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https://issues.apache.org/jira/browse/IMPALA-2125?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Csaba Ringhofer closed IMPALA-2125.
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Resolution: Duplicate
> Improve perf when reading timestamps from parquet files written by hive
> -----------------------------------------------------------------------
>
> Key: IMPALA-2125
> URL: https://issues.apache.org/jira/browse/IMPALA-2125
> Project: IMPALA
> Issue Type: Improvement
> Components: Backend
> Affects Versions: Impala 2.2
> Reporter: casey
> Priority: Minor
>
> This is for tracking purposes. The improvement is already committed --
> 29de99c9d25c49b73488d2f75bc3644ae9ff9325.
> When using the flag -convert_legacy_hive_parquet_utc_timestamps=true,
> depending on the query the runtime may be 10x longer (possibly more). The
> commit above inlines some function calls which improves the 10x case to 5x.
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