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The previous code used ThisTimeLineID, which need not even be initialized here, although it usually was in practice, because pg_basebackup issues IDENTIFY_SYSTEM before calling BASE_BACKUP, and that initializes ThisTimeLineID as a side effect. That's not really good enough, though, not only because we shoudn't be counting on side effects like that, but also because the TLI could change meanwhile. Fortunately, we have convenient access to more meaningful TLI values, so use those instead. Because of the way this logic is coded, the consequences of using a possibly-incorrect TLI here are no worse than a slightly confusing error message, I don't want to take any risk here, so no back-patch at least for now. Patch by me, reviewed by Kyotaro Horiguchi and Michael Paquier Discussion: http://postgr.es/m/CA+TgmoZRNWGWYDX9RgTXMG6_nwSdB=PB-PPRUbvMUTGfmL2sHQ@mail.gmail.com |
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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/.