Re-posting, just in case if this one fell through crack.
Thanks,
Anand
On 2/1/2014 12:48 PM, anand chandak wrote:
Folks, have a basic question regarding solr join, the wiki,
<http://wiki.apache.org/solr/Join> states : -
"Fields or other properties of the documents being joined "from" are
not available for use in processing of the resulting set of "to"
documents (ie: you can not return fields in the "from" documents as if
they were a multivalued field on the "to" documents)".
I am finding it hard to understand the above limitation of solr
join,does it means that unlike the traditional RDMS joins that can
have columns from both the TO and FROM field, solr joins will only
have fields from the TO documents ? Is my understanding correct ?
Also, there's some difference with respect to scoring and towards that
the wiki says :
"The Join query produces constant scores for all documents that match
-- scores computed by the nested query for the "from" documents are
not available to use in scoring the "to" documents" Does it mean the
subquery's score is not available the main query? Is this behaviour
true for the lucene join too ?
Basically, i am trying to understand where and how solr joins differ
from lucene joins. Any pointers, much appreciated ?
I have posted same question on the stackoverflow
<http://stackoverflow.com/questions/21480628/solr-join-vs-lucene-join>
Thanks,
Anand
