[jira] [Created] (ARROW-11452) [Rust] Parquet reader cannot read file where a struct column has the same name as struct member columns

["Max Burke (Jira)" <ji...@apache.org>]

Max Burke created ARROW-11452:
---------------------------------

             Summary: [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
         Attachments: structs.parquet

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]



--
This message was sent by Atlassian Jira
(v8.3.4#803005)