[jira] [Resolved] (PARQUET-918) FromParquetSchema API crashes on nested schemas

["Wes McKinney (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PARQUET-918?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wes McKinney resolved PARQUET-918.
----------------------------------
       Resolution: Fixed
    Fix Version/s: cpp-1.1.0

Issue resolved by pull request 295
[https://github.com/apache/parquet-cpp/pull/295]

> FromParquetSchema API crashes on nested schemas
> -----------------------------------------------
>
>                 Key: PARQUET-918
>                 URL: https://issues.apache.org/jira/browse/PARQUET-918
>             Project: Parquet
>          Issue Type: Bug
>          Components: parquet-cpp
>    Affects Versions: cpp-1.0.0
>            Reporter: Itai Incze
>             Fix For: cpp-1.1.0
>
>
> {{FromParquetSchema@src/parquet/arrow/schema.cc:276}} misbehaves by using its column_indices parameter in the second version of the function as indices to the direct schema root fields. 
> This is problematic with nested schema parquet files - the bug crashes the process by accessing the fields vector out of bounds.
> This bug is masked by another bug in the first version of the {{FromParquetSchema}} function which constructs a complete indices list the size of the number of schema fields (instead of the # of columns).
> The bug is triggered in many significant use-cases, for example when using the {{arrow::ReadTable}} API.



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