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From Lefty Leverenz <leftylever...@gmail.com>
Subject Re: Hive can I contribute to Hive confluence wiki documents?
Date Wed, 16 Jul 2014 06:52:49 GMT
HIVE-7314 is documented in the Configuration Properties wiki (
hive.cache.expr.evaluation
<https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-hive.cache.expr.evaluation>)
and at the beginning of the Operators and UDFs
<https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF> wiki.
 The latter includes a link to this email thread.

Does that take care of it?

-- Lefty


On Sun, Jul 13, 2014 at 3:57 AM, Navis류승우 <navis.ryu@nexr.com> wrote:

> For "cache.expr.evaluation" problem, it's fixed in
> https://issues.apache.org/jira/browse/HIVE-7314 (will be included in next
> release)
>
> But I agree that it can be a critical problem for users of 0.12.0 and
> 0.13.x version and need proper warning on that.
>
> Thanks,
> Navis
>
>
> 2014-07-13 16:48 GMT+09:00 郭士伟 <guoshiwei@gmail.com>:
>
> And I haven't add other information in the wikidoc yet.
>>
>>
>> 2014-07-04 14:37 GMT+08:00 Lefty Leverenz <leftyleverenz@gmail.com>:
>>
>>> The 'hive.cache.expr.evaluation' parameter is documented in the wikidoc Configuration
>>> Properties
>>> <https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-hive.cache.expr.evaluation>.
>>>  Have you added other information in a different wikidoc?  If so, I'll link
>>> the docs to each other.
>>>
>>> -- Lefty
>>>
>>>
>>> On Thu, May 29, 2014 at 5:31 AM, Lefty Leverenz <leftyleverenz@gmail.com
>>> > wrote:
>>>
>>>> Thank you for pointing this out.  The 'hive.cache.expr.evaluation'
>>>> parameter was added by HIVE-4209
>>>> <https://issues.apache.org/jira/browse/HIVE-4209> and it needs to be
>>>> included in the wiki.  Its description is in hive-default.xml.template:
>>>>
>>>> If true, evaluation result of deterministic expression referenced twice
>>>>> or more will be cached. For example, in filter condition like ".. where
key
>>>>> + 10 > 10 or key + 10 = 0" "key + 10" will be evaluated/cached once
and
>>>>> reused for following expression ("key + 10 = 0"). Currently, this is
>>>>> applied only to expressions in select or filter operator.
>>>>
>>>>
>>>> Do you want to provide more information than that?  To contribute to
>>>> the wiki, create a Confluence account
>>>> <https://cwiki.apache.org/confluence/signup.action> and send a message
>>>> to this list asking for wiki editing privilege and giving your account
>>>> name.  But if you just want the description to be added to the wiki, I can
>>>> take care of that.
>>>>
>>>> If you have additional information, it might not belong in Configuration
>>>> Properties
>>>> <https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties>
(although
>>>> once the parameter is there it can link to another page for details).  The
>>>> Select
>>>> <https://cwiki.apache.org/confluence/display/Hive/LanguageManual+Select>
>>>> page is one possibility, or maybe you'll find a better place for it.
>>>>
>>>> If you want to revise the description in hive-default.xml.template, you
>>>> need to open a JIRA and patch the file.
>>>>
>>>>
>>>> -- Lefty
>>>>
>>>>
>>>> On Sat, May 24, 2014 at 1:01 AM, 郭士伟 <guoshiwei@gmail.com> wrote:
>>>>
>>>>> I have used a configuration property 'hive.cache.expr.evaluation' in
>>>>> hive 0.12 recently and found it useful. But I cannot find any documents
>>>>> about it on the wiki page:
>>>>> https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties.
>>>>> Indeed, I pick it up from the source code.
>>>>>
>>>>> I think it maybe useful for other hive users if I can write some
>>>>> documents about the property.
>>>>>
>>>>> So, can anyone give me some pointers that how can I make the change
>>>>> happen ?
>>>>>
>>>>> Thanks, anyway.
>>>>>
>>>>
>>>>
>>>
>>
>

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