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If any of these commands fail during editing or pre-processing, the command stored in the query buffer would remain around without being executed immediately as PSQL_CMD_ERROR is returned as status. The next command provided by the user would run it, likely causing failures as this could include silently some of the contents generated automatically for views or functions. The problems would be different depending on the psql meta-command used: - For \ev and \ef, some errors can happen in a predictable way while doing an object lookup or while creating an object command. A failure while editing is equally problematic, but the class of failures happening in the code path of do_edit() are unlikely. The query reset is kept in exec_command_ef_ev() as a query may be unchanged. - For \e, error can happen while editing. In both cases, the query buffer is reset on error for an incorrect file number provided, whose value check is done before filling up the query buffer. This is a slight change of behavior compared to the past for some of the predictable error patterns for \ev and \ef, so for now I have made the choice to not backpatch this commit (argument particularly available for v11 that's going to be EOL'd soon). Perhaps this could be revisited later depending on the feedback of this new behavior. Author: Ryoga Yoshida, Michael Paquier Reviewed-by: Aleksander Alekseev, Kyotaro Horiguchi Discussion: https://postgr.es/m/01419622d84ef093fd4fe585520bf03c@oss.nttdata.com
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/.