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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>