Different data types returned depending on the aggregation mode used to execute a SQL statement

curl --data-urlencode 'stmt=SELECT movie_id, COUNT(*) as agg_count, avg(rating) as avg_rating, sum(rating) as sum_rating, min(rating) as min_rating, max(rating) as max_rating FROM movielens_ratings GROUP BY movie_id ORDER BY movie_id asc' "http://localhost:8984/solr/movielens_ratings/sql?aggregationMode=facet"
{"result-set":{"docs":[
{"min_rating":1.0,"avg_rating":3.8783185840707963,"sum_rating":1753.0,"movie_id":"1","agg_count":452,"max_rating":5.0},
{"min_rating":1.0,"avg_rating":3.831460674157303,"sum_rating":341.0,"movie_id":"10","agg_count":89,"max_rating":5.0},
{"min_rating":1.0,"avg_rating":4.155511811023622,"sum_rating":2111.0,"movie_id":"100","agg_count":508,"max_rating":5.0},
{"min_rating":2.0,"avg_rating":3.0,"sum_rating":30.0,"movie_id":"1000","agg_count":10,"max_rating":4.0},
{"min_rating":1.0,"avg_rating":2.0,"sum_rating":34.0,"movie_id":"1001","agg_count":17,"max_rating":5.0},
{"min_rating":1.0,"avg_rating":1.875,"sum_rating":15.0,"movie_id":"1002","agg_count":8,"max_rating":4.0},
{"min_rating":1.0,"avg_rating":2.25,"sum_rating":18.0,"movie_id":"1003","agg_count":8,"max_rating":4.0},
...

curl --data-urlencode 'stmt=SELECT movie_id, COUNT(*) as agg_count, avg(rating) as avg_rating, sum(rating) as sum_rating, min(rating) as min_rating, max(rating) as max_rating FROM movielens_ratings GROUP BY movie_id ORDER BY movie_id asc' "http://localhost:8984/solr/movielens_ratings/sql?aggregationMode=map_reduce"
{"result-set":{"docs":[
{"min_rating":1,"avg_rating":3.8783185840707963,"sum_rating":1753,"movie_id":"1","agg_count":452,"max_rating":5},
{"min_rating":1,"avg_rating":3.831460674157303,"sum_rating":341,"movie_id":"10","agg_count":89,"max_rating":5},
{"min_rating":1,"avg_rating":4.155511811023622,"sum_rating":2111,"movie_id":"100","agg_count":508,"max_rating":5},
{"min_rating":2,"avg_rating":3.0,"sum_rating":30,"movie_id":"1000","agg_count":10,"max_rating":4},
{"min_rating":1,"avg_rating":2.0,"sum_rating":34,"movie_id":"1001","agg_count":17,"max_rating":5},
{"min_rating":1,"avg_rating":1.875,"sum_rating":15,"movie_id":"1002","agg_count":8,"max_rating":4},
{"min_rating":1,"avg_rating":2.25,"sum_rating":18,"movie_id":"1003","agg_count":8,"max_rating":4},
{"min_rating":1,"avg_rating":3.111111111111111,"sum_rating":28,"movie_id":"1004","agg_count":9,"max_rating":4},
{"min_rating":1,"avg_rating":3.6818181818181817,"sum_rating":81,"movie_id":"1005","agg_count":22,"max_rating":5},