Especially since we're asking for these to be cached.
Management of prepared statements isn't trivial, since you don't want to keep
them forever as this can lead to poor query performance, but I don't think
that finalizing them immediately is the right solution.
Change-Id: I61706b4d09d771835bb8f074b8f6a6ee871f5e2d
* guix/store/database.scm (sqlite-step-and-reset): New procedure.
(last-insert-row, path-id, update-or-insert, add-references): Don't finalize
prepared statements.
Change-Id: I2a2c6deb43935d67df9e43000a5105343d72b3e6