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We have code paths for Unix socket support and no Unix socket support. Now add a third variant: Unix socket support but do not use a Unix socket by default in the client or the server, only if you explicitly specify one. This will be useful when we enable Unix socket support on Windows. To implement this, tweak things so that setting DEFAULT_PGSOCKET_DIR to "" has the desired effect. This mostly already worked like that; only a few places needed to be adjusted. Notably, the reference to DEFAULT_PGSOCKET_DIR in UNIXSOCK_PATH() could be removed because all callers already resolve an empty socket directory setting with a default if appropriate. Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us> Discussion: https://www.postgresql.org/message-id/75f72249-8ae6-322a-63df-4fe03eeccb9f@2ndquadrant.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/.