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670bf71f65
gist_poly_compress() and gist_circle_compress() checked for a NULL-pointer key argument, but that was dead code; the gist code never passes a NULL-pointer to the "compress" method. This commit also removes a documentation note added in commit a0a3883, about doing NULL-pointer checks in the "compress" method. It was added based on the fact that some implementations were doing NULL-pointer checks, but those checks were unnecessary in the first place. The NULL-pointer check in gbt_var_same() function was also unnecessary. The arguments to the "same" method come from the "compress", "union", or "picksplit" methods, but none of them return a NULL pointer. None of this is to be confused with SQL NULL values. Those are dealt with by the gist machinery, and are never passed to the GiST opclass methods. Michael Paquier
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.