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Posted to issues@drill.apache.org by "Arina Ielchiieva (JIRA)" <ji...@apache.org> on 2017/10/18 15:06:01 UTC
[jira] [Assigned] (DRILL-5822) Select * on directory containing
multiple json files (one or more empty) with same schema doesn't preserve
column order
[ https://issues.apache.org/jira/browse/DRILL-5822?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Arina Ielchiieva reassigned DRILL-5822:
---------------------------------------
Assignee: Vitalii Diravka
> Select * on directory containing multiple json files (one or more empty) with same schema doesn't preserve column order
> -----------------------------------------------------------------------------------------------------------------------
>
> Key: DRILL-5822
> URL: https://issues.apache.org/jira/browse/DRILL-5822
> Project: Apache Drill
> Issue Type: Bug
> Components: Storage - JSON
> Affects Versions: 1.11.0
> Reporter: Prasad Nagaraj Subramanya
> Assignee: Vitalii Diravka
> Fix For: 1.12.0
>
>
> Repro steps
> 1) Have multiple json files in a directory having the same schema
> 2) Also have one or more empty files
> Scenarios
> 1) Only one minor fragment{code}select * from dfs.`/json_dir`;{code}
> {code}Result:
> +----------+------------+------------------------------------------+-----------------+-----------+----------------------------+---------+--------------+----------------+------------------------+
> | row_key | p_partkey | p_name | p_mfgr | p_brand | p_type | p_size | p_container | p_retailprice | p_comment |
> +----------+------------+------------------------------------------+-----------------+-----------+----------------------------+---------+--------------+----------------+------------------------+
> | 1 | 1 | goldenrod lace spring peru powder | Manufacturer#1 | Brand#13 | PROMO BURNISHED COPPER | 7 | JUMBO PKG | 901.0 | ly. slyly ironi |
> | 2 | 2 | blush rosy metallic lemon navajo | Manufacturer#1 | Brand#13 | LARGE BRUSHED BRASS | 1 | LG CASE | 902.0 | lar accounts amo |
> {code}
> 2) One minor fragment per file
> {code}alter session set `planner.slice_target`=1;
> select * from dfs.`/json_dir`;{code}
> Result:
> {code}
> +-----------+------------------------+--------------+-----------------+------------------------------------------+------------+----------------+---------+----------------------------+----------+
> | p_brand | p_comment | p_container | p_mfgr | p_name | p_partkey | p_retailprice | p_size | p_type | row_key |
> +-----------+------------------------+--------------+-----------------+------------------------------------------+------------+----------------+---------+----------------------------+----------+
> | Brand#13 | ly. slyly ironi | JUMBO PKG | Manufacturer#1 | goldenrod lace spring peru powder | 1 | 901.0 | 7 | PROMO BURNISHED COPPER | 1 |
> | Brand#13 | lar accounts amo | LG CASE | Manufacturer#1 | blush rosy metallic lemon navajo | 2 | 902.0 | 1 | LARGE BRUSHED BRASS | 2 |
> {code}
>
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