Timothy Potter created SOLR-9372:
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Summary: Different data types returned depending on the
aggregation mode used to execute a SQL statement
Key: SOLR-9372
URL: https://issues.apache.org/jira/browse/SOLR-9372
Project: Solr
Issue Type: Bug
Security Level: Public (Default Security Level. Issues are Public)
Affects Versions: 6.1
Reporter: Timothy Potter
The type of aggregation fields returned differs based on the aggregation mode.
Here's an example:
{code}
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},
...
{code}
{code}
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},
{code}
The rating field is an integer in Solr (TrieIntField) so one would expect the
sum, min, max functions to return Long type but when using
aggregationMode=facet, we get back doubles. Data types should be consistent so
client applications don't have to account for this weirdness.
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