ab42d643c1
fc069a3a6319 implemented Self-Join Elimination (SJE) and put related logic to ChangeVarNodes_walker(). This commit provides refactoring to remove the SJE-related logic from ChangeVarNodes_walker() but adds a custom callback to ChangeVarNodesExtended(), which has a chance to process a node before ChangeVarNodes_walker(). Passing this callback to ChangeVarNodesExtended() allows SJE-related node handling to be kept within the analyzejoins.c. Reported-by: Richard Guo <guofenglinux@gmail.com> Discussion: https://postgr.es/m/CAMbWs49PE3CvnV8vrQ0Dr%3DHqgZZmX0tdNbzVNJxqc8yg-8kDQQ%40mail.gmail.com Author: Andrei Lepikhov <lepihov@gmail.com> Author: Alexander Korotkov <aekorotkov@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/.