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From "Valentin Kulichenko (JIRA)" <j...@apache.org>
Subject [jira] [Created] (IGNITE-3487) _key and _val fields should be excluded from 'select * from' queries
Date Fri, 15 Jul 2016 22:59:20 GMT
Valentin Kulichenko created IGNITE-3487:
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             Summary: _key and _val fields should be excluded from 'select * from' queries
                 Key: IGNITE-3487
                 URL: https://issues.apache.org/jira/browse/IGNITE-3487
             Project: Ignite
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 1.6
            Reporter: Valentin Kulichenko
             Fix For: 2.0


We have a pretty serious usability issue - predefined {{_key}} and {{_val}} fields are returned
when query like {{select * from}} is executed. First of all, this is counterintuitive because
user never defines or configures these fields. Second of all, they actually duplicate all
other fields. And finally, they cause serialization exceptions because classes for key and
value are not always available.

We should exclude these fields from {{select * from}} queries, but this is a compatibility
breaking change. It should be done in 2.0.



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