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Posted to issues-all@impala.apache.org by "Joe McDonnell (Jira)" <ji...@apache.org> on 2022/06/06 19:48:00 UTC
[jira] [Commented] (IMPALA-11337) impala-shell can output the "Fetched X row(s)" line before the actual results
[ https://issues.apache.org/jira/browse/IMPALA-11337?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17550634#comment-17550634 ]
Joe McDonnell commented on IMPALA-11337:
----------------------------------------
It looks like we lost a flush statement as part of this change:
[https://github.com/apache/impala/commit/bc9d7e063dd71f9af75967f8c6af9ac1a6f49149#diff-5496720cbdf14ea8f0a3acf577391bbefe96346b5053ca7fa32590b63c522c15L97]
> impala-shell can output the "Fetched X row(s)" line before the actual results
> -----------------------------------------------------------------------------
>
> Key: IMPALA-11337
> URL: https://issues.apache.org/jira/browse/IMPALA-11337
> Project: IMPALA
> Issue Type: Bug
> Components: Clients
> Affects Versions: Impala 4.2.0
> Reporter: Joe McDonnell
> Priority: Major
>
> In some scenarios, we are seeing that the "Fetched X row(s)" message is output before the actual data:
> {noformat}
> Query: SELECT * FROM test_table ORDER BY id DESC
> Query submitted at: 2022-06-02 23:53:48 (Coordinator: https://coordinator:25000)
> Query progress can be monitored at: https://coordinator:25000/query_plan?query_id=9d47858d6659cb87:2ccbdcdf00000000
> Fetched 1 row(s) in 1.59s
> 0 john 10{noformat}
> The "Fetched X row(s)" message is going to stderr and the results are going to stdout, so this is not covered completely by the current tests. Nonetheless, we should expect the "Fetched X row(s)" output to happen after the results data is written.
> We should add tests for this case and make sure that stdout is flushed prior to writing the "Fetched X row(s)" output.
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