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https://issues.apache.org/jira/browse/SOLR-14419?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17112869#comment-17112869
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Mikhail Khludnev commented on SOLR-14419:
-----------------------------------------

[~caomanhdat], I might not fully understand your point. Do you expect to put 
DSL objects into {{json.param}} like
{code}
{
   "param":{
            "q1" : {"lucene":{"query":"foo"}}
    }
}
{code} ?
I've found it unreachable in SOLR-12490 and introduced "json.queries". 

Ok. Here is a sample spinet for facet exclusion and nested docs facets:
{code}
q=*:*&prnts=content_type:parentDocument&
fq={!parent tag=sku_filters which=$prnts filters=$sku_fqs}&  // two refs, would 
be nice to express in DSL
sku_fqs={!tag=sku_attr1_tag}sku_attr1:foo&
sku_fqs={!tag=sku_attr2_tag}sku_attr2:bar&
json.facet={
    "sku_attr1":{ 
            "type":"terms",
            "field":"sku_attr1",
            "limit":-1,
            "domain":   {    
                      "excludeTags":"sku_filters",    // drop top level 
{!parent                     
                      "blockChildren":"{!v=$prnts}",
                      "filter":                                   // $sku_fqs 
refers many params that's not how it works by default
                              "{!filters param=$sku_fqs  
excludeTags=sku_attr1_tag}"
            },
            "facet": {
                "by_parent":"uniqueBlock(_root_)"
            }
     },
   ///  "sku_attr2":{ ... etc
}

{code} 



> Query DLS {"param":"ref"}
> -------------------------
>
>                 Key: SOLR-14419
>                 URL: https://issues.apache.org/jira/browse/SOLR-14419
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: JSON Request API
>            Reporter: Mikhail Khludnev
>            Assignee: Mikhail Khludnev
>            Priority: Major
>             Fix For: 8.6
>
>         Attachments: SOLR-14419.patch, SOLR-14419.patch, SOLR-14419.patch
>
>
> What we can do with plain params: 
> {{q=\{!parent which=$prnts}...&prnts=type:parent}}
> obviously I want to have something like this in Query DSL:
> {code}
> { "query": { "parents":{ "which":{"param":"prnts"}, "query":"..."}}
>   "params": {
>           "prnts":"type:parent"
>    }
> }
> {code} 



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