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Posted to jira@arrow.apache.org by "Neville Dipale (Jira)" <ji...@apache.org> on 2021/02/24 13:31:00 UTC
[jira] [Resolved] (ARROW-11452) [Rust] Parquet reader cannot read
file where a struct column has the same name as struct member columns
[ https://issues.apache.org/jira/browse/ARROW-11452?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Neville Dipale resolved ARROW-11452.
------------------------------------
Fix Version/s: 4.0.0
Resolution: Fixed
Issue resolved by pull request 9390
[https://github.com/apache/arrow/pull/9390]
> [Rust] Parquet reader cannot read file where a struct column has the same name as struct member columns
> --------------------------------------------------------------------------------------------------------
>
> Key: ARROW-11452
> URL: https://issues.apache.org/jira/browse/ARROW-11452
> Project: Apache Arrow
> Issue Type: Bug
> Reporter: Max Burke
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
> Attachments: structs.parquet
>
> Time Spent: 2h
> Remaining Estimate: 0h
>
> For example, given the schema:
>
> count: struct<min: int64 not null, max: int64 not null, mean: int64 not null, count: uint64 not null, sum: int64 not null, variance: int64 not null> not null
> child 0, min: int64 not null
> child 1, max: int64 not null
> child 2, mean: int64 not null
> child 3, count: uint64 not null
> child 4, sum: int64 not null
> child 5, variance: int64 not null
> ul_observation_date: struct<min: timestamp[us] not null, max: timestamp[us] not null, mean: timestamp[us] not null, count: uint64 not null, sum: timestamp[us] not null, variance: timestamp[us] not null> not null
> child 0, min: timestamp[us] not null
> child 1, max: timestamp[us] not null
> child 2, mean: timestamp[us] not null
> child 3, count: uint64 not null
> child 4, sum: timestamp[us] not null
> child 5, variance: timestamp[us] not null
>
> The array reader performs dictionary lookups for the type of columns of types such as ul_observation_date, but when it looks up the field `count` it gets the definition not of the ul_observation_date.count field but of the `count` struct.
>
> Attached is a sample file that exhibits this behavior.
>
> [^structs.parquet]
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