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Implementation of SQL property graph queries, according to SQL/PGQ standard (ISO/IEC 9075-16:2023). This adds: - GRAPH_TABLE table function for graph pattern matching - DDL commands CREATE/ALTER/DROP PROPERTY GRAPH - several new system catalogs and information schema views - psql \dG command - pg_get_propgraphdef() function for pg_dump and psql A property graph is a relation with a new relkind RELKIND_PROPGRAPH. It acts like a view in many ways. It is rewritten to a standard relational query in the rewriter. Access privileges act similar to a security invoker view. (The security definer variant is not currently implemented.) Starting documentation can be found in doc/src/sgml/ddl.sgml and doc/src/sgml/queries.sgml. Author: Peter Eisentraut <peter@eisentraut.org> Author: Ashutosh Bapat <ashutosh.bapat.oss@gmail.com> Reviewed-by: Junwang Zhao <zhjwpku@gmail.com> Reviewed-by: Ajay Pal <ajay.pal.k@gmail.com> Reviewed-by: Henson Choi <assam258@gmail.com> Discussion: https://www.postgresql.org/message-id/flat/a855795d-e697-4fa5-8698-d20122126567@eisentraut.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/.