<query id="deleteDocumentExtraKeys" action="delete">
    <tables>
        <table name="document_extra_keys" />
    </tables>
    <conditions>
        <condition operation="equal" column="module_srl" var="module_srl" filter="number" notnull="notnull" />
        <condition operation="equal" column="document_srl" var="document_srl" filter="number" pipe="and" />
        <condition operation="equal" column="var_idx" var="var_idx" filter="number" pipe="and" />
    </conditions>
</query>
