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 Post subject: Hibernate OGM complex queries
PostPosted: Wed Feb 01, 2017 1:01 pm 
Newbie

Joined: Wed Feb 01, 2017 12:53 pm
Posts: 1
Hello guys,

I've been trying to execute some native map reduce against Monto using Hibernate, but I'm experiencing some difficulties :) what I tried so far :

I tried this query :

Code:
"{ query: { db.article.mapReduce(function() {var key = this.instrument_code;emit(key, this);},function(key, values) {values.sort(function(valueA, valueB){if(valueA.display_datetime < valueB.display_datetime){return 1;}else if(valueA.display_datetime == valueB.display_datetime){return 0;}else{return -1;}}); return values[0] }, { query: { 'instrument_code': { $in: ['EUR', 'JPY', 'GBP', 'DJI', 'CL1', 'GOLDS'] }, 'analysis_type': 'TA' }, out: 'articles'}).find() } }"

and this one

Code:
"db.article.mapReduce(function() {var key = this.instrument_code;emit(key, this);},function(key, values) {values.sort(function(valueA, valueB){if(valueA.display_datetime < valueB.display_datetime){return 1;}else if(valueA.display_datetime == valueB.display_datetime){return 0;}else{return -1;}}); return values[0] }, { query: { 'instrument_code': { $in: ['EUR', 'JPY', 'GBP', 'DJI', 'CL1', 'GOLDS'] }, 'analysis_type': 'TA' }, out: 'articles'}).find()"

both, as native query

Code:
em.createNativeQuery(queryString, Article.class)


but looks like I'm doing something wrong here, does anyone have a hint?

Thank you!!


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 Post subject: Re: Hibernate OGM complex queries
PostPosted: Fri Feb 03, 2017 4:22 am 
Hibernate Team
Hibernate Team

Joined: Fri Sep 09, 2011 3:18 am
Posts: 294
Hi,
Hibernate OGM does not currently support map-reduce queries at the moment.
You can find a list of the supported queries in the documentation: https://docs.jboss.org/hibernate/ogm/5. ... cli-syntax

Aggregate will be supported in the next release.


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