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This backwards-compatibility hack was introduced twenty years ago (in 8.2), and has surely been of no value for at least the last ten years. However, we shouldn't just leave it sit, because as was just pointed out it creates a dump/reload hazard: if it's set in the receiving environment then array contents will not be restored correctly. Other applications would likely be broken by it too, so whatever residual value it may have seems outweighed by the possibility of misuse. Our precedent for retiring some other comparable parameters, such as standard_conforming_strings, has been to leave the parameter in existence but force it to a fixed value. I judge however that that's not worth the trouble here, because there's no reason to believe that a non-negligible number of applications are either setting or reading this value. Let's just delete it in the master branch and be done with it. Bug: #19747 Reported-by: Ke <kehan5800@gmail.com> Author: Tom Lane <tgl@sss.pgh.pa.us> Reviewed-by: Laurenz Albe <laurenz.albe@cybertec.at> Discussion: https://postgr.es/m/19747-69b01e7fc190cd58@postgresql.org
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/.