쿼리문 잘못된게 있나요?

<query id="xeQueriesC" action="select">
    <tables>
        <table name="files" alias="files"/>
    </tables>
    <columns>
        <column name="upload_target_srl" alias="upload_target_srl" />
    </columns>
    <conditions>
        <condition operation="equal" column="file_srl" var="file_srl" filter="number" />
    </conditions>
</query>

가 안되서

<query id="xeQueriesC" action="select">
    <tables>
        <table name="files" />
    </tables>
    <conditions>
        <condition operation="equal" column="file_srl" var="file_srl" filter="number" />
    </conditions>
</query>
로 바꿔서 했습니다, var에 값이 지정이 안되더군요.

<query id="xeQueriesC" action="select">
    <tables>
        <table name="files" />
    </tables>
    <conditions>
        <condition operation="equal" column="file_srl" var="file_srl" filter="number" />
    </conditions>
</query>

$args = new StdClass();

$args->test_que = Context::get('file_srl');
$output = executeQuery('file.xeQueriesC', $args);
exit(print_r($output));

이렇게 하니까 쿼리값이 나오는데; 왜 이렇나요?