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BufferGetPage() already returns type Page, so casting it to Page doesn't achieve anything. A sizable number of call sites does this casting; remove that. This was already done inconsistently in the code in the first import in 1996 (but didn't exist in the pre-1995 code), and it was then apparently just copied around. Author: Kirill Reshke <reshkekirill@gmail.com> Reviewed-by: Chao Li <li.evan.chao@gmail.com> Reviewed-by: Richard Guo <guofenglinux@gmail.com> Reviewed-by: Álvaro Herrera <alvherre@kurilemu.de> Reviewed-by: Peter Eisentraut <peter@eisentraut.org> Discussion: https://www.postgresql.org/message-id/flat/CALdSSPgFhc5=vLqHdk-zCcnztC0zEY3EU_Q6a9vPEaw7FkE9Vw@mail.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.