6dfce8420e
Due to an off-by-one error, the code failed to find matches at the end of the haystack. Fix by rewriting the loop. While at it, fix a comment that claimed that the function could find a zero-length match. Such a match could send a caller into an endless loop. However, zero-length matches only make sense with an empty search string, and that case is explicitly excluded by all callers. To make sure it stays that way, add an Assert and a comment. Bug: #19341 Reported-by: Adam Warland <adam.warland@infor.com> Author: Laurenz Albe <laurenz.albe@cybertec.at> Reviewed-by: Heikki Linnakangas <hlinnaka@iki.fi> Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us> Discussion: https://postgr.es/m/19341-1d9a22915edfec58@postgresql.org Backpatch-through: 18
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/.