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https://issues.apache.org/jira/browse/SOLR-10512?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15972913#comment-15972913
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Joel Bernstein commented on SOLR-10512:
---------------------------------------
Based on the email thread it sounds like the query works if the 'on' parameter
is transposed. The test cases don't cover this exact scenario.
> Innerjoin streaming expressions - Invalid JoinStream error
> ----------------------------------------------------------
>
> Key: SOLR-10512
> URL: https://issues.apache.org/jira/browse/SOLR-10512
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: search
> Affects Versions: 6.4.2, 6.5
> Environment: Debian Jessie
> Reporter: Dominique Béjean
>
> It looks like innerJoin streaming expression do not work as explained in
> documentation. An invalid JoinStream error occurs.
> {noformat}
> curl --data-urlencode 'expr=innerJoin(
> search(books,
> q="*:*",
> fl="id",
> sort="id asc"),
> searchreviews,
> q="*:*",
> fl="id_book_s",
> sort="id_book_s asc"),
> on="id=id_books_s"
> )' http://localhost:8983/solr/books/stream
>
> {"result-set":{"docs":[{"EXCEPTION":"Invalid JoinStream - all incoming stream
> comparators (sort) must be a superset of this stream's
> equalitor.","EOF":true}]}}
> {noformat}
> It is tottaly similar to the documentation example
>
> {noformat}
> innerJoin(
> search(people, q=*:*, fl="personId,name", sort="personId asc"),
> search(pets, q=type:cat, fl="ownerId,petName", sort="ownerId asc"),
> on="personId=ownerId"
> )
> {noformat}
> Queries on each collection give :
> {noformat}
> $ curl --data-urlencode 'expr=search(books,
> q="*:*",
> fl="id, title_s, pubyear_i",
> sort="pubyear_i asc",
> qt="/export")'
> http://localhost:8983/solr/books/stream
> {
> "result-set": {
> "docs": [
> {
> "title_s": "Friends",
> "pubyear_i": 1994,
> "id": "book2"
> },
> {
> "title_s": "The Way of Kings",
> "pubyear_i": 2010,
> "id": "book1"
> },
> {
> "EOF": true,
> "RESPONSE_TIME": 16
> }
> ]
> }
> }
> $ curl --data-urlencode 'expr=search(reviews,
> q="author_s:d*",
> fl="id, id_book_s, stars_i, review_dt",
> sort="id_book_s asc",
> qt="/export")'
> http://localhost:8983/solr/reviews/stream
>
> {
> "result-set": {
> "docs": [
> {
> "stars_i": 3,
> "id": "book1_c2",
> "id_book_s": "book1",
> "review_dt": "2014-03-15T12:00:00Z"
> },
> {
> "stars_i": 4,
> "id": "book1_c3",
> "id_book_s": "book1",
> "review_dt": "2014-12-15T12:00:00Z"
> },
> {
> "stars_i": 3,
> "id": "book2_c2",
> "id_book_s": "book2",
> "review_dt": "1994-03-15T12:00:00Z"
> },
> {
> "stars_i": 4,
> "id": "book2_c3",
> "id_book_s": "book2",
> "review_dt": "1994-12-15T12:00:00Z"
> },
> {
> "EOF": true,
> "RESPONSE_TIME": 47
> }
> ]
> }
> }
> {noformat}
> After more tests, I just had to invert the "on" clause to make it work
> {noformat}
> curl --data-urlencode 'expr=innerJoin(
> search(books,
> q="*:*",
> fl="id",
> sort="id asc"),
> searchreviews,
> q="*:*",
> fl="id_book_s",
> sort="id_book_s asc"),
> on="id_books_s=id"
> )' http://localhost:8983/solr/books/stream
>
> {
> "result-set": {
> "docs": [
> {
> "title_s": "The Way of Kings",
> "pubyear_i": 2010,
> "stars_i": 5,
> "id": "book1",
> "id_book_s": "book1",
> "review_dt": "2015-01-03T14:30:00Z"
> },
> {
> "title_s": "The Way of Kings",
> "pubyear_i": 2010,
> "stars_i": 3,
> "id": "book1",
> "id_book_s": "book1",
> "review_dt": "2014-03-15T12:00:00Z"
> },
> {
> "title_s": "The Way of Kings",
> "pubyear_i": 2010,
> "stars_i": 4,
> "id": "book1",
> "id_book_s": "book1",
> "review_dt": "2014-12-15T12:00:00Z"
> },
> {
> "title_s": "Friends",
> "pubyear_i": 1994,
> "stars_i": 5,
> "id": "book2",
> "id_book_s": "book2",
> "review_dt": "1995-01-03T14:30:00Z"
> },
> {
> "title_s": "Friends",
> "pubyear_i": 1994,
> "stars_i": 3,
> "id": "book2",
> "id_book_s": "book2",
> "review_dt": "1994-03-15T12:00:00Z"
> },
> {
> "title_s": "Friends",
> "pubyear_i": 1994,
> "stars_i": 4,
> "id": "book2",
> "id_book_s": "book2",
> "review_dt": "1994-12-15T12:00:00Z"
> },
> {
> "EOF": true,
> "RESPONSE_TIME": 35
> }
> ]
> }
> }
> {noformat}
> However, I don't understand the reason as in debug mode I see the
> isValidTupleOrder method should return true in both case.
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