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[HIVE-7822] how to merge two  hive metastores' metadata  stored in different databases (such as mysql) - Hive - [issue]
...Hi, What is a good way to merge  two hive metadata stored in different databases(such as mysql)?Is there any way to get all history Hqls  from metastore?  I think  I need...
http://issues.apache.org/jira/browse/HIVE-7822    Author: wangmeng, 2014-08-21, 03:55
[HIVE-7469] skew join keys  when  two join  table  have the same big skew key - Hive - [issue]
...In https://issues.apache.org/jira/browse/HIVE-964, I  have a  general   idea about how to  deal with skew join key , the key  point is that  use mapjoin to deal...
http://issues.apache.org/jira/browse/HIVE-7469    Author: wangmeng, 2014-07-22, 09:34
[HIVE-7296] big data approximate processing  at a very  low cost  based on hive sql - Hive - [issue]
...For big data analysis, we often need to do the following query and statistics´╝Ü1.Cardinality Estimation,   count the number of different elements in the collection, such as Unique Visito...
http://issues.apache.org/jira/browse/HIVE-7296    Author: wangmeng, 2014-07-05, 12:07
[HIVE-7277] how to decide reduce numbers   according  to  the input size of reduce stage rather than the  input size of  map stage? - Hive - [issue]
...As we  know ,now  hive decide the  reduce numbers  just by  the " Input size of   map/ hive.exec.reducers.bytes.per.reducer(default 1G ).....But ,I  think ...
http://issues.apache.org/jira/browse/HIVE-7277    Author: wangmeng, 2014-06-24, 07:29
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