Database Schema

wikipedia:Database schema are analogous to directories at the operating system level, except that schemas cannot be nested. Typical schemas usage scenarios :

• To allow many users to use one database without interfering with each other.
• To organize database objects into logical groups to make them more manageable.
• Third-party applications can be put into separate schemas so they do not collide with the names of other objects.

public or default

Examples

• CREATE SCHEMA

Grant examples on schemas:

• GRANT USAGE ON ALL SEQUENCES IN SCHEMA your_schema TO mygrp;
• GRANT USAGE ON SCHEMA your_schema TO GROUP your_group;

• Show/List schemas:
  • select nspname from pg_catalog.pg_namespace;
  • select schema_name from information_schema.schemata;
  • \dn
  • \dn+

PostgreSQL: pg_catalog and public.

GRANT SELECT ON ALL TABLES IN SCHEMA public TO xxx;

ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT SELECT ON TABLES TO xxx;

GRANT ALL PRIVILEGES ON SCHEMA

Errors

• ERROR: permission denied for schema public

Related

• Liquibase
• PostgreSQL, Amazon Redshift
• GRANT
• Role
• PostgreSQL: catalogs
• GRANT SELECT
• Index, Table, Schema, Sequence, Views, Materialized Views
• SET search_path, SHOW search_path
• GRANT ON ALL TABLES
• schema_name
• Snowflake schema

News

• Oct 2022 PostgreSQL 15, revokes the CREATE permission from all users except a database owner from the public (or default) schema

See also

• Schema, search_path, \dn+, GRANT ALL PRIVILEGES ON SCHEMA, schema migration, Schemacrawler

https://www.postgresql.org/docs/current/ddl-schemas.html

https://www.postgresql.org/docs/current/ddl-schemas.html

https://stackoverflow.com/a/10353730

https://dba.stackexchange.com/questions/40045/how-do-i-list-all-schemas-in-postgresql