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Re: Lifecycle and Configuration of a hive UDF - Hive - [mail # user]
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...Have a read of the thread "Lag function in Hive", linked from: http://mail-archives.apache.org/mod_mbox/hive-user/201204.mbox/thread There's an example of how to force a function...
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Author: Philip Tromans,
2012-04-20, 17:54
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Re: nested UDFs on Partition column - Hive - [mail # user]
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...In fact, it's just not a reasonable thing to do partition pruning on. Imagine a situation where you had: WHERE partition_column = f(unix_timestamp()) AND ordinary_column f(unix_t...
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Author: Philip Tromans,
2012-04-19, 15:38
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Re: nested UDFs on Partition column - Hive - [mail # user]
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...I don't know what the state of Hive's partition pruning is, but I would imagine that the problem is that the two example you're giving are fundamentally different. 1) WHERE local_date ...
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Author: Philip Tromans,
2012-04-19, 15:35
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Re: Does Hive supports EXISTS keyword in select query? - Hive - [mail # user]
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...Hi, Hive supports EXISTS via SEMI JOIN. Have a look at: https://cwiki.apache.org/confluence/display/Hive/LanguageManual+Joins Cheers, Phil. On 11 April 2012 13:...
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Author: Philip Tromans,
2012-04-11, 13:02
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Re: Lag function in Hive - Hive - [mail # user]
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...I think you want something more like: SELECT t2.value - t1.value FROM mytable t1 JOIN mytable t2 ON (t1.rownum = t2.rownum + 1 AND t2.partition=bar) WHERE t1.partition=foo; This ...
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Author: Philip Tromans,
2012-04-10, 15:02
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Re: Lag function in Hive - Hive - [mail # user]
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...Hi Karan, To the best of my knowledge, there isn't one. It's also unlikely to happen because it's hard to parallelise in a map-reduce way (it requires knowing where you are in a result...
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Author: Philip Tromans,
2012-04-10, 14:17
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Re: Hive / Hadoop Log Retrieval Problem - Hive - [mail # dev]
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...I was just trying to build a patch for this, to submit against https://issues.apache.org/jira/browse/HIVE-1579 and it seems that the default hadoop build is 0.20.1, which has a different set...
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Author: Philip Tromans,
2012-04-02, 17:53
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Re: Error while reading from task log url - Hive - [mail # user]
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...You are running into: https://issues.apache.org/jira/browse/HIVE-1579 I've been meaning to submit a patch for this. I emailed the dev list concerning a patch for it but got no reply......
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Author: Philip Tromans,
2012-03-29, 16:56
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Re: Hive server concurrency question - Hive - [mail # user]
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...I've used Hive in a multiple connections per server instance setup. It works ok, but it is a little flakey. I have some snapshot of trunk > 0.8.0 deployed. When I have some time, I'd like...
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Author: Philip Tromans,
2012-03-28, 18:26
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Re: how to compute histogram on non-numeric data set? - Hive - [mail # user]
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...Is that not just a COUNT(1) and a GROUP BY? Phil. 2012/3/12 Richard :...
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Author: Philip Tromans,
2012-03-12, 12:36
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