[jira] [Work logged] (HIVE-26507) Do not allow hive to iceberg migration if source table contains CHAR or VARCHAR columns

Thu, 01 Sep 2022 11:56:06 -0700 


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https://issues.apache.org/jira/browse/HIVE-26507?focusedWorklogId=805621&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-805621
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ASF GitHub Bot logged work on HIVE-26507:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 01/Sep/22 18:55
            Start Date: 01/Sep/22 18:55
    Worklog Time Spent: 10m 
      Work Description: sonarcloud[bot] commented on PR #3570:
URL: https://github.com/apache/hive/pull/3570#issuecomment-1234661475

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Issue Time Tracking
-------------------

    Worklog Id:     (was: 805621)
    Time Spent: 20m  (was: 10m)

> Do not allow hive to iceberg migration if source table contains CHAR or 
> VARCHAR columns
> ---------------------------------------------------------------------------------------
>
>                 Key: HIVE-26507
>                 URL: https://issues.apache.org/jira/browse/HIVE-26507
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Rajesh Balamohan
>            Assignee: László Pintér
>            Priority: Major
>              Labels: iceberg, pull-request-available
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> "alter table" statements can be used for generating iceberg metadata 
> information (i.e for converting external tables  -> iceberg tables).
> As part of this process, it also converts certain datatypes to iceberg 
> compatible types (e.g char -> string). "iceberg.mr.schema.auto.conversion" 
> enables this conversion.
> This could cause certain issues at runtime. Here is an example
> {noformat}
> Before conversion:
> ==================
> -- external table
> select count(*) from customer_demographics where cd_gender = 'F' and 
> cd_marital_status = 'U' and cd_education_status = '2 yr Degree';
> 27440
> after conversion:
> =================
> -- iceberg table
> select count(*) from customer_demographics where cd_gender = 'F' and 
> cd_marital_status = 'U' and cd_education_status = '2 yr Degree';
> 0
> select count(*) from customer_demographics where cd_gender = 'F' and 
> cd_marital_status = 'U' and trim(cd_education_status) = '2 yr Degree';
> 27440
>  {noformat}
>  



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