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Datum sorts can be significantly faster than tuple sorts, especially when the data type being sorted is a pass-by-value type. Something in the region of 50-70% performance improvements appear to be possible. Just in case there's any confusion; the Datum sort is only used when the targetlist of the Sort node contains a single column, not when there's a single column in the sort key and multiple items in the target list. Author: Ronan Dunklau Reviewed-by: James Coleman, David Rowley, Ranier Vilela, Hou Zhijie Tested-by: John Naylor Discussion: https://postgr.es/m/3177670.itZtoPt7T5@aivenronan
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/.