<query id="updateDocumentTags" action="update">
    <tables>
        <table name="documents" />
    </tables>
    <columns>
        <column name="tags" var="tags" />
    </columns>
    <conditions>
        <condition operation="equal" column="document_srl" var="document_srl" filter="number" notnull="notnull" />
    </conditions>
</query>
