cbef472558
They are not and never have been used by any known code -- apparently we just cargo-culted them in commit 37484ad2aace (or their ancestor macros anyway, which begat these functions in commit 34694ec888d6). Allegedly they're also potentially dangerous; users are better off going through HeapTupleSetHintBits instead. Author: Andy Fan <zhihuifan1213@163.com> Discussion: https://postgr.es/m/87sejogt4g.fsf@163.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/.