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From "ASF GitHub Bot (Jira)" <j...@apache.org>
Subject [jira] [Work logged] (HIVE-20827) Inconsistent results for empty arrays
Date Tue, 09 Jun 2020 16:04:00 GMT

     [ https://issues.apache.org/jira/browse/HIVE-20827?focusedWorklogId=442834&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-442834
]

ASF GitHub Bot logged work on HIVE-20827:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 09/Jun/20 16:03
            Start Date: 09/Jun/20 16:03
    Worklog Time Spent: 10m 
      Work Description: github-actions[bot] commented on pull request #480:
URL: https://github.com/apache/hive/pull/480#issuecomment-641144265


   This pull request has been automatically marked as stale because it has not had recent
activity. It will be closed if no further activity occurs.
   Feel free to reach out on the dev@hive.apache.org list if the patch is in need of reviews.


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

            Worklog Id:     (was: 442834)
    Remaining Estimate: 0h
            Time Spent: 10m

> Inconsistent results for empty arrays
> -------------------------------------
>
>                 Key: HIVE-20827
>                 URL: https://issues.apache.org/jira/browse/HIVE-20827
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Teddy Choi
>            Assignee: Teddy Choi
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 4.0.0
>
>         Attachments: HIVE-20827.1.patch
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> LazySimpleDeserializeRead parses an empty array wrong. For example, a line ',' in a text
file table with a delimiter ',' and schema 'array<int>, array<array<string>>' shows
\[null\], \[\[""\]\], instead of \[\], \[\] with MapReduce engine and vectorized execution
enabled. LazySimpleDeserializeRead has following code; 
> {code:java}
> switch (complexField.complexCategory) {
> case LIST:
>   {
>     // Allow for empty string, etc.
>     final boolean isNext = (fieldPosition <= complexFieldEnd);
> {code}
> Empty string value read should be only applied to string families, not to other data
types. 



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