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Avoid creating transiently-inconsistent slot states where possible, by not setting TTS_FLAG_SHOULDFREE until after the slot actually has a free'able tuple pointer, and by making sure that we reset tts_nvalid and related derived state before we replace the tuple contents. This would only matter if something were to examine the slot after we'd suffered some kind of error (e.g. out of memory) while manipulating the slot. We typically don't do that, so these changes might just be cosmetic --- but even if so, it seems like good future-proofing. Also remove some redundant Asserts, and add a couple for consistency. Back-patch to v12 where all this code was rewritten. Discussion: https://postgr.es/m/16095-c3ff2e5283b8dba5@postgresql.org |
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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/.