On Aug 1, 2018, at 1:52 PM, Tim Streater <t...@clothears.org.uk> wrote: > > I don't use the pragma since, officially, they are unsupported.
“Unsupported” how? It’s documented and part of the SQLite file header, which is quite stable. If you mean this is not standard SQL and thus doesn’t work on non-SQLite DBs, then just do what we do, since we didn’t start out on SQLite: keep the schema version number in a separate file. You probably have some kind of preference file, or INI file, or registry key, or whatever associated with this software. Put it there if you don’t want to give it to SQLite to manage. > But I'd rather have the IF NOT EXISTS. That sounds wasteful. 99+% of the time, the column will exist, because it was created the first time the program was run after being upgraded. Imagine how many redundant SQL statements you’ll have to run on program startup a dozen years hence when you have maybe a hundred schema changes. I’ll stick by my advice: this is an upgrade-time operation only. After the software’s been successfully upgraded, the schema is stable and implicitly trustworthy, always. _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users
