mirror of
https://github.com/postgres/postgres.git
synced 2025-07-07 00:36:50 +03:00
c09e5a6a01
For each Index AM, provide a mapping between operator strategies and the system-wide generic concept of a comparison type. For example, for btree, BTLessStrategyNumber maps to and from COMPARE_LT. Numerous places in the planner and executor think directly in terms of btree strategy numbers (and a few in terms of hash strategy numbers.) These should be converted over subsequent commits to think in terms of CompareType instead. (This commit doesn't make any use of this API yet.) Author: Mark Dilger <mark.dilger@enterprisedb.com> Reviewed-by: Peter Eisentraut <peter@eisentraut.org> Discussion: https://www.postgresql.org/message-id/flat/E72EAA49-354D-4C2E-8EB9-255197F55330@enterprisedb.com
The PostgreSQL contrib tree
---------------------------
This subtree contains porting tools, analysis utilities, and plug-in
features that are not part of the core PostgreSQL system, mainly
because they address a limited audience or are too experimental to be
part of the main source tree. This does not preclude their
usefulness.
User documentation for each module appears in the main SGML
documentation.
When building from the source distribution, these modules are not
built automatically, unless you build the "world" target. You can
also build and install them all by running "make all" and "make
install" in this directory; or to build and install just one selected
module, do the same in that module's subdirectory.
Some directories supply new user-defined functions, operators, or
types. To make use of one of these modules, after you have installed
the code you need to register the new SQL objects in the database
system by executing a CREATE EXTENSION command. In a fresh database,
you can simply do
CREATE EXTENSION module_name;
See the PostgreSQL documentation for more information about this
procedure.