Hi Damith, If the "roles" field contains comma separated values, you can simply search for the specific role using the following query
"roles : role1" Lucene has an analysis process which takes place before indexing. So the field values will be tokenized into terms(Text fields are split removing special characters) , stop words.. etc. In your case, the whole string "role1, role2, role3" will be tokenized into "role1", "role2" and "role3". So you can perform a usual search query as I mentioned above. On Thu, Mar 24, 2016 at 11:35 AM, Damith Wickramasinghe <dami...@wso2.com> wrote: > Hi all, > > I have a column which contains roles as a comma separated string. eg:- > role1,role2,role3 > > I need to find records which matches to specific role. As I checked theres > no String contains function. But there is wildcard support[1]. To be able > to work for my usecase wildcard should be of type *role1*. But leading wild > cards are not supported. But as per the [2] Lucene 2.1, they can be > enabled by calling QueryParser.setAllowLeadingWildcard( true ). May I > know whether there is a configuration in DAS to enable this. Also even this > can be achieved I think this will be an expensive operation. If so is there > a best way to achieve this? eg:-custom UDF > > [1]http://www.lucenetutorial.com/lucene-query-syntax.html > [2]https://wiki.apache.org/lucene-java/LuceneFAQ > > Thanks, > Damith. > > -- > Software Engineer > WSO2 Inc.; http://wso2.com > <http://www.google.com/url?q=http%3A%2F%2Fwso2.com&sa=D&sntz=1&usg=AFQjCNEZvyc0uMD1HhBaEGCBxs6e9fBObg> > lean.enterprise.middleware > > mobile: *+94728671315 <%2B94728671315>* > > -- Gimantha Bandara Software Engineer WSO2. Inc : http://wso2.com Mobile : +94714961919
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