til/postgres/pg-prefix-is-reserved-for-system-schemas.md

pg Prefix Is Reserved For System Schemas

Have you ever tried to create a schema with pg_ as the first part of the name of the schema? If so, you probably didn't get very far. Postgres won't let you do that. It reserves the pg_ prefix for system schemas. If you try to create a schema in this way, you'll get an unacceptable schema name error.

> create schema pg_cannot_do_this;
ERROR:  unacceptable schema name "pg_cannot_do_this"
DETAIL:  The prefix "pg_" is reserved for system schemas.