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replace_property_refs() called expression_tree_mutator() with the root of the expression tree as the input node. But expression_tree_mutator() does not call the mutator function on the root node, so the root node remains unchanged. If the root node is a property reference or a lateral reference -- the two node kinds that replace_property_refs_mutator() rewrites -- it is returned unchanged. Modules after the rewriter do not know about property reference nodes, resulting in "ERROR: unrecognized node type: 63". Since varlevelsup of lateral references is not incremented, they are not resolved correctly in the planner, leading to many different symptoms. Fix this by calling replace_property_refs_mutator() directly from replace_property_refs(), similar to how other mutator functions do. The only case when a property reference or a lateral reference can be the root of a GRAPH_TABLE expression tree is when it is a bare property reference or a bare lateral reference in the WHERE clause. The COLUMNS clause is passed to replace_property_refs() as a targetlist. Every other expression has at least one expression node covering the property reference or a lateral reference in the expression tree. That explains why this bug was not seen so far. Author: Ashutosh Bapat <ashutosh.bapat.oss@gmail.com> Reported-by: Noah Misch <noah@leadboat.com> Discussion: https://www.postgresql.org/message-id/flat/20260630173053.51.noahmisch%40microsoft.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.
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