7467041cde
Commit 176dffdf7 added a NULL array pointer check before performing a qsort in order to prevent undefined behavior when passing NULL pointer and zero length. To head off future degenerate cases, check that there are at least two elements to sort before proceeding with insertion sort. This has the added advantage of allowing us to remove four equivalent checks that guarded against recursion/iteration. There might be a tiny performance penalty from unproductive recursions, but we can buy that back by increasing the insertion sort threshold. That is left for future work. Discussion: https://postgr.es/m/CANWCAZZWvds_35nXc4vXD-eBQa_=mxVtqZf-PM_ps=SD7ghhJg@mail.gmail.com
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/.