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Posted to issues@hive.apache.org by "Zoltan Haindrich (JIRA)" <ji...@apache.org> on 2017/12/02 09:53:01 UTC
[jira] [Comment Edited] (HIVE-18191) Vectorization: When text input
format is vectorized, TableScanOperator needs to not try to gather
statistics
[ https://issues.apache.org/jira/browse/HIVE-18191?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16275495#comment-16275495 ]
Zoltan Haindrich edited comment on HIVE-18191 at 12/2/17 9:52 AM:
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[~mmccline]: I was expecting failures for the previous ticket(HIVE-17651) 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]
was (Author: kgyrtkirk):
[~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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