adaf34241a
Commit 1cc29fe7c, which taught EXPLAIN to print PARAM_EXEC Params as the referenced expressions, included some checks to prevent matching Params found in SubPlans or InitPlans to NestLoopParams of upper query levels. At the time, this seemed possibly necessary to avoid false matches because of the planner's habit of re-using the same PARAM_EXEC slot in multiple places in a plan. Furthermore, in the absence of LATERAL no such reference could be valid anyway. But it's possible now that we have LATERAL, and in the wake of 46c508fbc and 1db5667ba I believe the false-match hazard is gone. Hence, remove the in_same_plan_level checks. As shown in the regression test changes, this provides a useful improvement in readability for EXPLAIN of LATERAL-using subplans. Richard Guo, reviewed by Greg Stark and myself Discussion: https://postgr.es/m/CAMbWs4-YSOcQXAagJetP95cAeZPqzOy5kM5yijG0PVW5ztRb4w@mail.gmail.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. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download/ See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.