Does Mondrian support nosql db like mongodb in the current version. I read some blogs and bugs related to the same.
Any help is appreciated.
thanks
Lokesh
please read the following Blog from Julian Hyde, creator of Mondrian
http://julianhyde.blogspot.com.es/2014/03/improvements-to-optiqs-mongodb-adapter.html
Here you can see Julian have been working on a new approach that converts even complex SQL queries into MongoDB Queries behind the scenes.
Mondrian does not directly support MongoDB at the moment. MongoDB does not have a JDBC implementation.
There are a few options. One of them can be setup if you have access to a Pentaho Data Integration server. You can use a thin JDBC implementation which will allow Mondrian to access a SQL to Mongo bridge.
There are certainly other ways to set this up, since there are a lot of data federation engines out there.
Not directly as far as I know. Maybe someone is working on a dialect, is that even possible..? Interesting question though... May be worth linking the blogs you found so far?
One solution however could be to use the kettle jdbc driver, this driver works with mondrian and then the other end can be any ETL process. So you could use a mongodb input step etc.
There is Apache Drill. You can query MongoDB through standard SQL and Drill has a JDBC driver. So maybe it is possible that Mondrian uses this driver.
Uwe
Related
Is there any hack || way in V-language default ORM to support MongoDB?
Currently, I'm able to connect PostgreSQL as it supports it as a default DB. This is just the RDBMS part, But what if we want to connect NoSQL?
Also, I'm not able to connect MySQL as well as other RDBMS databases. I'll also share my thoughts in the answer section(If I get some). If you got any hack / Ideas then please post it below. As this language is new and the community is growing, Your answer and thoughts will be helpful to others as well.
Since your answer, Vlang now has an official driver for MongoDB.
By now (dec 2020) there are no way to connect to a mongodb database, as of the page of the project on github. The support for other RDBMS is planned, but NoSQL databases have no plan to be added. But, if there are source code, there are a way todo, and maybe somebody can contribute adding this feature ;-).
Is there any java library to build sql queries based on pojos,
Like something similar to hibernate hql queries.
Object sql queries than translated to elastic search sql queries.
Current requirement is to send sql queries through rest apis.
There is jooq library whic can generate for many databases using dialects but currently it doesnt support for EsDriver which is elastic search jdbc driver.
Regards
Rajesh Giriyappa
I find your question a bit confusing. however, I'm gonna mention some facts that might help you.
First of all, elasticsearch is far away from a relational database system. It is a search engine implemented on top of Apache Lucene and stores semi-structured documents in its own data structure called index and it is used for Information Retrieval purposes. having said that, it is impossible to run SQL queries against elasticsearch because obviously it is not an RDBMS.
Furthermore, JPA is targeted only for providing solutions for working with RDBMSs so you can not connect to elasticsearch with JDBC, Hibernate etc.
If you want to connect to elasticsearch in a java application, you should use standard clients provided by elasticsearch itself.
https://www.elastic.co/guide/en/elasticsearch/client/java-rest/7.13/index.html
After seeing this image:
http://2.bp.blogspot.com/_T-uXeKcGTnM/TIdoKBGwk9I/AAAAAAAABcs/CLW3_cRlN78/s1600/tumblr_kxovt0VLZy1qappj8.png
I wonder is exists any tool for translating SQL querys into MongoDB map/reduce query model??
Larger version of the image: http://rickosborne.org/download/SQL-to-MongoDB.pdf
Update to the question asked in Jan 2011:
A couple of sites exist now to convert sql to mongodb.
Convert MySQL Queries to MongoDB Syntax
http://www.querymongo.com/
And
Convert sql to mongodb
http://klaus.dk/sqltomongodb/
The simple anwser? No.
The slightly more complex anwser is some people have had luck translating more complex SQL to Mapreduce functions ...
http://rickosborne.org/blog/index.php/2010/02/08/playing-around-with-mongodb-and-mapreduce-functions/
http://rickosborne.org/blog/index.php/2010/02/19/yes-virginia-thats-automated-sql-to-mongodb-mapreduce/
However, that said ... generally speaking you might as well learn mapreduce properly because if the data is in MongoDB already ... you'll really need to know how to properly query MongoDB to get anything meaningful done!
MongoDB has wonderful and helpful docs http://www.mongodb.org/display/DOCS/Advanced+Queries
As well as an easy to use online tutorial: http://try.mongodb.org/
The simple answer: Yes. Hibernate OGM - JPA for NoSQL.
JPA is Java API for mapping objects to data stores.
It includes JPQL, a query language similar to SQL which adds the OOP concepts. It's not SQL, but you don't want pure SQL - that was designed for the relational paradigm.
Hibernate OGM proposes to simplify the programming model by embracing JPA/Hibernate APIs and semantics to store data in NoSQL stores like JBoss Enterprise Data Grid instead of the traditional RDBMS. (source)
Also see this Hibernate OGM: JPA for NoSQL talk by Hardy Ferentschik
Recently I happened to see this website mongoquery.com, you can try it.
You can use free sql to mongodb converter like: https://rapidapi.com/ariefsam/api/easy-sql-to-mongodb-aggregation/
Just to add to the last comment
re:The simple answer: Yes. Hibernate OGM - JPA for NoSQL.
JPA is Java API for mapping objects to data stores.
It includes JPQL, a query language similar to SQL which adds the OOP concepts. It's not SQL, but you don't want pure SQL - that was designed for the relational paradigm.
There is a company called UnityJDBC that has released a JDBC driver for Mongo that allows you to run SQL queries against mongo in any java application that supports JDBC.
you can download this driver free at
http://www.unityjdbc.com/mongojdbc/mongo_jdbc.php
hope this helps
You can also http://teiid.org which gives full range of SQL based access to MongoDB. You can use SQL through JDBC/ODBC or use REST/ODATA based access to MongoDB. Teiid uses MongoDB's aggregation framework to provide advanced SQL MongoDB query conversation.
After seeing this image:
http://2.bp.blogspot.com/_T-uXeKcGTnM/TIdoKBGwk9I/AAAAAAAABcs/CLW3_cRlN78/s1600/tumblr_kxovt0VLZy1qappj8.png
I wonder is exists any tool for translating SQL querys into MongoDB map/reduce query model??
Larger version of the image: http://rickosborne.org/download/SQL-to-MongoDB.pdf
Update to the question asked in Jan 2011:
A couple of sites exist now to convert sql to mongodb.
Convert MySQL Queries to MongoDB Syntax
http://www.querymongo.com/
And
Convert sql to mongodb
http://klaus.dk/sqltomongodb/
The simple anwser? No.
The slightly more complex anwser is some people have had luck translating more complex SQL to Mapreduce functions ...
http://rickosborne.org/blog/index.php/2010/02/08/playing-around-with-mongodb-and-mapreduce-functions/
http://rickosborne.org/blog/index.php/2010/02/19/yes-virginia-thats-automated-sql-to-mongodb-mapreduce/
However, that said ... generally speaking you might as well learn mapreduce properly because if the data is in MongoDB already ... you'll really need to know how to properly query MongoDB to get anything meaningful done!
MongoDB has wonderful and helpful docs http://www.mongodb.org/display/DOCS/Advanced+Queries
As well as an easy to use online tutorial: http://try.mongodb.org/
The simple answer: Yes. Hibernate OGM - JPA for NoSQL.
JPA is Java API for mapping objects to data stores.
It includes JPQL, a query language similar to SQL which adds the OOP concepts. It's not SQL, but you don't want pure SQL - that was designed for the relational paradigm.
Hibernate OGM proposes to simplify the programming model by embracing JPA/Hibernate APIs and semantics to store data in NoSQL stores like JBoss Enterprise Data Grid instead of the traditional RDBMS. (source)
Also see this Hibernate OGM: JPA for NoSQL talk by Hardy Ferentschik
Recently I happened to see this website mongoquery.com, you can try it.
You can use free sql to mongodb converter like: https://rapidapi.com/ariefsam/api/easy-sql-to-mongodb-aggregation/
Just to add to the last comment
re:The simple answer: Yes. Hibernate OGM - JPA for NoSQL.
JPA is Java API for mapping objects to data stores.
It includes JPQL, a query language similar to SQL which adds the OOP concepts. It's not SQL, but you don't want pure SQL - that was designed for the relational paradigm.
There is a company called UnityJDBC that has released a JDBC driver for Mongo that allows you to run SQL queries against mongo in any java application that supports JDBC.
you can download this driver free at
http://www.unityjdbc.com/mongojdbc/mongo_jdbc.php
hope this helps
You can also http://teiid.org which gives full range of SQL based access to MongoDB. You can use SQL through JDBC/ODBC or use REST/ODATA based access to MongoDB. Teiid uses MongoDB's aggregation framework to provide advanced SQL MongoDB query conversation.
I am creating a quick and dirty prototype (C#) of an object-relational mapping tool. I would like to support at least two kinds of databases - one will be Microsoft SQL Server 2005/2008 and the other most probably MySQL.
Is there any way to use a single data base access mechanism for both database engines and what would it be?
Of course, I know that there will be differences in SQL query syntax, but in my case it is not that important - I'll use a tool to generate SQL queries which suit the certain db engine and user will be able to optimize those SQL queries.
The main idea is to have as flexible data provider solution as possible. Can it be done or not and how can it be done easier?
Note that I am not using this for a production system, just for a prototype, but still I'm curious how it is achieved in production OR/M tools - are they using completely separate access mechanism for each data provider or there are something common? And are they using DataReaders or there is some more appropriate way to retrieve data if I intend to transform data to business objects?
Thanks for any ideas, links etc.
Ok, I found it:
http://www.15seconds.com/issue/040127.htm
the solution is to use IDbxxx or Dbxxx as described in msdn.microsoft.com/en-us/library/ms379620(VS.80).aspx
Now I can specify only once what kind of DataProvider I use and then just use Db/IDb everywhere else.
I recommend nhibernate - which does what you want I think.
nhibernate.info