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[IMPALA-7568] Implement timezone aware parquet stat filtering for timestamp columns - Impala - [issue]
...Parquet timestamp columns can contain UTC normalized data, which means that the data is stored in UTC but it is expected to be shown  in local time (to be consistent with Hive). This is...
http://issues.apache.org/jira/browse/IMPALA-7568    Author: Csaba Ringhofer , 2018-10-11, 19:09
[IMPALA-7359] Make local timezone deterministic during tests - Impala - [issue]
...Currently Impala uses the timezone of the machine where impalad runs for local<-> utc time conversions. This makes it hard to test these functions, as they give different results depen...
http://issues.apache.org/jira/browse/IMPALA-7359    Author: Csaba Ringhofer , 2018-10-05, 13:50
[IMPALA-7521] CLONE - Speed up sub-second unix time->TimestampValue conversions - Impala - [issue]
...Currently Impala converts from sub-second unix time to TimestampValue (which is split do date_ and time_ similarly to boost::posix_time::ptime ) by first splitting the input into seconds and...
http://issues.apache.org/jira/browse/IMPALA-7521    Author: Csaba Ringhofer , 2018-10-05, 07:27
[IMPALA-7485] test_spilling_naaj hung on jenkins - Impala - [issue]
...query_test/test_spilling.py::TestSpillingDebugActionDimensions::test_spilling_naaj[exec_option: {'debug_action': None, 'default_spillable_buffer_size': '256k'} | table_format: parquet/none] ...
http://issues.apache.org/jira/browse/IMPALA-7485    Author: Csaba Ringhofer , 2018-09-27, 01:54
[IMPALA-7362] Add query option to set timezone - Impala - [issue]
...Hive has "set time zone" command to set the timezone used for utc<->local time conversions during a session (HIVE-16614). A similar command could be useful in Impala, at least for test...
http://issues.apache.org/jira/browse/IMPALA-7362    Author: Csaba Ringhofer , 2018-09-25, 19:44
[IMPALA-6658] Parquet RLE encoding can waste space with small repeated runs - Impala - [issue]
...Currently RleEncoder creates repeated runs from 8 repeated values, which can be less space efficient than bit-packed if bit width is 1 or 2. In the worst case, the whole data page can be ~2X...
http://issues.apache.org/jira/browse/IMPALA-6658    Author: Csaba Ringhofer , 2018-09-14, 23:33
[IMPALA-7559] Parquet stat filtering ignores convert_legacy_hive_parquet_utc_timestamps - Impala - [issue]
...UPDATE: the issue turned out to be different than I first thought, see my last comment. I will update the description with more details later.If the min/max value of a timestamp column chunk...
http://issues.apache.org/jira/browse/IMPALA-7559    Author: Csaba Ringhofer , 2018-09-14, 16:09
[IMPALA-7567] Implement timezone aware parquet stat filtering for timestamp columns - Impala - [issue]
...Parquet timestamp columns can contain UTC normalized data, which means that the data is stored in UTC but it is expected to be shown  in local time (to be consistent with Hive). This is...
http://issues.apache.org/jira/browse/IMPALA-7567    Author: Csaba Ringhofer , 2018-09-13, 14:33
[IMPALA-7558] Optimize AddInterval timezone functions similarly to IMPALA-7521 - Impala - [issue]
...Currently AddInterval functions use boost's ptime and duration classes + there is a lot wrapper code to avoid exceptions caused by out of range timestamps and overflows caused by large inter...
http://issues.apache.org/jira/browse/IMPALA-7558    Author: Csaba Ringhofer , 2018-09-11, 12:57
[IMPALA-7557] Optimize local time functions for the UTC case - Impala - [issue]
...Currently two flags decide whether to do UTZ->local timezone conversions convert_legacy_hive_parquet_utc_timestamps use_local_tz_for_unix_timestamp_conversionsEnabling these global flags ...
http://issues.apache.org/jira/browse/IMPALA-7557    Author: Csaba Ringhofer , 2018-09-11, 12:41