# execute "UPDATE current_#{tbl} SET version = " +
# "(SELECT max(version) FROM #{tbl} WHERE #{tbl}.id = current_#{tbl}.id)"
# The above update causes a MySQL error:
# execute "UPDATE current_#{tbl} SET version = " +
# "(SELECT max(version) FROM #{tbl} WHERE #{tbl}.id = current_#{tbl}.id)"
# The above update causes a MySQL error: