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List:       postgresql-admin
Subject:    [ADMIN] Error:PG_DUMP relation pg_user does not exist
From:       Fred Pope <fred.pope () satcomresources ! com>
Date:       2005-10-28 21:20:54
Message-ID: 43629636.4050906 () satcomresources ! com
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I am running Postgresql 7.4.7. on RedHat ES-64 version 4 on a 
Dual-Opteron Dual Core system.

I am having problems with the pg_dump command due to improper 
initialization of the Database cluster on RH ES 4.

The initial symptom was visible on execution of the command:

pg_dump mydatabase > /tmp/mydatabase.dump

<error-message>
pg_dump: SQL command failed
pg_dump: Error message from server: ERROR:  relation "pg_user" does not 
exist
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 = 'mydatabase'
</error-message>

Hence I went into the mydatabase catalog and created that above 
mentioned view, and now when I execute that query from within the 
respective catalogs I get:

<response>
mydatabase=# select (select usename from pg_user where usesysid = 
datdba) as dba, pg_encoding_to_char(encoding), datpath as encoding from 
pg_database where datname = 'mydatabase';
    dba    | pg_encoding_to_char | encoding
----------+---------------------+----------
  postgres | SQL_ASCII           |
(1 row)
</response>

When the database engine is calling this query from the pg_dump command, 
I am assuming this is calling from the database that you are trying to 
dump. However, the following result makes me question this.

psql -l which returns:
<response>
bash-3.00$ psql -l
ERROR:  relation "pg_catalog.pg_user" does not exist
</response>

Hence this led me to try:

create view pg_catalog.pg_user as select pg_shadow.usename, 
pg_shadow.usesysid, pg_shadow.usecreatedb, pg_shadow.usesuper, 
pg_shadow.usecatupd, '********'::text as passwd, pg_shadow.valuntil, 
pg_shadow.useconfig from pg_shadow;

<response>
ERROR:  permission denied to create "pg_catalog.pg_user"
DETAIL:  System catalog modifications are currently disallowed.
</response>

So my question now is how do I enable system catalog modifications.

Thanks in advance.

fred at satcomresources dot com

["fred.pope.vcf" (text/x-vcard)]

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