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From "Zoltan Haindrich (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-18191) Vectorization: When text input format is vectorized, TableScanOperator needs to not try to gather statistics
Date Sat, 02 Dec 2017 09:53:01 GMT

    [ https://issues.apache.org/jira/browse/HIVE-18191?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16275495#comment-16275495
] 

Zoltan Haindrich commented on HIVE-18191:
-----------------------------------------

[~mmccline]: I was expecting failures for the previous ticket(HIVE-18191) which have fixed
a small mistake; and have set the correct state of vectorization in the TS operator.
Not gathering stats could have very bad consequences;  I don't understand why this doesn't
 surfaced earlier...stats gathering should be fixed; almost all of the basic stats are depend
on it.

I think the fact that this haven't surfaced earlier should be investigated; because if I understand
the inner workings of these things correctly: that would mean that vectorization is off during
all existing {{ANALYZE TABLE ... COMPUTE STATISTICS}} calls ; which seems odd to me...
cc: [~jcamachorodriguez]

> Vectorization: When text input format is vectorized, TableScanOperator needs to not try
to gather statistics
> ------------------------------------------------------------------------------------------------------------
>
>                 Key: HIVE-18191
>                 URL: https://issues.apache.org/jira/browse/HIVE-18191
>             Project: Hive
>          Issue Type: Bug
>          Components: Hive
>            Reporter: Matt McCline
>            Assignee: Matt McCline
>            Priority: Critical
>         Attachments: HIVE-18191.01.patch
>
>
> That is, to not an try to use row-mode gatherStats method...



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