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Currently, we only need this logic in order to cost a Bitmap Heap Scan. But a pending patch for Parallel Bitmap Heap Scan also uses it to help figure out how many workers to use for the scan, which has to be determined prior to costing. So, move the logic to a separate function to make that easier. Dilip Kumar. The patch series of which this is a part has been reviewed by Andres Freund, Amit Khendekar, Tushar Ahuja, Rafia Sabih, Haribabu Kommi, and me; it is not clear from the email discussion which of those people have looked specifically at this part. Discussion: http://postgr.es/m/CAFiTN-v3QYNJEZnnmKCeATuLbN-h9tMVfeEF0+BrouYDqjXgwg@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: http://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 http://www.postgresql.org/download/. For more information look at our web site located at http://www.postgresql.org/.