Subject: SolrClient#updateByQuery?

Hi Clemens,
You are thinking too RDMS. You can use query to select doc, but how would you provide what are updated doc? I guess you could use this approach only for incremental updates or with some scripting language. That is not supported at the moment. The best you can do is select and send updates as a single bulk.

Also use DBQ with caution - it does not work well with concurrent updates.

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