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Re: Review Request 27401: HIVE-8636 CBO: split cbo_correctness test - Hive - [mail # dev]
...This is an automatically generated e-mail. To reply, visit:https://reviews.apache.org/r/27401/#review59288data/scripts/q_test_init.sql    if exists misseddata/scripts/q_test_i...
   Author: Ashutosh Chauhan, 2014-10-31, 00:42
[HIVE-8585] Constant folding should happen before ppd - Hive - [issue]
...will help NullScanOptimizer to kick in more places....
http://issues.apache.org/jira/browse/HIVE-8585    Author: Ashutosh Chauhan, 2014-10-29, 18:12
[HIVE-8435] Add identity project remover optimization - Hive - [issue]
...In some cases there is an identity project in plan which is useless. Better to optimize it away to avoid evaluating it without any benefit at runtime....
http://issues.apache.org/jira/browse/HIVE-8435    Author: Ashutosh Chauhan, 2014-10-29, 16:15
Re: Review Request 27318: HIVE-8625: Some union queries result in plans with many unions with CBO on - Hive - [mail # dev]
...This is an automatically generated e-mail. To reply, visit:https://reviews.apache.org/r/27318/#review58992Ship it!Ship It!- Ashutosh ChauhanOn Oct. 29, 2014, 4:06 a.m., Jesús Camacho Rodrígu...
   Author: Ashutosh Chauhan, 2014-10-29, 15:34
[HIVE-8555] Too many casts results in loss of original string representation for constant - Hive - [issue]
...SELECT key, value FROM src WHERE key = cast(86 as double);86.0  val_86With constant propagate off we get different and correct result.set hive.optimize.constant.propagation=false;SELECT...
http://issues.apache.org/jira/browse/HIVE-8555    Author: Ashutosh Chauhan, 2014-10-23, 02:48
[HIVE-8531] Fold is not null filter if there are other comparison filter present on same column - Hive - [issue]
...e.g., select * from src where key = '86' and key is not null;is equivalent toselect * from src where key = '86';we can short circuit is not null filter and avoid its evaluation for every row...
http://issues.apache.org/jira/browse/HIVE-8531    Author: Ashutosh Chauhan, 2014-10-22, 21:21
[HIVE-8490] Constant folding should happen before partition pruning - Hive - [issue]
...so that partition pruning see simplified expressions and present simpler expressions to metastore...
http://issues.apache.org/jira/browse/HIVE-8490    Author: Ashutosh Chauhan, 2014-10-22, 21:17
[HIVE-8492] Enhance Constant Folding to propagate constants for simple expressions - Hive - [issue]
...currently it propagates only for projects, can be enhanced to propagate for simple expressions like casts, e.g,SELECT src1.key, src1.key + 1, src2.value FROM src src1 join src src2 ON src1.k...
http://issues.apache.org/jira/browse/HIVE-8492    Author: Ashutosh Chauhan, 2014-10-19, 02:32
[HIVE-8460] ORC SARG literal creation for double from float may lead to wrong evaluation of SARG - Hive - [issue]
...e.g., expression like d = 0.22 where 0.22 is of float type, gets converted to double d = 0.219999986 in SARG creation. This will cause erroneous evaluation of SARG expression....
http://issues.apache.org/jira/browse/HIVE-8460    Author: Ashutosh Chauhan, 2014-10-17, 16:35
[HIVE-8428] PCR doesnt remove filters involving casts - Hive - [issue]
...e.g.,select key,value from srcpart where hr = cast(11 as double);...
http://issues.apache.org/jira/browse/HIVE-8428    Author: Ashutosh Chauhan, 2014-10-17, 16:34
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