<p>Kamailio version 4.4.2.</p>

<p>Consider this logic:<br>
$avp(s:testvar) = 'test';<br>
avp_db_query("select value from test where id = 1","$avp(s:testvar)");</p>

<p>I don't know if this is intended behaviour. If row exists but "value" field is empty (not NULL), $avp(s:testvar) still seems to contain 'test' as value after the query. I think it should be ''. </p>

<p>This can be confusing.</p>

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