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https://issues.apache.org/jira/browse/HIVE-23036?focusedWorklogId=548236&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-548236
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ASF GitHub Bot logged work on HIVE-23036:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 05/Feb/21 09:58
Start Date: 05/Feb/21 09:58
Worklog Time Spent: 10m
Work Description: pgaref opened a new pull request #1943:
URL: https://github.com/apache/hive/pull/1943
### What changes were proposed in this pull request?
Timestamp PPD Test with nanosecond precision
### Why are the changes needed?
Nanosecond precision timestamps where not supported prior to ORC-1.6 thus we
need to add some tests
### Does this PR introduce _any_ user-facing change?
Np
### How was this patch tested?
orc_ppd_timestamp_precision.q
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Issue Time Tracking
-------------------
Worklog Id: (was: 548236)
Time Spent: 50m (was: 40m)
> ORC PPD eval with sub-millisecond timestamps
> --------------------------------------------
>
> Key: HIVE-23036
> URL: https://issues.apache.org/jira/browse/HIVE-23036
> Project: Hive
> Issue Type: Sub-task
> Reporter: Panagiotis Garefalakis
> Assignee: Panagiotis Garefalakis
> Priority: Major
> Labels: pull-request-available
> Time Spent: 50m
> Remaining Estimate: 0h
>
> See [ORC-611|https://issues.apache.org/jira/browse/ORC-611] for more details
> ORC stores timestamps with:
> - nanosecond precision for the data itself
> - milliseconds precision for min-max statistics
> As both min and max are rounded to the same value, timestamps with ns
> precision will not pass the PPD evaluator.
> {code:java}
> create table tsstat (ts timestamp) stored as orc;
> insert into tsstat values ("1970-01-01 00:00:00.0005");
> select * from tsstat where ts = "1970-01-01 00:00:00.0005";
> -- returned 0 rows{code}
> ORC PPD evaluation currently happens as part of OrcInputFormat
> [https://github.com/apache/hive/blob/7e39a2c13711f9377c9ce1edb4224880421b1ea5/ql/src/java/org/apache/hadoop/hive/ql/io/orc/OrcInputFormat.java#L2314]
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