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From "David Mollitor (Jira)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-22360) MultiSerDe returns wrong results in last column when the loaded file has more columns than those in table schema
Date Tue, 22 Oct 2019 19:18:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-22360?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16957291#comment-16957291
] 

David Mollitor commented on HIVE-22360:
---------------------------------------

[~ShubhamChaurasia] Another thought would be to apply your chances to the 3.x branch of Hive.

> MultiSerDe returns wrong results in last column when the loaded file has more columns
than those in table schema
> ----------------------------------------------------------------------------------------------------------------
>
>                 Key: HIVE-22360
>                 URL: https://issues.apache.org/jira/browse/HIVE-22360
>             Project: Hive
>          Issue Type: Bug
>          Components: Serializers/Deserializers
>    Affects Versions: 4.0.0
>            Reporter: Shubham Chaurasia
>            Assignee: Shubham Chaurasia
>            Priority: Major
>              Labels: pull-request-available
>         Attachments: HIVE-22360.1.patch, HIVE-22360.2.patch
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> Repro steps:
> Input file:
> {code}
> 1^,1^,^,0^,0^,0 
> 2^,1^,^,0^,1^,0 
> 3^,1^,^,0^,0^,0 
> 4^,1^,^,0^,1^,0
> {code}
> Queries:
> {code}
> CREATE TABLE  n2(colA int, colB tinyint, colC timestamp, colD smallint, colE smallint)
ROW FORMAT SERDE 'org.apache.hadoop.hive.serde2.MultiDelimitSerDe' WITH SERDEPROPERTIES ("field.delim"="^,")STORED
AS TEXTFILE;
> LOAD DATA LOCAL INPATH '/Users/schaurasia/Documents/input_6_cols.csv' OVERWRITE INTO
TABLE n2;
>  select * from n2;
> // wrong last column results here.
> +----------+----------+----------+----------+----------+
> | n2.cola  | n2.colb  | n2.colc  | n2.cold  | n2.cole  |
> +----------+----------+----------+----------+----------+
> | 1        | 1        | NULL     | 0        | NULL     |
> | 2        | 1        | NULL     | 0        | NULL     |
> | 3        | 1        | NULL     | 0        | NULL     |
> | 4        | 1        | NULL     | 0        | NULL     |
> +----------+----------+----------+----------+----------+
> {code}
> Cause:
> In multi-serde parsing, the total length calculation here: https://github.com/apache/hive/blob/rel/release-3.1.2/serde/src/java/org/apache/hadoop/hive/serde2/lazy/LazyStruct.java#L308
does not take extra fields into account.



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