fixup! DataStream: queue ingested data in order to append bigger chunks

bt5/erp5_wendelin/DocumentTemplateItem/portal_components/document.erp5.DataStream.py

@@ -69,6 +69,7 @@ class DataStream(BigFile):
     q = self.getPortalObject().erp5_sql_connection().query
     r = q('SELECT id, chunk FROM data_stream_queue WHERE uid=%s ORDER BY id'
           % self.getUid(), max_rows=0)[1]
+    if r:
       self._appendData(''.join(x[1] for x in r))
       q('DELETE FROM data_stream_queue WHERE id IN (%s)'
         % ','.join(str(x[0]) for x in r))

bt5/erp5_wendelin/SkinTemplateItem/portal_skins/erp5_wendelin/Alarm_zDataStreamQueue.sql

-SELECT catalog.uid, path FROM data_stream_queue LEFT JOIN catalog USING (uid)
+SELECT DISTINCT catalog.uid, path FROM data_stream_queue LEFT JOIN catalog USING (uid)
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