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There's no reason not to expose both restart_lsn and confirmed_flush since they have rather distinct meanings. The former is the oldest WAL still required and valid for both physical and logical slots, whereas the latter is the location up to which a logical slot's consumer has confirmed receiving data. Most of the time a slot will require older WAL (i.e. restart_lsn) than the confirmed position (i.e. confirmed_flush_lsn). Author: Marko Tiikkaja, editorialized by me Discussion: 559D110B.1020109@joh.to
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: http://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 http://www.postgresql.org/download/. For more information look at our web site located at http://www.postgresql.org/.