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[PIG-2784] Framework for dynamic query optimization - Pig - [issue]
...We need a framework to implement dynamic query optimization, i.e. changing the query plan at runtime. Currently we support estimating the number of reducers dynamically, which works well as ...
http://issues.apache.org/jira/browse/PIG-2784    Author: Jie Li, 2014-05-12, 19:17
[PIG-2736] Support implicit cast from bytearray to boolean - Pig - [issue]
...a = load 'allscalar10k' as (name, age, gpa, instate);b = filter a by instate==TRUE;dump b; Error:In alias b, incompatible types in Equal Operator left hand side:bytearray right hand side:bo...
http://issues.apache.org/jira/browse/PIG-2736    Author: Jie Li, 2013-02-22, 04:54
[PIG-2661] Pig uses an extra job for loading data in Pigmix L9 - Pig - [issue]
...See https://issues.apache.org/jira/browse/PIG-200?focusedCommentId=13260155&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13260155...
http://issues.apache.org/jira/browse/PIG-2661    Author: Jie Li, 2013-02-04, 17:43
[PIG-2824] Pushing checking number of fields into LoadFunc - Pig - [issue]
...As described in PIG-1188, if users define a schema (w or w/o types), we need to check the number of fields after loading data, so if there are less fields we need to pad null fields, and if ...
http://issues.apache.org/jira/browse/PIG-2824    Author: Jie Li, 2013-01-12, 12:24
[PIG-2397] Running TPC-H Benchmark on Pig - Pig - [issue]
...For a class project we developed a whole set of Pig scripts for TPC-H. Our goals are:1) identifying the bottlenecks of Pig's performance especially of its relational operators,2) studying ho...
http://issues.apache.org/jira/browse/PIG-2397    Author: Jie Li, 2012-12-08, 05:44
[PIG-2829] Use partial aggregation more aggresively - Pig - [issue]
...Partial aggregation (Hash Aggregation, aka in-map combiner) is a new feature in Pig 0.10 that will perform aggregation within map function. The main advantage against combiner is it avoids d...
http://issues.apache.org/jira/browse/PIG-2829    Author: Jie Li, 2012-09-06, 06:08
[PIG-2902] Pig defaults numeric types to integer instead of double - Pig - [issue]
...This was observed in PIG-2835, where Pig defaults the type used in SUM() as integer while it's actually double, thus parsing each number to integer would throw an exception. PIG-2835 replace...
http://issues.apache.org/jira/browse/PIG-2902    Author: Jie Li, 2012-09-03, 00:23
[PIG-2835] Optimizing the convertion from bytes to Integer/Long - Pig - [issue]
...Currently Pig doesn't support lazy see/de, so as one of the best practices, we recommend users not to declare types in the schema so that Pig will guess the right types and cast them lazily....
http://issues.apache.org/jira/browse/PIG-2835    Author: Jie Li, 2012-09-03, 00:08
[PIG-2779] Refactoring the code for setting number of reducers - Pig - [issue]
...As PIG-2652 observed, currently the code for setting number of reducers is a little messy. MapReduceOper.requestedParallelism seems being misused in some plases, and now we support runtime e...
http://issues.apache.org/jira/browse/PIG-2779    Author: Jie Li, 2012-07-31, 17:36
[PIG-2772] Convert the skew join to the normal join for small dataset - Pig - [issue]
...Similar to PIG-483 that we want to avoid the unnecessary sampling job for small dataset.Any easy way to do the runtime conversion?...
http://issues.apache.org/jira/browse/PIG-2772    Author: Jie Li, 2012-07-30, 20:18
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