Solr: Mysqli prepare error

Plugin and Solr cores are running just fine. However, upon hitting the "clear and reindex" button on the Solr plugin index tab, I am presented with:

Mysqli prepare error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')) ORDER BY ASC LIMIT 100' at line 1

Any ideas why I would be getting this error? Haven't really changed anything in database.