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From Alexey Serba <>
Subject Re: Large RDBMS dataset
Date Thu, 29 Dec 2011 13:23:51 GMT
> The problem is that for each record in "fd", Solr makes three distinct SELECT on the other
three tables. Of course, this is absolutely inefficient.

You can also try to use GROUP_CONCAT (it's MySQL function, but maybe
there's something similar in MS SQL) to select all the nested 1-N
entities in a single result set as strings joined using some separator
and then split them into multivalued fields in post processing phase
(using regex template transformer or similar)

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