[IGNITE-3448] Wrong count returned by count distinct and similar queries.

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.7
• Fix Version/s: 1.8
• Component/s: sql
• Assignee: Andrey Mashenkov
• Reporter: Alexey Scherbakov
• Created: 07/Jul/16 16:38
• Updated: 17/Jan/17 13:31
• Resolved: 19/Oct/16 18:26

Description

Partitioned cache is deployed on 3 nodes.
The code below outputs incorrect counts:
14
14

       IgniteCache<Integer, Value> cache = grid(0).cache(null);

        cache.put(0, new Value("v1"));
        cache.put(3, new Value("v1"));
        cache.put(5, new Value("v1"));
        cache.put(9, new Value("v1"));

        cache.put(1, new Value("v3"));
        cache.put(15, new Value("v3"));
        cache.put(8, new Value("v3"));

        cache.put(2, new Value("v5"));
        cache.put(12, new Value("v5"));

        cache.put(4, new Value("v2"));
        cache.put(6, new Value("v2"));

        cache.put(7, new Value("v6"));

        cache.put(10, new Value("v7"));

        cache.put(11, new Value("v8"));

        cache.put(13, new Value("v4"));
        cache.put(14, new Value("v4"));

        QueryCursor<List<?>> qry = cache.query(new SqlFieldsQuery("select count(distinct str) from Value"));

        for (List<?> objects : qry)
            System.out.println(objects.get(0));

        qry = cache.query(new SqlFieldsQuery("select count(*) from (select 1 from Value group by str)"));

        for (List<?> objects : qry)
            System.out.println(objects.get(0));
       

Issue Links

• is duplicated by: IGNITE-2143 inner join produce wrong result and is very slow
• links to: GitHub Pull Request #1170
• links to: GitHub Pull Request #1171