ae4569161a
When optimizer generates bitmap paths, it considers breaking OR-clause arguments one-by-one. But now, a group of similar OR-clauses can be transformed into SAOP during index matching. So, bitmap paths should keep up. This commit teaches bitmap paths generation machinery to group similar OR-clauses into dedicated RestrictInfos. Those RestrictInfos are considered both to match index as a whole (as SAOP), or to match as a set of individual OR-clause argument one-by-one (the old way). Therefore, bitmap path generation will takes advantage of OR-clauses to SAOP's transformation. The old way of handling them is also considered. So, there shouldn't be planning regression. Discussion: https://postgr.es/m/CAPpHfdu5iQOjF93vGbjidsQkhHvY2NSm29duENYH_cbhC6x%2BMg%40mail.gmail.com Author: Alexander Korotkov, Andrey Lepikhov Reviewed-by: Alena Rybakina, Andrei Lepikhov, Jian he, Robert Haas Reviewed-by: Peter Geoghegan
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/.