Marc Vertes created PARQUET-895:
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Summary: Reading of nested columns is broken
Key: PARQUET-895
URL: https://issues.apache.org/jira/browse/PARQUET-895
Project: Parquet
Issue Type: Bug
Components: parquet-cpp
Reporter: Marc Vertes
Problem occurs when reading a nested column with repeated values, specially
when there is much more levels in that column than the number of global rows.
Citing @peshopetrov, who filed a github pull request identifying the problem
and proposing a fix:
Nested repeated columns' count is incorrectly read from row group's metadata.
That's correct in cases where there aren't any nested repeated fields but is
generally not correct. Instead the num_values from the column's metadata should
be used.
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