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Posted to issues@drill.apache.org by "Jan Soubusta (Jira)" <ji...@apache.org> on 2020/10/27 18:53:00 UTC

[jira] [Created] (DRILL-7797) Decimals are wrongly read from parquet files

Jan Soubusta created DRILL-7797:
-----------------------------------

             Summary: Decimals are wrongly read from parquet files
                 Key: DRILL-7797
                 URL: https://issues.apache.org/jira/browse/DRILL-7797
             Project: Apache Drill
          Issue Type: Bug
          Components: Storage - Parquet
    Affects Versions: 1.18.0
            Reporter: Jan Soubusta


My setup:
Docker embedded Drill 1.18 (latest).

Parquet decimals are wrongly read by Drill, wrong huge / negative values are displayed.

Example small public file: 
[https://gdc-tiger-test-data-eu-central.s3.eu-central-1.amazonaws.com/other_files/tpch/supplier.parquet/a51ab8fd-v_verticadb_node0001-140644911675136-0.parquet]

The file was exported from Vertica database using EXPORT TO PARQUET statement.
My colleague utilizes his parquet reader written in C++ and this is his comment:
{quote}
6th column S_ACCTBAL has type FIXED_LEN_BYTE_ARRAY and convertedType DECIMAL with scale 2 and precision 15.
I would say, that it is correctly conforming specification.
{quote}

 



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