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Refactor the checks in the function to move all the conditions for when to attempt creating a shell type into one place. Add a check for the array syntax. In addition to rejecting array syntax, another user-visible effect is that the error message is now different if the type specified a typmod. You now get "type does not exist" instead of the more specific "type modifier cannot be specified for shell type". That seems better; the implicit shell type creation exists only for backwards compatibility, and it never worked with type modifiers, so if there's a type modifier it's most likely not because the user tried to create a shell type, Add test for the array syntax, the type modifier, and some other cases for which we don't create shell types. Discussion: https://www.postgresql.org/message-id/de673feb-41b4-4685-b24b-6408b95e58ab@iki.fi Backpatch-through: 14
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. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download/ See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.