mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-08-23 21:07:19 +02:00
c8ba697a4b
Every time the best-tuple-found-so-far changes, we need to reset all the penalty values in which_grow[] to the penalties for the new best tuple. The old code failed to do this, resulting in inferior index quality. The original patch from Alexander Korotkov was just two lines; I took the liberty of fleshing that out by adding a bunch of comments that I hope will make this logic easier for others to understand than it was for me. |
||
|---|---|---|
| config | ||
| contrib | ||
| doc | ||
| src | ||
| .gitignore | ||
| aclocal.m4 | ||
| configure | ||
| configure.in | ||
| COPYRIGHT | ||
| GNUmakefile.in | ||
| Makefile | ||
| README | ||
| README.git | ||
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. Changes between all PostgreSQL releases are recorded in the file HISTORY. 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/.