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From 郭士伟 <guoshi...@gmail.com>
Subject Re: Hive can I contribute to Hive confluence wiki documents?
Date Thu, 17 Jul 2014 15:06:47 GMT
Yes, I think.


2014-07-16 14:52 GMT+08:00 Lefty Leverenz <leftyleverenz@gmail.com>:

> 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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