a0dd0702e4
When converting the WHERE clause in an element pattern, generate_query_for_graph_path() calls replace_property_refs() to replace the property references in it. Only the current graph element pattern is passed as the context for replacement. If there are references to variables from other element patterns, it causes a segmentation fault (an assertion failure in an Assert enabled build) since it does not find path_element object corresponding to those variables. We do not support forward and backward variable references within a graph table clause. Hence prohibit all the cross references. Author: Ashutosh Bapat <ashutosh.bapat.oss@gmail.com> Reported-by: Man Zeng <zengman@halodbtech.com> Reviewed-by: Henson Choi <assam258@gmail.com> Reviewed-by: Junwang Zhao <zhjwpku@gmail.com> Discussion: https://www.postgresql.org/message-id/CAExHW5u6AoDfNg4%3DR5eVJn_bJn%3DC%3DwVPrto02P_06fxy39fniA%40mail.gmail.com |
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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/.