5457ea46d1
This flag was effectively a no-op in EXEC_BACKEND (ie, Windows) builds, because it was kept in the process-local HTAB struct, and it could only ever become set in the postmaster's copy. The simplest fix is to move it to the shared HASHHDR struct. We could keep a copy in HTAB as well, as we do with keysize and some other fields, but the "too much contention" argument doesn't seem to apply here: we only examine isfixed during element_alloc(), which had better not get hit very often for a shared hashtable. This oversight dates to 7c797e719 which invented the option. But back-patching doesn't seem appropriate given the lack of field complaints. If there is anyone running an affected workload on Windows, they might be unhappy about the behavior changing in a minor release. Author: Aidar Imamov <a.imamov@postgrespro.ru> Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us> Discussion: https://postgr.es/m/4d0cb35ff01c5c74d2b9a582ecb73823@postgrespro.ru
PostgreSQL Database Management System
This directory contains the source code distribution of the PostgreSQL database management system.
PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.