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I started out with the goal of reporting ERRCODE_CONNECTION_FAILURE when walrcv_connect() fails, but as I looked around I realized that whoever wrote this code was of the opinion that errcodes are purely optional. That's not my understanding of our project policy. Hence, make sure that an errcode is provided in each ereport that (a) is ERROR or higher level and (b) isn't arguably an internal logic error. Also fix some very dubious existing errcode assignments. While this is not per policy, it's also largely cosmetic, since few of these cases could get reported to applications. So I don't feel a need to back-patch. Discussion: https://postgr.es/m/2189704.1623512522@sss.pgh.pa.us
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/.