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https://issues.apache.org/jira/browse/HIVE-14815?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ferdinand Xu updated HIVE-14815:
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Description: Parquet doesn't provide a vectorized reader which can be used
by Hive directly. Also for Decimal Column batch, it consists of a batch of
HiveDecimal which is a Hive type which is unknown for Parquet. To support Hive
vectorization execution engine in Hive, we have to implement the vectorized
Parquet reader in Hive side. To limit the performance impacts, we need to
implement a page level vectorized reader.
> Support vectorization for Parquet
> ---------------------------------
>
> Key: HIVE-14815
> URL: https://issues.apache.org/jira/browse/HIVE-14815
> Project: Hive
> Issue Type: Bug
> Reporter: Ferdinand Xu
> Assignee: Ferdinand Xu
>
> Parquet doesn't provide a vectorized reader which can be used by Hive
> directly. Also for Decimal Column batch, it consists of a batch of
> HiveDecimal which is a Hive type which is unknown for Parquet. To support
> Hive vectorization execution engine in Hive, we have to implement the
> vectorized Parquet reader in Hive side. To limit the performance impacts, we
> need to implement a page level vectorized reader.
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