OK - I see looking at the code that an exception is thrown if a parent
doc matches the subquery -- so that explains what will happen, but I
guess my further question is -- is that necessary? Could we just not
throw an exception there?
-Mike
On 12/16/2014 10:38 AM, Michael Sokolov wrote:
I see in the docs of ToParentBlockJoinQuery that:
* The child documents must be orthogonal to the parent
* documents: the wrapped child query must never
* return a parent document.
First, it would be helpful if the docs explained what would happen if
that assumption were violated.
Second, I want to do that!
My parent documents have the same fields as their child documents
(title, text, etc): in some cases the best match for a query is the
entire book, (ie a query for "Java Programming"), in other cases it is
a specific chapter (a query for "Java regular expressions").
Currently I am using Solr grouping queries to roll up parent and
child, but I am hoping to get a performance boost by using the
parent/child indexing which is a natural for us since we always index
a book at a time.
If need be, I will simply index a child document that represents the
parent (ie duplicate the parent document but with a different type so
as to exclude it from the join subquery), but is this really
necessary? If so, can you explain why?
Thanks
-Mike
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