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There are a number of rather subtle points about the behavior of this code, which its original authors did not deign to document. Try to improve that. In particular, explain how internal and leaf keys can differ and what the restrictions are on that. This work arose from trying to fix some bugs, and in the process I believe I've identified some more, but this patch does not attempt to fix anything, only document it. I did make a few purely cosmetic code changes, such as removing dead (and confusing!) initializations of variables and choosing more appropriate types for some pointers. Author: Tom Lane <tgl@sss.pgh.pa.us> Reviewed-by: Ayush Tiwari <ayushtiwari.slg01@gmail.com> Discussion: https://postgr.es/m/AH*AvQCYKhQGVvPWi1GiU4oY.8.1781609375063.Hmail.3020001251@tju.edu.cn
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/.