Is there a way to get all the schemas that exist on the DB server?
SELECT schema_name
FROM information_schema.schemata
WHERE schema_name NOT LIKE 'pg%'
AND schema_name NOT LIKE 'information_schema'
AND catalog_name LIKE 'YOUR_DATABASE_NAME'
Two NOT LIKE clauses are to avoid system schemas
Related
I have two databases new_site,old_site I'm connecting to the database server via Postgres user and have full permission and I connect to new_site db.
I need to get tables names for old_site so I tried this:
SELECT table_name
FROM information_schema.tables
WHERE table_catalog = $$old_site$$;
but I get a null as result.
If I run this query:
SELECT table_name
FROM information_schema.tables
WHERE table_catalog = current_database();
I get back the table name and it works.
I expect the output is table name of old_site db, how can I do this?
I was also reading some solutions here like:
Selecting column name from other database table through function in PostgreSQL
But it's not like my case.
We have a around 100+ schema maintained in PostgreSQL. Now we want to query on all schema, is there any way to do that?
other than views, procedures and union all?
Any postgres functions which let you query on multiple schemas
The following catalog query will produce valid queries for every table on all schemas of your database. You can copy this to a valid SQL file.
SELECT 'SELECT * FROM ' || table_schema || '.' || table_name || ';' AS query
FROM information_schema.tables
WHERE table_schema IN
(
SELECT schema_name
FROM information_schema.schemata
WHERE schema_name NOT LIKE 'pg_%' AND schema_name != 'information_schema'
);
Does this help?
I have a database with many tables that are used as a reference for valid values in the other tables. These reference tables are all named valid[table], so I can display them in psql with \dt valid*.
I'd like to be able to select all the non-reference tables (which are more variably named, but none of them start with valid), but can't figure out how. I've tried various things like \dt !valid* , \dt !~valid* , \dt NOT LIKE 'valid%', but these either error or don't find a match.
Any suggestions would be appreciated!
According to the manual, psql supports these patterns. Normally you could use regular expression negative lookahead (?!valid)* but ? cannot be used in regular expression with psql because it is translated to .. It is probably easier to do a query from INFROMATION SCHEMA:
SELECT table_name FROM information_schema.tables
WHERE table_schema NOT IN ('pg_catalog', 'information_schema') --exclude system tables
AND table_type = 'BASE TABLE' -- only tables
AND table_name NOT LIKE 'valid%';
I have looked into the documentation for GRANT Found here and I was trying to see if there is a built-in function that can let me look at what level of accessibility I have in databases. Of course there is:
\dp and \dp mytablename
But this does not show what my account has access to. I would like to see ALL the tables I have access to. Can anyone tell me if there is a command that can check my level of access in Postgres (whether I have SELECT, INSERT, DELETE, UPDATE privileges)? And if so, what would that command be?
You could query the table_privileges table in the information schema:
SELECT table_catalog, table_schema, table_name, privilege_type
FROM information_schema.table_privileges
WHERE grantee = 'MY_USER'
For all users on a specific database, do the following:
# psql
\c your_database
select grantee, table_catalog, privilege_type, table_schema, table_name from information_schema.table_privileges order by grantee, table_schema, table_name;
Use this to list Grantee too and remove (PG_monitor and Public) for Postgres PaaS Azure.
SELECT grantee,table_catalog, table_schema, table_name, privilege_type
FROM information_schema.table_privileges
WHERE grantee not in ('pg_monitor','PUBLIC');
Is there any query available to list all tables in my Postgres DB.
I tried out one query like:
SELECT table_name FROM information_schema.tables
WHERE table_schema='public'
But this query returns views also.
How can i get only table names only, not views?
What bout this query (based on the description from manual)?
SELECT table_name
FROM information_schema.tables
WHERE table_schema='public'
AND table_type='BASE TABLE';
If you want list of database
SELECT datname FROM pg_database WHERE datistemplate = false;
If you want list of tables from current pg installation of all databases
SELECT table_schema,table_name FROM information_schema.tables
ORDER BY table_schema,table_name;
Open up the postgres terminal with the databse you would like:
psql dbname (run this line in a terminal)
then, run this command in the postgres environment
\d
This will describe all tables by name. Basically a list of tables by name ascending.
Then you can try this to describe a table by fields:
\d tablename.
Hope this helps.
Try this:
SELECT table_name
FROM information_schema.tables
WHERE table_schema='public' AND table_type='BASE TABLE'
this one works!
SELECT table_name
FROM information_schema.tables
WHERE table_type='BASE TABLE'
AND table_schema='public';
For MySQL you would need table_schema='dbName' and for MSSQL remove that condition.
Notice that "only those tables and views are shown that the current user has access to". Also, if you have access to many databases and want to limit the result to a certain database, you can achieve that by adding condition AND table_catalog='yourDatabase' (in PostgreSQL).
If you'd also like to get rid of the header showing row names and footer showing row count, you could either start the psql with command line option -t (short for --tuples-only) or you can toggle the setting in psql's command line by \t (short for \pset tuples_only). This could be useful for example when piping output to another command with \g [ |command ].
How about giving just \dt in psql? See https://www.postgresql.org/docs/current/static/app-psql.html.
select
relname as table
from
pg_stat_user_tables
where schemaname = 'public'
This will not work if track_activities is disabled
select
tablename as table
from
pg_tables
where schemaname = 'public'
Read more about pg_tables