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From "Cao Manh Dat (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-11244) Query DSL for Solr
Date Fri, 18 Aug 2017 15:48:00 GMT

    [ https://issues.apache.org/jira/browse/SOLR-11244?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16133155#comment-16133155
] 

Cao Manh Dat commented on SOLR-11244:
-------------------------------------

Hi [~yseeley@gmail.com], SOLR-4351 seems have the same approach with my first attempt for
this issue, but as you may know, this require remarkable change in current QParser classes.


{quote}
One reason I was thinking of changing QParsers to act on Object graphs instead of Strings
is because local params can't represent everything that JSON can
{quote}
In fact, after the first attempt, I think local params are powerful enough for represent everything
that query DSL need. It support nested queries and parameters for each queries, that's all
I need. For example
{code}
curl -XGET http://localhost:8983/solr/query -d '
{
  "query": { 
    "bool": { 
      "must": [
        "title:solr", 
        { "lucene" : {"df": "content", query : "lucene solr" }  }
      ],
      "must_not": "{!frange u=3.0}ranking"
    }
  }
}
{code}

Can be rewritten as
{code}
{!bool must='title:solr' must='{!lucene df=content v=lucene solr }' must_not='{!frange u=3.0}ranking'}
{code}

> Query DSL for Solr
> ------------------
>
>                 Key: SOLR-11244
>                 URL: https://issues.apache.org/jira/browse/SOLR-11244
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Cao Manh Dat
>            Assignee: Cao Manh Dat
>         Attachments: SOLR-11244.patch, Solr Query DSL - examples.html
>
>
> It will be great if Solr has a powerful query DSL. This ticket is an extension of [http://yonik.com/solr-json-request-api/].
> Here are several examples of Query DSL
> {code}
> curl -XGET http://localhost:8983/solr/query -d '
> {
>     "query" : {
>         "lucene" : {
>             "df" : "content",
>             "query" : "solr lucene"
>         }
>     }
> }
> {code}
> the above example can be rewritten as (because lucene is the default qparser)
> {code}
> curl -XGET http://localhost:8983/solr/query -d '
> {
>     "query" : "content:(solr lucene)"
> }
> {code}
> more complex example:
> {code}
> curl -XGET http://localhost:8983/solr/query -d '
> { 
>     "query" : {
>         "boost" : {
>             "query" : {
>                 "lucene" : {
>                     "q.op" : "AND",
>                     "df" : "cat_s",
>                     "query" : "A"
>                 }
>             }
>             "b" : "log(popularity)"
>         }
>     }
> }
> {code}
> I call it Json Query Object (JQO) and It defined as :
> - It can be a valid query string for Lucene query parser, for example : "title:solr"
> - It can be a valid local parameters string, for example : "{!dismax qf=myfield}solr
rocks"
> - It can be a json object with structure like this 
> {code}
> {
>   "query-parser-name" : {
>      "param1" : "value1",
>      "param2" : "value2",
>      "query" : <JQO>,
>      "another-param" : <JQO>
>   }
> }
> {code}
> Therefore the above dismax query can be rewritten as ( be noticed that the query argument
in local parameters, is put as value of {{query}} field )
> {code}
> {
>   "dismax" : {
>      "qf" : "myfield"
>      "query" : "solr rocks"
>   }
> }
> {code}
> I will attach an HTML, contain more examples of Query DSL.



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