Prasanth Jayachandran created ORC-135:
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Summary: PPD for timestamp is wrong when reader and writer
timezones are different
Key: ORC-135
URL: https://issues.apache.org/jira/browse/ORC-135
Project: Orc
Issue Type: Bug
Affects Versions: 1.3.0, 1.2.0, 1.1.0, 1.0.0
Reporter: Prasanth Jayachandran
Assignee: Prasanth Jayachandran
Priority: Critical
When reader and writer timezones are different, PPD evaluation does not offset
the timezone when reading the min and max values. This can result is wrong PPD
evaluation and hence incorrect results.
Example:
Table written in US/Eastern timezone. All values in this table are "2007-08-01
00:00:00.0".
{code:title=PPD disabled}
hive> set hive.optimize.index.filter=false;
hive> select ORDER_DATE from ORDER_FACT_small where ORDER_DATE='2007-08-01
00:00:00.0' limit 1;
2007-08-01 00:00:00.0
OK
{code}
{code:title=PPD enabled}
set hive.optimize.index.filter=true;
select ORDER_DATE from ORDER_FACT_small where ORDER_DATE='2007-08-01
00:00:00.0' limit 1;
OK
{code}
No rows are returned when PPD is enabled.
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