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[HIVE-1003] optimize metadata only queries
...Queries like:select max(ds) from T where ds is a partitioning column should be optimized....
, 2012-09-28, 23:50
[HIVE-3507] Some of the tests are not deterministic
...skewjoinopt* tests are not deterministic...
, 2012-09-26, 14:24
[HIVE-3502] design efficient bucketing techniques
...Currently, the bucketing techniques are fairly expensive - The bucketing keys have to be the same as the reduction keys and the process of bucketization requiresa fully blown map-reduce job....
, 2012-09-25, 04:44
[HIVE-2847] Add support for query rewrite from the metadata
...A simple query like: select count(1) from Tshould be able to get the results from the metadata instead of scanning the complete input table T.2. the metadata only queries today does not scal...
, 2012-09-23, 16:36
[HIVE-3477] Duplicate data possible with speculative execution for dynamic partitions
...Consider a query like:insert overwrite T partition (ds)select * from(mapreduce-subq1 union allmapreduce-subq2)x;Once, mapreduce-subq1 and mapreduce-subq2 are done, the task for the uni...
, 2012-09-20, 02:03
[HIVE-3476] Change bucketGroup in GroupByDesc to noHash
...That's what the variable is doing.The problem with such a change is that it will change ~200 test output files....
, 2012-09-18, 05:11
[HIVE-3283] bucket information should be used from the partition instead of the table
...Currently Hive uses the number of buckets from the table object.Ideally, the number of buckets from the partition should be used...
, 2012-09-15, 23:24
[HIVE-2595] add a table level property which does not let the table or any of its partitions to be dropped
...The current approach:alter table <TBL> enable no_drop;does not prevent the partitions from being dropped.This new property should prevent both the table and any of its partitions (curr...
, 2012-09-14, 19:24
[HIVE-3438] Add tests for 'm' bigs tables sortmerge join with 'n' small tables where both m,n>1
...Once https://issues.apache.org/jira/browse/HIVE-3171 is in, it would be good to add more tests which tests the above condition....
, 2012-09-14, 08:13
[HIVE-3462] bucketcontext_5.q.out missing from results
...This should have been checked in as part of HIVE-3171, but somehow missed.The tests are failing due to this....
, 2012-09-14, 05:26
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