postgresql_11: remove

As described in the release lifecycle docs from postgresql[1], v11 will
stop receiving fixes as of Nov 9 2023. This means it's EOL throughout
the entire lifetime of 23.11, so let's drop it now.

A lot of examples are also referencing postgresql_11. Where it's
sensible, use postgresql_15 as example now to avoid confusion.

This is also handy because the LLVM 16 fix for postgresql is not
available for postgresql 11 ;-)

[1] https://www.postgresql.org/support/versioning/

nixos/doc/manual/release-notes/rl-2311.section.md

···
 
   If you use this feature, updates to CoreDNS may require updating `vendorHash` by following these steps again.
 
+- `postgresql_11` has been removed since it'll stop receiving fixes on November 9 2023.
+
 - `ffmpeg` default upgraded from `ffmpeg_5` to `ffmpeg_6`.
 
 - `fusuma` now enables the following plugins: [appmatcher](https://github.com/iberianpig/fusuma-plugin-appmatcher), [keypress](https://github.com/iberianpig/fusuma-plugin-keypress), [sendkey](https://github.com/iberianpig/fusuma-plugin-sendkey), [tap](https://github.com/iberianpig/fusuma-plugin-tap) and [wmctrl](https://github.com/iberianpig/fusuma-plugin-wmctrl).

nixos/modules/services/backup/postgresql-wal-receiver.nix

···
     options = {
       postgresqlPackage = mkOption {
         type = types.package;
-        example = literalExpression "pkgs.postgresql_11";
+        example = literalExpression "pkgs.postgresql_15";
         description = lib.mdDoc ''
           PostgreSQL package to use.
         '';
···
         example = literalExpression ''
           {
             main = {
-              postgresqlPackage = pkgs.postgresql_11;
+              postgresqlPackage = pkgs.postgresql_15;
               directory = /mnt/pg_wal/main/;
               slot = "main_wal_receiver";
               connection = "postgresql://user@somehost";

nixos/modules/services/databases/postgresql.md

···
 To enable PostgreSQL, add the following to your {file}`configuration.nix`:
 ```
 services.postgresql.enable = true;
-services.postgresql.package = pkgs.postgresql_11;
+services.postgresql.package = pkgs.postgresql_15;
 ```
-Note that you are required to specify the desired version of PostgreSQL (e.g. `pkgs.postgresql_11`). Since upgrading your PostgreSQL version requires a database dump and reload (see below), NixOS cannot provide a default value for [](#opt-services.postgresql.package) such as the most recent release of PostgreSQL.
+Note that you are required to specify the desired version of PostgreSQL (e.g. `pkgs.postgresql_15`). Since upgrading your PostgreSQL version requires a database dump and reload (see below), NixOS cannot provide a default value for [](#opt-services.postgresql.package) such as the most recent release of PostgreSQL.
 
 <!--
 After running {command}`nixos-rebuild`, you can verify
···
 
 ## Plugins {#module-services-postgres-plugins}
 
-Plugins collection for each PostgreSQL version can be accessed with `.pkgs`. For example, for `pkgs.postgresql_11` package, its plugin collection is accessed by `pkgs.postgresql_11.pkgs`:
+Plugins collection for each PostgreSQL version can be accessed with `.pkgs`. For example, for `pkgs.postgresql_15` package, its plugin collection is accessed by `pkgs.postgresql_15.pkgs`:
 ```ShellSession
 $ nix repl '<nixpkgs>'
 
 Loading '<nixpkgs>'...
 Added 10574 variables.
 
-nix-repl> postgresql_11.pkgs.<TAB><TAB>
-postgresql_11.pkgs.cstore_fdw        postgresql_11.pkgs.pg_repack
-postgresql_11.pkgs.pg_auto_failover  postgresql_11.pkgs.pg_safeupdate
-postgresql_11.pkgs.pg_bigm           postgresql_11.pkgs.pg_similarity
-postgresql_11.pkgs.pg_cron           postgresql_11.pkgs.pg_topn
-postgresql_11.pkgs.pg_hll            postgresql_11.pkgs.pgjwt
-postgresql_11.pkgs.pg_partman        postgresql_11.pkgs.pgroonga
+nix-repl> postgresql_15.pkgs.<TAB><TAB>
+postgresql_15.pkgs.cstore_fdw        postgresql_15.pkgs.pg_repack
+postgresql_15.pkgs.pg_auto_failover  postgresql_15.pkgs.pg_safeupdate
+postgresql_15.pkgs.pg_bigm           postgresql_15.pkgs.pg_similarity
+postgresql_15.pkgs.pg_cron           postgresql_15.pkgs.pg_topn
+postgresql_15.pkgs.pg_hll            postgresql_15.pkgs.pgjwt
+postgresql_15.pkgs.pg_partman        postgresql_15.pkgs.pgroonga
 ...
 ```
 
 To add plugins via NixOS configuration, set `services.postgresql.extraPlugins`:
 ```
-services.postgresql.package = pkgs.postgresql_11;
-services.postgresql.extraPlugins = with pkgs.postgresql_11.pkgs; [
+services.postgresql.package = pkgs.postgresql_12;
+services.postgresql.extraPlugins = with pkgs.postgresql_12.pkgs; [
   pg_repack
   postgis
 ];
···
 You can build custom PostgreSQL-with-plugins (to be used outside of NixOS) using function `.withPackages`. For example, creating a custom PostgreSQL package in an overlay can look like:
 ```
 self: super: {
-  postgresql_custom = self.postgresql_11.withPackages (ps: [
+  postgresql_custom = self.postgresql_12.withPackages (ps: [
     ps.pg_repack
     ps.postgis
   ]);
···
 Here's a recipe on how to override a particular plugin through an overlay:
 ```
 self: super: {
-  postgresql_11 = super.postgresql_11.override { this = self.postgresql_11; } // {
-    pkgs = super.postgresql_11.pkgs // {
-      pg_repack = super.postgresql_11.pkgs.pg_repack.overrideAttrs (_: {
+  postgresql_15 = super.postgresql_15.override { this = self.postgresql_15; } // {
+    pkgs = super.postgresql_15.pkgs // {
+      pg_repack = super.postgresql_15.pkgs.pg_repack.overrideAttrs (_: {
         name = "pg_repack-v20181024";
         src = self.fetchzip {
           url = "https://github.com/reorg/pg_repack/archive/923fa2f3c709a506e111cc963034bf2fd127aa00.tar.gz";

nixos/modules/services/databases/postgresql.nix

···
 
       package = mkOption {
         type = types.package;
-        example = literalExpression "pkgs.postgresql_11";
+        example = literalExpression "pkgs.postgresql_15";
         description = lib.mdDoc ''
           PostgreSQL package to use.
         '';
···
       dataDir = mkOption {
         type = types.path;
         defaultText = literalExpression ''"/var/lib/postgresql/''${config.services.postgresql.package.psqlSchema}"'';
-        example = "/var/lib/postgresql/11";
+        example = "/var/lib/postgresql/15";
         description = lib.mdDoc ''
           The data directory for PostgreSQL. If left as the default value
           this directory will automatically be created before the PostgreSQL server starts, otherwise
···
       extraPlugins = mkOption {
         type = types.listOf types.path;
         default = [];
-        example = literalExpression "with pkgs.postgresql_11.pkgs; [ postgis pg_repack ]";
+        example = literalExpression "with pkgs.postgresql_15.pkgs; [ postgis pg_repack ]";
         description = lib.mdDoc ''
           List of PostgreSQL plugins. PostgreSQL version for each plugin should
           match version for `services.postgresql.package` value.
···
         default = {};
         description = lib.mdDoc ''
           PostgreSQL configuration. Refer to
-          <https://www.postgresql.org/docs/11/config-setting.html#CONFIG-SETTING-CONFIGURATION-FILE>
+          <https://www.postgresql.org/docs/15/config-setting.html#CONFIG-SETTING-CONFIGURATION-FILE>
           for an overview of `postgresql.conf`.
 
           ::: {.note}
···
         base = if versionAtLeast config.system.stateVersion "23.11" then pkgs.postgresql_15
             else if versionAtLeast config.system.stateVersion "22.05" then pkgs.postgresql_14
             else if versionAtLeast config.system.stateVersion "21.11" then pkgs.postgresql_13
-            else if versionAtLeast config.system.stateVersion "20.03" then pkgs.postgresql_11
+            else if versionAtLeast config.system.stateVersion "20.03" then mkThrow "11"
             else if versionAtLeast config.system.stateVersion "17.09" then mkThrow "9_6"
             else mkThrow "9_5";
     in

pkgs/applications/misc/glom/default.nix

···
 , isocodes
 , gtksourceview
 , gtksourceviewmm
-, postgresql_11
+, postgresql_15
 , gobject-introspection
 , yelp-tools
 , wrapGAppsHook
···
     python3.pkgs.pygobject3
     gtksourceview
     gtksourceviewmm
-    postgresql_11 # for pg_config
+    postgresql_15 # for pg_config
   ];
 
   enableParallelBuilding = true;

pkgs/servers/sql/postgresql/default.nix

···
   };
 
   mkPackages = self: {
-    # TODO: remove ahead of 23.11 branchoff
-    # "PostgreSQL 11 will stop receiving fixes on November 9, 2023"
-    postgresql_11 = self.callPackage generic {
-      version = "11.21";
-      psqlSchema = "11.1"; # should be 11, but changing it is invasive
-      hash = "sha256-B7CDdHHV3XeyUWazRxjzuhCBa2rWHmkeb8VHzz/P+FA=";
-      this = self.postgresql_11;
-      thisAttr = "postgresql_11";
-      inherit self;
-    };
-
     postgresql_12 = self.callPackage generic {
       version = "12.16";
       psqlSchema = "12";

pkgs/top-level/all-packages.nix

···
   timescaledb-tune = callPackage ../development/tools/database/timescaledb-tune { };
 
   inherit (import ../servers/sql/postgresql pkgs)
-    postgresql_11
     postgresql_12
     postgresql_13
     postgresql_14
     postgresql_15
     postgresql_16
 
-    postgresql_11_jit
     postgresql_12_jit
     postgresql_13_jit
     postgresql_14_jit
···
   postgresql_jit = postgresql_15_jit.override { this = postgresql_jit; };
   postgresqlPackages = recurseIntoAttrs postgresql.pkgs;
   postgresqlJitPackages = recurseIntoAttrs postgresql_jit.pkgs;
-  postgresql11Packages = recurseIntoAttrs postgresql_11.pkgs;
   postgresql12Packages = recurseIntoAttrs postgresql_12.pkgs;
   postgresql13Packages = recurseIntoAttrs postgresql_13.pkgs;
   postgresql14Packages = recurseIntoAttrs postgresql_14.pkgs;
   postgresql16Packages = recurseIntoAttrs postgresql_16.pkgs;
-  postgresql11JitPackages = recurseIntoAttrs postgresql_11_jit.pkgs;
   postgresql12JitPackages = recurseIntoAttrs postgresql_12_jit.pkgs;
   postgresql13JitPackages = recurseIntoAttrs postgresql_13_jit.pkgs;
   postgresql14JitPackages = recurseIntoAttrs postgresql_14_jit.pkgs;