Hmmmm... Take care when using placeholders as tablenames; you'll better check if that works with your DB and should avoid it even if it works if portability matters.

The DBI documentation mentions that
---

With most drivers, placeholders can't be used for any element of a sta
+tement that would prevent the database server from validating the sta
+tement and creating a query execution plan for it. For example:

         "SELECT name, age FROM ?"         # wrong (will probably fail
+)
         "SELECT name, ?   FROM people"    # wrong (but may not 'fail'
+)
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