1b1960c8c9
Previously, duplicate labels in CREATE TYPE AS ENUM were caught by the unique index on pg_enum, resulting in a generic error message. While this was evidently intentional, it's not terribly user-friendly, nor consistent with the ALTER TYPE cases which take more care with such errors. This patch adds an explicit check to produce a more user-friendly and descriptive error message. A potential objection to this implementation is that it adds O(N^2) work to the creation operation. However, quick testing finds that that's pretty negligible below 1000 enum labels, and tolerable even at 10000. So it doesn't really seem worth being smarter. Author: Yugo Nagata <nagata@sraoss.co.jp> Reviewed-by: Rahila Syed <rahilasyed90@gmail.com> Reviewed-by: Jim Jones <jim.jones@uni-muenster.de> Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us> Discussion: https://postgr.es/m/20250704000402.37e605ab0c59c300965a17ee@sraoss.co.jp
PostgreSQL Database Management System
This directory contains the source code distribution of the PostgreSQL database management system.
PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.