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[HIVE-2206] add a new optimizer for query correlation discovery and optimization - Hive - [issue]
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...This issue proposes a new logical optimizer called Correlation Optimizer, which is used to merge correlated MapReduce jobs (MR jobs) into a single MR job. The idea is based on YSmart (http:/...
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http://issues.apache.org/jira/browse/HIVE-2206
Author: He Yongqiang,
2013-05-16, 19:39
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[HIVE-1953] Hive should process comments in CliDriver - Hive - [issue]
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...If you put commend before a set command, it will faile. Like this:– TestSerDe is a user defined serde where the default delimiter is Ctrl-B– the user is overwriting it with ctrlC...
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http://issues.apache.org/jira/browse/HIVE-1953
Author: He Yongqiang,
2013-04-09, 21:15
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[HIVE-1662] Add file pruning into Hive. - Hive - [issue]
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...now hive support filename virtual column. if a file name filter presents in a query, hive should be able to only add files which passed the filter to input paths....
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http://issues.apache.org/jira/browse/HIVE-1662
Author: He Yongqiang,
2013-03-15, 16:25
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[HIVE-1384] HiveServer should run as the user who submitted the query. - Hive - [issue]
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http://issues.apache.org/jira/browse/HIVE-1384
Author: He Yongqiang,
2013-02-09, 08:16
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[HIVE-1472] reduce the usage of HashMap and List.iterator. - Hive - [issue]
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...HashMap is used in a lot of places in Hive. Most times we can just replace it with native array. List.iterator() give a lot of pressure to Java GC, we should avoid it.Another thing we can al...
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http://issues.apache.org/jira/browse/HIVE-1472
Author: He Yongqiang,
2013-01-20, 15:11
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[HIVE-2101] mapjoin sometimes gives wrong results if there is a filter in the on condition - Hive - [issue]
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..."SELECT / * + mapjoin(src1, src2) * / * FROM src src1 RIGHT OUTER JOIN src src2 ON (src1.key = src2.key AND src1.key < 10 AND src2.key > 10) JOIN src src3 ON (src2.key = src3.key AND s...
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http://issues.apache.org/jira/browse/HIVE-2101
Author: He Yongqiang,
2012-12-19, 07:02
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[HIVE-2095] auto convert map join bug - Hive - [issue]
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...1) when considering to choose one table as the big table candidate for a map join, if at compile time, hive can find out that the total known size of all other tables excluding the big table...
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http://issues.apache.org/jira/browse/HIVE-2095
Author: He Yongqiang,
2012-11-12, 21:01
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[HIVE-1915] authorization on database level is broken. - Hive - [issue]
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...CREATE DATABASE IF NOT EXISTS test_db COMMENT 'Hive test database';SHOW DATABASES;grant `drop` on DATABASE test_db to user hive_test_user;grant `select` on DATABASE test_db to user hive_test...
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http://issues.apache.org/jira/browse/HIVE-1915
Author: He Yongqiang,
2012-10-10, 20:39
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[HIVE-2089] Add a new input format to be able to combine multiple .gz text files - Hive - [issue]
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...For files that is not splittable, CombineHiveInputFormat won't help. This jira is to add a new inputformat to support this feature. This is very useful for partitions with tens of thousands ...
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http://issues.apache.org/jira/browse/HIVE-2089
Author: He Yongqiang,
2012-09-28, 18:56
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[HIVE-352] Make Hive support column based storage - Hive - [issue]
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...column based storage has been proven a better storage layout for OLAP. Hive does a great job on raw row oriented storage. In this issue, we will enhance hive to support column based storage....
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http://issues.apache.org/jira/browse/HIVE-352
Author: He Yongqiang,
2012-08-14, 17:02
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