mirror of
https://github.com/postgres/postgres.git
synced 2025-06-04 00:02:37 -04:00
5c292e6b90
This allows use of a "default" expression that doesn't slavishly match the data column's type. Formerly you got something like "function lag(numeric, integer, integer) does not exist", which is not just unhelpful but actively misleading. The SQL spec suggests that the default should be coerced to the data column's type, but this implementation instead chooses the common supertype, which seems at least as reasonable. (Note: I took the opportunity to run "make reformat-dat-files" on pg_proc.dat, so this commit includes some cosmetic changes to recently-added entries that aren't related to lead/lag.) Vik Fearing Discussion: https://postgr.es/m/77675130-89da-dab1-51dd-492c93dcf5d1@postgresfriends.org
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/.