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Self-join removal appears to be safe to apply with placeholder variables as long as we handle PlaceHolderVar in replace_varno_walker() and replace relid in phinfo->ph_lateral. Discussion: https://postgr.es/m/18187-831da249cbd2ff8e%40postgresql.org Author: Richard Guo Reviewed-by: Andrei Lepikhov
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/.