20: offset := 1;
21: RETURN '';
22: END IF;
23: 24: IF (sys.dbms_datapump.datapump_job) THEN 25: IF (iterate = 0) THEN -- first call: get data from c callback once
26: data := getIndexMetadataCallback (idxinfo, expver, newblock, idxenv);
27: IF (length(data) <= 30000) THEN
28: done := 1; -- short metadata can be returned in one shot