Analysis of how enode starts up for an Oracle session

Idea being to plan what needs to be done for mysql/mariadb session

docs/enode.org

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+
+* Processes
+** Startup
+   - =(enode project)=
+     + =(enode-available-projects)=
+       * =(enode-get-projects)=
+         - =(load-file enode-projects-file)=
+       * =(enode-project-available project)=
+         - Test to see if (e.g.) =~/development/<project>/scripts/sql/<project>_ENODE.sql= exists
+     + =(setq enode-current-connection-type <connection-type-of-project>)=
+     + =(enode-start-engine)=
+       * =(enode-oracle-start-sql-engine)=
+         - =(call-interactively 'sql-oracle)=. The command-line option
+           set for =sqlplus= in the emacs customisation system include
+           =/nolog=, which leaves the need to connect to a database
+           until *after* the process has commenced.
+         - Set SQL buffer settings
+     + Open the =*_ENODE.sql= file for the project
+     + =(setq enode-up t)= to declare that enode has started.
+     + =(enode-connection)= called interactively
+       * =(enode-get-connections)=
+         - =(enode-load-connections-list)=
+           + =(load-file enode-connections-file)=
+       * =(enode-get-connections)=. As above.
+       * =(enode-add-new-connection connection-description)=
+         - =(enode-load-connections-list)=. As above.
+         - =(enode-get-connections)=. As above.
+         - Get attributes:
+           + =conn-user=: Username
+           + =conn-connection=: Database connection: modelled by Oracle's TNSNames details
+           + =conn-prompt=: a three-character designator to use as the SQL*Plus prompt.
+         - Add these details as a record in the =current-type-connections= list.
+         - Update =all-connections= with the new =current-type-connections= list.
+         - Update =enode-connections-file=.
+         - =(enode-load-connections-list)=. As above.
+       * =(enode-connect connection-description)=
+         - =(enode-get-connections)=. As above.
+         - Access and, maybe, set =enode-passwords-in-use=.
+         - =(enode-oracle-connect conn-user conn-pass conn-connection conn-prompt)=
+           + Issue the commands to the already-created iSQL session:
+             : connect <conn-user>/<conn-pass>@<conn-connection>
+             : set serverout on
+             : set sqlprompt "<conn-prompt>> "
+         - =(setq enode-currrent-connection connection-description)=
+         - =(setq enode-connected t)=