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Posted to issues@impala.apache.org by "Tim Armstrong (JIRA)" <ji...@apache.org> on 2019/01/22 20:13:01 UTC

[jira] [Created] (IMPALA-8096) Limit on #rows returned from query

Tim Armstrong created IMPALA-8096:
-------------------------------------

             Summary: Limit on #rows returned from query
                 Key: IMPALA-8096
                 URL: https://issues.apache.org/jira/browse/IMPALA-8096
             Project: IMPALA
          Issue Type: Sub-task
          Components: Backend
            Reporter: Tim Armstrong


Sometimes users accidentally run queries that return a large number of rows, e.g.
{code}
SELECT * FROM table
{code}

When they really only need to look at a subset of the rows. It would be useful to have a guardrail to fail queries the return more rows than a particular limit. Maybe it would make sense to integrate with IMPALA-4268 so that the query is failed when the buffer fills up, but it may also be useful to have an easier-to-understand option based on #rows.




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