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b073c3ccd0
This switches the default ACL to what the documentation has recommended since CVE-2018-1058. Upgrades will carry forward any old ownership and ACL. Sites that declined the 2018 recommendation should take a fresh look. Recipes for commissioning a new database cluster from scratch may need to create a schema, grant more privileges, etc. Out-of-tree test suites may require such updates. Reviewed by Peter Eisentraut. Discussion: https://postgr.es/m/20201031163518.GB4039133@rfd.leadboat.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.