Tom Lane napisał(a):
Bartosz Nowak <grubby@xxxxxx> writes:
postgres=> select ctid,xmin,xmax,cmin,xmax,* from pg_shadow where
usename = 'postgres';
ctid | xmin | xmax | cmin | xmax | usename | usesysid |
usecreatedb | usesuper | usecatupd |
passwd | valuntil | useconfig
--------+------------+-------+-------+-------+----------+----------+-------------+----------+-----------+-------------------------------------+----------+-----------
(0,1) | 1 | 50469 | 50469 | 50469 | postgres | 1 |
t | t | t
| | |
(1,25) | 2559800612 | 0 | 0 | 0 | postgres | 1 |
t | t | t |
md5c084502ed11efa9d3d96d29717a5e555 | |
(2 rows)
Hmm --- clearly, that second xmin is corrupt. I'd venture that this
is the result of a rolled-back (crashed?) ALTER USER SET PASSWORD
operation, in which somehow the new tuple's xmin got clobbered ... and
more than likely, its XMIN_COMMITTED bit got set at the same time.
You could manually delete either row, probably better to zap the second
one:
delete from pg_shadow where ctid = '(1,25)';
and then things should be OK. A dump and reload wouldn't be a bad idea
though, since there may be other corruption elsewhere that you haven't
noticed yet.
regards, tom lane
Heh... i wish it was that easy - i tried it already :] When i delete the
'second' postgres user (with passwd set) PG is acting like there is no
postgres account at all:
pg_dumpall -i -U mw > test.sql
pg_dump: SQL command failed
pg_dump: Error message from server: ERROR: pg_class_aclcheck: invalid
user id 1
pg_dump: The command was: SELECT (SELECT usename FROM pg_user WHERE
usesysid = datdba) as dba, pg_encoding_to_char(encoding) as encoding,
datpath FROM pg_database WHERE datname = 'alibi'
pg_dumpall: pg_dump failed on database "alibi", exiting
pg_dumpall -i -U postgres > test.sql
pg_dumpall: could not connect to database "template1": FATAL: user
"postgres" does not exist
psql -U postgres
psql: FATAL: user "postgres" does not exist
And i cannot modify row of 'first' postgres user (without passwd set)
with or without 'second' present:
mw=> delete from pg_shadow where ctid = '(0,1)' ;
DELETE 0
mw=> update pg_catalog.pg_shadow set passwd='test' where
usename='postgres' and ctid = '(0,1)';
UPDATE 0
So further help will be welcomed :) And thank U for trying to help me.
Greetings,
Bartek
