0fd1609afe
The unnest() test introduced in 0ee83dd4a9 did not produce a
deterministic EXPLAIN plan output.
The two sides of this test's nested loop join cost about the same, so
which one ended up as the outer wasn't stable and could flip between
platforms.
Use an equality predicate on ft1.c3 instead of a range one. That
restricts ft1 to a single row, so it's clearly the outer of the nested
loop and the Materialize on the inner side goes away, giving a stable
plan.
Author: Sami Imseih <samimseih@gmail.com>
Reviewed-by: Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>
Discussion: https://postgr.es/m/CAA5RZ0uC%3DGOihOKcF7o3JVETF3e-Fkc4OUO5NbqMEKCTeSN-dQ%40mail.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.
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/.