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Commit dae761a87ed modified brin_page_items() to return the new "empty" flag for each BRIN range. But the new output parameter was added in the middle, which may cause crashes when using the new binary with old function definition. The ideal solution would be to introduce API versioning similar to what pg_stat_statements does, but it's too late for that as PG17 was already released (so we can't introduce a new extension version). We could do something similar in brin_page_items() by checking the number of output columns (and ignoring the new flag), but it doesn't seem very nice. Instead, simply error out and suggest updating the extension to the latest version. pageinspect is a superuser-only extension, and there's not much reason to run an older version. Moreover, there's a precedent for this approach in 691e8b2e18. Reported by Ľuboslav Špilák, investigation and patch by me. Backpatch to 17, same as dae761a87ed. Reported-by: Ľuboslav Špilák Reviewed-by: Michael Paquier, Hayato Kuroda, Peter Geoghegan Backpatch-through: 17 Discussion: https://postgr.es/m/VI1PR02MB63331C3D90E2104FD12399D38A5D2@VI1PR02MB6333.eurprd02.prod.outlook.com Discussion: https://postgr.es/m/flat/3385a58f-5484-49d0-b790-9a198a0bf236@vondra.me
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.