The following documentation comment has been logged on the website: Page: https://www.postgresql.org/docs/9.6/static/sql-createtable.html Description:
The EXCLUDE docs say "The EXCLUDE clause defines an exclusion constraint, which guarantees that if any two rows are compared on the specified column(s) or expression(s) using the specified operator(s), not all of these comparisons will return TRUE." It also says "for equality, this is equivalent to a UNIQUE constraint". The current documentation saying "not all" is not the same as a unique constraint, because in the case of equality, it is logically stating that "All rows - 1 can be equal", which satisfies "not all" pairs. Instead it should say that no pairs, or none, return true. -- Sent via pgsql-docs mailing list (pgsql-docs@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-docs
