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https://issues.apache.org/jira/browse/SOLR-12096?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16415656#comment-16415656
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Mikhail Khludnev commented on SOLR-12096:
-----------------------------------------
Contributing test [^SOLR-12096.testsubquery.patch], please incorporate into the
patch.
> Inconsistent response format in subquery transform
> --------------------------------------------------
>
> Key: SOLR-12096
> URL: https://issues.apache.org/jira/browse/SOLR-12096
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Munendra S N
> Assignee: Ishan Chattopadhyaya
> Priority: Major
> Attachments: SOLR-12096.patch, SOLR-12096.patch, SOLR-12096.patch,
> SOLR-12096.patch, SOLR-12096.testsubquery.patch
>
>
> Solr version - 6.6.2
> The response of subquery transform is inconsistent with multi-shard compared
> to single-shard
> h1. Single Shard collection
> Request
> {code:java}
> localhost:8983/solr/k_test/search?sort=score desc,uniqueId
> desc&q.op=AND&wt=json&q={!parent which=parent_field:true score=max}({!edismax
> v=$origQuery})&facet=false&fl=uniqueId&fl=score&fl=_children_:[subquery]&fl=uniqueId&origQuery=false&qf=parent_field&_children_.fl=uniqueId&_children_.fl=score&_children_.rows=3&spellcheck=false&_children_.q={!edismax
> qf=parentId v=$row.uniqueId}&rows=1
> {code}
> Response for above request
> {code:json}
> {
> "responseHeader": {
> "zkConnected": true,
> "status": 0,
> "QTime": 0,
> "params": {
> "fl": [
> "uniqueId",
> "score",
> "_children_:[subquery]",
> "uniqueId"
> ],
> "origQuery": "false",
> "q.op": "AND",
> "_children_.rows": "3",
> "sort": "score desc,uniqueId desc",
> "rows": "1",
> "q": "{!parent which=parent_field:true score=max}({!edismax
> v=$origQuery})",
> "qf": "parent_field",
> "spellcheck": "false",
> "_children_.q": "{!edismax qf=parentId v=$row.uniqueId}",
> "_children_.fl": [
> "uniqueId",
> "score"
> ],
> "wt": "json",
> "facet": "false"
> }
> },
> "response": {
> "numFound": 1,
> "start": 0,
> "maxScore": 0.5,
> "docs": [
> {
> "uniqueId": "10001677",
> "score": 0.5,
> "_children_": {
> "numFound": 9,
> "start": 0,
> "docs": [
> {
> "uniqueId": "100016771",
> "score": 0.5
> },
> {
> "uniqueId": "100016772",
> "score": 0.5
> },
> {
> "uniqueId": "100016773",
> "score": 0.5
> }
> ]
> }
> }
> ]
> }
> }
> {code}
> Here, *_children_* suquery response is as expected (Based on documentation)
> h1. Multi Shard collection(2)
> Request
> {code:java}
> localhost:8983/solr/k_test_2/search?sort=score desc,uniqueId
> desc&q.op=AND&wt=json&q={!parent which=parent_field:true score=max}({!edismax
> v=$origQuery})&facet=false&fl=uniqueId&fl=score&fl=_children_:[subquery]&fl=uniqueId&origQuery=false&qf=parent_field&_children_.fl=uniqueId&_children_.fl=score&_children_.rows=3&spellcheck=false&_children_.q={!edismax
> qf=parentId v=$row.uniqueId}&rows=1
> {code}
> Response
> {code:json}
> {
> "responseHeader": {
> "zkConnected": true,
> "status": 0,
> "QTime": 11,
> "params": {
> "fl": [
> "uniqueId",
> "score",
> "_children_:[subquery]",
> "uniqueId"
> ],
> "origQuery": "false",
> "q.op": "AND",
> "_children_.rows": "3",
> "sort": "score desc,uniqueId desc",
> "rows": "1",
> "q": "{!parent which=parent_field:true score=max}({!edismax
> v=$origQuery})",
> "qf": "parent_field",
> "spellcheck": "false",
> "_children_.q": "{!edismax qf=parentId v=$row.uniqueId}",
> "_children_.fl": [
> "uniqueId",
> "score"
> ],
> "wt": "json",
> "facet": "false"
> }
> },
> "response": {
> "numFound": 5,
> "start": 0,
> "maxScore": 0.5,
> "docs": [
> {
> "uniqueId": "10006197",
> "_children_": [
> {
> "uniqueId": "100061971",
> "score": 0.5
> },
> {
> "uniqueId": "100061972",
> "score": 0.5
> },
> {
> "uniqueId": "100061973",
> "score": 0.5
> }
> ],
> "score": 0.5
> }
> ]
> }
> }
> {code}
> As you can see, *_children_* subquery response is a list instead of Map
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