diff --git a/doc/src/sgml/ddl.sgml b/doc/src/sgml/ddl.sgml index ed034a6b1d..38618de01c 100644 --- a/doc/src/sgml/ddl.sgml +++ b/doc/src/sgml/ddl.sgml @@ -3211,40 +3211,43 @@ REVOKE CREATE ON SCHEMA public FROM PUBLIC; query that database would take protective action at the beginning of each session. Specifically, they would begin each session by setting search_path to the empty string or otherwise - removing non-superuser-writable schemas + removing schemas that are writable by non-superusers from search_path. There are a few usage patterns easily supported by the default configuration: - + - Constrain ordinary users to user-private schemas. To implement this, - first issue REVOKE CREATE ON SCHEMA public FROM - PUBLIC. Then, for every user needing to create non-temporary - objects, create a schema with the same name as that user. Recall that - the default search path starts with $user, which - resolves to the user name. Therefore, if each user has a separate - schema, they access their own schemas by default. After adopting this - pattern in a database where untrusted users had already logged in, - consider auditing the public schema for objects named like objects in - schema pg_catalog. This pattern is a secure schema - usage pattern unless an untrusted user is the database owner or holds - the CREATEROLE privilege, in which case no secure - schema usage pattern exists. - - - If the database originated in an upgrade - from PostgreSQL 14 or earlier, - the REVOKE is essential. Otherwise, the default - configuration follows this pattern; ordinary users can create only - temporary objects until a privileged user furnishes a schema. + In PostgreSQL 15 and later, the default + configuration supports this usage pattern. In prior versions, or + when using a database that has been upgraded from a prior version, + you will need to remove the public CREATE + privilege from the public schema (issue + REVOKE CREATE ON SCHEMA public FROM PUBLIC). + Then consider auditing the public schema for + objects named like objects in schema pg_catalog. +