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https://issues.apache.org/jira/browse/PARQUET-780?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15688634#comment-15688634
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Mike Trinkala commented on PARQUET-780:
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The definition level is an array of size 1 with a value of 1 (which is the max
definition level in this case) So if I am reading this correctly it will cause
values_to_write to be incremented and a write will be attempted using the NULL
array.
> WriterBatch API does not properly handle NULL values for byte array types
> -------------------------------------------------------------------------
>
> Key: PARQUET-780
> URL: https://issues.apache.org/jira/browse/PARQUET-780
> Project: Parquet
> Issue Type: Bug
> Components: parquet-cpp
> Affects Versions: cpp-0.1
> Reporter: Mike Trinkala
>
> Passing a NULL 'values' parameter into WriteBatch for a *ByteArray type will
> cause a segfault in the dictionary encoder.
> Related: https://issues.apache.org/jira/browse/PARQUET-719
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