The description provided for the
Query field in the
Search Query Performance Report means that if the search term has differences beyond the 128th byte, they will not be aggregated to provide performance statistics in a single row in the report. Rather, there will be multiple rows for each search term with the corresponding performance stats. If you find more than one row with the same
Query, this means that the search string has been truncated in the report and has differences beyond the 128th byte.
Shwetha, AdWords API Team.