Sql error 42501 ошибка нет доступа к схеме

The first comment nailed the most likely reason this is happening. Quoting the release announcement:

PostgreSQL 15 also revokes the CREATE permission from all users except a database owner from the public (or default) schema.

The reason your fix didn’t work is that all actions you took on database postgres in regards to user admin‘s privileges on schema public concern only that schema within the database postgres. Schema public on database postgres is not the same schema public as the one on newly created mydb.

Also, this:

GRANT ALL ON DATABASE mydb TO admin;

grants privileges on the database itself, not things within the database. admin can now drop the database, for example, still without being able to create tables in schema public. My guess is that you wanted to make admin also the owner of mydb, in which case you need to add

ALTER DATABASE mydb OWNER TO admin;

Or you need to repeat your GRANT USAGE, CREATE ON SCHEMA public TO admin; on mydb.

Here’s some more documentation on secure schema usage patterns the PostgreSQL 15 change was based on.

I kept getting this error when using flyway to deploy database changes. I do some manual setup first, such as creating the database, so flyway wouldn’t need those super-admin permissions.

My Fix

I had to ensure that the database user that flyway job used had ownership rights to the public schema, so that the flyway user could then assign the right to use the schema to other roles.

Additional setup Details

I am using AWS RDS (both regular and Aurora), and they don’t allow super users in the databases. RDS reserves super users for use by AWS, only, so that consumers are unable to break the replication stuff that is built in. However, there’s a catch-22 that you must be an owner in postgres to be able to modify it.

My solution was to create a role that acts as the owner (‘owner role’), and then assign both my admin user and the flyway user to the owner role, and use ALTER scripts for each object to assign the object’s owner to the owner role.

I missed the public schema, since that was auto-created when I created the database script manually. The public schema defaulted to my admin role rather than the shared owner role. So when the flyway user tried to assign public schema permissions to other roles, it didn’t have the authority to do that. An error was not thrown during flyway execution, however.

I kept getting this error when using flyway to deploy database changes. I do some manual setup first, such as creating the database, so flyway wouldn’t need those super-admin permissions.

My Fix

I had to ensure that the database user that flyway job used had ownership rights to the public schema, so that the flyway user could then assign the right to use the schema to other roles.

Additional setup Details

I am using AWS RDS (both regular and Aurora), and they don’t allow super users in the databases. RDS reserves super users for use by AWS, only, so that consumers are unable to break the replication stuff that is built in. However, there’s a catch-22 that you must be an owner in postgres to be able to modify it.

My solution was to create a role that acts as the owner (‘owner role’), and then assign both my admin user and the flyway user to the owner role, and use ALTER scripts for each object to assign the object’s owner to the owner role.

I missed the public schema, since that was auto-created when I created the database script manually. The public schema defaulted to my admin role rather than the shared owner role. So when the flyway user tried to assign public schema permissions to other roles, it didn’t have the authority to do that. An error was not thrown during flyway execution, however.

In Postgres I created the following table inside a db called testing:

CREATE TABLE category_google_taxonomy (
    category_id integer references category ON UPDATE CASCADE ON DELETE CASCADE,
    google_taxonomy_id integer references google_taxonomy ON UPDATE CASCADE ON DELETE     CASCADE
);

When I try to populate the table:

INSERT INTO category_google_taxonomy (category_id, google_taxonomy_id) VALUES
(1,7),
(2,12);

I get the following error:

ERROR:  permission denied for schema public
LINE 1: SELECT 1 FROM ONLY "public"."category" x WHERE "category_id"...
                       ^
QUERY:  SELECT 1 FROM ONLY "public"."category" x WHERE "category_id" OPERATOR(pg_catalog.=) $1 FOR SHARE OF x

I read up a bit and eventually granted ALL PRIVILEGES out of exasperation, but it still doesn’t work:

testing=# GRANT ALL PRIVILEGES ON public.category TO testing;
GRANT

testing=# dp category_google_taxonomy
                                   Access privileges
 Schema |           Name           | Type  |    Access privileges    | Column access privileges 
--------+--------------------------+-------+-------------------------+--------------------------
 public | category_google_taxonomy | table | testing=arwdDxt/testing | 
                                           : super=arwdDxt/testing 


testing=# dp category
                           Access privileges
 Schema |   Name   | Type  |   Access privileges    | Column access privileges 
--------+----------+-------+------------------------+--------------------------
 public | category | table | testing=arwdDxt/super | category_id:
                                                :   testing=arwx/super
(1 row)

On @Daniel’s suggestion I tried GRANT USAGE ON schema public TO super;, now when I run the INSERT command I get:

ERROR:  permission denied for relation category
CONTEXT:  SQL statement "SELECT 1 FROM ONLY "public"."category" x WHERE "category_id" OPERATOR(pg_catalog.=) $1 FOR SHARE OF x"

Here is the relevant part of d:

public | category                               | table    | super
public | category_google_taxonomy               | table    | testing

grant usage on schema myschema to newuser;

grant select on all tables in schema myschema to newuser;

select * from myschema.table;

SQL Error [42501]: ERROR: permission denied for schema myschema

Ответы
2

Другие вопросы по теме

postgres=# CREATE ROLE my_role;
           CREATE DATABASE my_db;
           GRANT ALL ON DATABASE my_db TO my_role;
           CREATE SCHEMA my_schm AUTHORIZATION my_role;

postgres=#CREATE TABLE IF NOT EXIST my_db.my_schm.table(...);

schema "my_schm"does not exist

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