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Commit bbc1376b39627c6bddd8a0dc0a7dda24c91a97a0 checked that if a redirected line pointer pointed to a tuple, the tuple should be marked both HEAP_ONLY_TUPLE and HEAP_UPDATED. But Andres Freund pointed out that *any* tuple that is marked HEAP_ONLY_TUPLE should be marked HEAP_UPDATED, not just one that is the target of a redirected line pointer. Do that instead. To see why this is better, consider a redirect line pointer A which points to a heap-only tuple B which points (via CTID) to another heap-only tuple C. With the old code, we'd complain if B was not marked HEAP_UPDATED, but with this change, we'll complain if either B or C is not marked HEAP_UPDATED. (Note that, with or without this commit, if either B or C were not marked HEAP_ONLY_TUPLE, we would also complain about that.) Discussion: http://postgr.es/m/CA%2BTgmobLypZx%3DcOH%2ByY1GZmCruaoucHm77A6y_-Bo%3Dh-_3H28g%40mail.gmail.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.