f96c2c7278
checkWellFormedRecursion would issue "missing recursive reference" if a WITH RECURSIVE query contained a single self-reference but that self-reference was inside a top-level WITH, ORDER BY, LIMIT, etc, rather than inside the second arm of the UNION as expected. We already intended to throw more-on-point errors for such cases, but those error checks must be done before examining the UNION arm in order to have the desired results. So this patch need only move some code (and improve the comments). Per bug #18536 from Alexander Lakhin. Back-patch to all supported branches. Discussion: https://postgr.es/m/18536-0a342ec07901203e@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/.