2e606d75c0
The uuid type already has a full set of comparison operators and a btree operator class, so it is totally ordered. min() and max() were the only common aggregates missing for it. Add the uuid_larger() and uuid_smaller() support functions and register the min(uuid) and max(uuid) aggregates that use them. uuid values are compared lexicographically over their 128 bits. For UUIDv7, whose most significant bits encode a Unix timestamp, this coincides with chronological order, so min() and max() return the oldest and newest values. Bump catalog version. Author: Tristan Partin <tristan@partin.io> Reviewed-by: Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com> Reviewed-by: Zsolt Parragi <zsolt.parragi@percona.com> Reviewed-by: Masahiko Sawada <sawada.mshk@gmail.com> Discussion: https://postgr.es/m/DJGML0T9FCDV.3VA29JLODXEHZ@partin.io |
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| configure | ||
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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.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.