[jira] [Resolved] (IMPALA-11444) Wrong results in reading wide rows from ORC

["Quanlong Huang (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IMPALA-11444?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Quanlong Huang resolved IMPALA-11444.
-------------------------------------
    Fix Version/s: Impala 3.4.2
       Resolution: Fixed

> Wrong results in reading wide rows from ORC
> -------------------------------------------
>
>                 Key: IMPALA-11444
>                 URL: https://issues.apache.org/jira/browse/IMPALA-11444
>             Project: IMPALA
>          Issue Type: Bug
>          Components: Backend
>    Affects Versions: Impala 3.4.0, Impala 3.4.1
>            Reporter: Quanlong Huang
>            Assignee: Quanlong Huang
>            Priority: Blocker
>              Labels: correctness
>             Fix For: Impala 3.4.2
>
>
> The bug only exists in 3.4 branches where we have IMPALA-9228 and is missing IMPALA-9469.
> When reading from a wide table with tuple size larger than , the orc scanner produces wrong results. The issue can be reproduced using the attached CreateTable stmt and the ORC file.
> {code:sql}
> $ bin/impala-shell.sh --quiet -f create-table-512cols.sql
> $ bin/impala-shell.sh -B --quiet -q 'show table stats orc_tbl_512cols'
> -1	0	0B	NOT CACHED	NOT CACHED	ORC	false	hdfs://localhost:20500/test-warehouse/orc_tbl_512cols
> $ hdfs dfs -put widerow_512cols.orc hdfs://localhost:20500/test-warehouse/orc_tbl_512cols
> $ bin/impala-shell.sh -q 'refresh orc_tbl_512cols'
> {code}
> Then run the following query:
> {code:sql}
> $ bin/impala-shell.sh -B -q "select * from orc_tbl_512cols where col0 = '1'"
> {code}
> The result should be only one row with all values as '1'. However, we get one rwo with all values as '1024'.



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