postgres修复db userdata并损坏

Question

postgres 8.4

==> /var/lib/pgsql/data/pg_log/postgresql-Tue.log <==
STATEMENT:  SELECT * FROM userdata WHERE normal_username='si0v'
ERROR:  relation "userdata" does not exist at character 13
LOG:  unexpected EOF on client connection
LOG:  unexpected EOF on client connection
LOG:  unexpected EOF on client connection

我该如何解决？ db的大小也令人难以置信地增加了！