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 <leftylever...@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 <guoshi...@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. >> > >
