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The order of the tuple stream after the group by may vary depending on the implementation. Thus, the contents of the constructed arrays may be different depending on the implementation. I suggest adding order by clauses to make the contents of the arrays consistent across implementations. e.g. add "order by $state" after "group by $state" add "order by $category" after "group by $category"
Bug fix committed to cvs as suggested in comment #0
We also need to update the result to match the new ordering. I will do it.