27bc1772fc
Currently, there is just one algorithm for sampling tuples from a table written in acquire_sample_rows(). Custom table AM can just redefine the way to get the next block/tuple by implementing scan_analyze_next_block() and scan_analyze_next_tuple() API functions. This approach doesn't seem general enough. For instance, it's unclear how to sample this way index-organized tables. This commit allows table AM to encapsulate the whole sampling algorithm (currently implemented in acquire_sample_rows()) into the relation_analyze() API function. Discussion: https://postgr.es/m/CAPpHfdurb9ycV8udYqM%3Do0sPS66PJ4RCBM1g-bBpvzUfogY0EA%40mail.gmail.com Reviewed-by: Pavel Borisov, Matthias van de Meent |
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config | ||
contrib | ||
doc | ||
src | ||
.cirrus.star | ||
.cirrus.tasks.yml | ||
.cirrus.yml | ||
.dir-locals.el | ||
.editorconfig | ||
.git-blame-ignore-revs | ||
.gitattributes | ||
.gitignore | ||
aclocal.m4 | ||
configure | ||
configure.ac | ||
COPYRIGHT | ||
GNUmakefile.in | ||
HISTORY | ||
Makefile | ||
meson.build | ||
meson_options.txt | ||
README.md |
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/.