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Previously, the tests were structured so as all the queries whose plans are checked run first, followed by pattern checks using the full set of server logs. This can be problematic when extending the tests, as this increases query plan overlaps, where two tests finish by having similar plan outputs potentially invalidating the tests wanted. The tests are refactored so as log content matches are checked in isolation of each query run, by grabbing the position of the server logs before running each query whose plan is generated in the logs. This avoids issues when extending the tests, something that would become a larger problem with a follow-up patch that adds a new GUC in auto_explain to control the size of the each parameter logged. Author: Dagfinn Ilmari Mannsåker Discussion: https://postgr.es/m/87ee09mohb.fsf@wibble.ilmari.org
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.