Re: SQL to list databases? - Mailing list pgsql-sql
From | Guy Fraser |
---|---|
Subject | Re: SQL to list databases? |
Date | |
Msg-id | 3E318553.7050101@incentre.net Whole thread Raw |
In response to | Re: calling function from rule ("Tambet Matiisen" <t.matiisen@aprote.ee>) |
List | pgsql-sql |
Hi To make it easier to do this in SQL you can create a view like this : CREATE VIEW db_list AS SELECT d.datname as "Name", u.usename as "Owner", pg_catalog.pg_encoding_to_char(d.encoding)as "Encoding" FROM pg_catalog.pg_database d LEFT JOIN pg_catalog.pg_user uON d.datdba = u.usesysid ORDER BY 1; Note: the "select" statement comes from the post I am replying from. Then all you have to do is : select * from db_list; For example this is my output : foobar=# select * from db_list; Name | Owner | Encoding -----------+-------+----------- foobar | turk | SQL_ASCII template0 | pgsql | SQL_ASCII template1 | pgsql | SQL_ASCII (3 rows) Or : foobar=# select "Name","Owner" from db_list where "Owner" != 'pgsql'; Name | Owner --------+------- foobar | turk (1 row) Using psql -E {database} interactivly Or psql -E -c "\{command}" {database} Example: user@host:~$ psql -E -c "\dt" template1 ********* QUERY ********** SELECT n.nspname as "Schema", c.relname as "Name", CASE c.relkind WHEN 'r' THEN 'table' WHEN 'v' THEN 'view' WHEN 'i' THEN 'index' WHEN 'S' THEN 'sequence' WHEN 's' THEN 'special' END as "Type", u.usename as "Owner" FROM pg_catalog.pg_class c LEFT JOIN pg_catalog.pg_user u ON u.usesysid = c.relowner LEFT JOIN pg_catalog.pg_namespacen ON n.oid = c.relnamespace WHERE c.relkind IN ('r','') AND n.nspname NOT IN ('pg_catalog', 'pg_toast') AND pg_catalog.pg_table_is_visible(c.oid) ORDER BY 1,2; ************************** You can collect the SQL for other helpful commands and build views like above, then you can query the view for more specific information. I hope this is helpful. Guy PS: If you create these "views" in template1 before you create your other databases, these views will be included in new databases automaticaly. Larry Rosenman wrote: > > > --On Thursday, January 23, 2003 12:56:50 -0600 Ben Siders > <bsiders@cms-stl.com> wrote: > >> >> Is there a query that will return all the databases available, similar to >> what psql -l does? >> > $ psql -E -l > ********* QUERY ********** > SELECT d.datname as "Name", > u.usename as "Owner", > pg_catalog.pg_encoding_to_char(d.encoding) as "Encoding" > FROM pg_catalog.pg_database d > LEFT JOIN pg_catalog.pg_user u ON d.datdba = u.usesysid > ORDER BY 1; > ************************** > >> >> >> ---------------------------(end of broadcast)--------------------------- >> TIP 6: Have you searched our list archives? >> >> http://archives.postgresql.org >> > > >