELECT privilege on sys.session view and the underlying tables and functions used by it.'],
        'options': [
            {
                'name': 'limit',
                'brief': 'The maximum number of rows to return.',
                'shortcut': 'l',
                'type': 'integer'
            }
        ],
        'argc': '0'
    }
)