Version 1.0
SELECT * FROM ( ON (SELECT * FROM WSRecommenderReduce ( ON item_table AS item_table PARTITION BY item1_column ON user_table AS user_table PARTITION BY item_column [ Item1 ('item1_column') ] [ Item2 ('item2_column') ] [ ItemSimilarity ('similarity_column') ] [ UserItem ('item_column') ] [ UserID ('user_column') ] [ UserPref ('preference_column') ] [ AccumulateItem ({ 'accumulate_item_column' | 'accumulate_item_column_range' }[,...]) ] [ AccumulateUser ({ 'accumulate_user_column' | 'accumulate_user_column_range' }[,...]) ] ) ) AS temporary_table PARTITION BY usr, col1_item2 );