I have a fairly simple need to do a conditional update in Solr, which is
easily accomplished in MySQL.
For example,
* I have 100 documents with a unique field called <id>
* I am POSTing 10 documents, some of which may be duplicate <id>s, in
which case Solr would update the existing records with the same <id>s
* I have a field called <dateCreated> and I would like to only update a
<doc> if the new <dateCreated> is greated than the old <dateCreated> (this
applies to duplicate <id>s only, of course)
How would I be able to accomplish such a thing?
The context is trying to combat race conditions resulting in multiple adds
for the same ID but executing in the wrong order.
Thanks.
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