On Fri, 18 Nov 2016 19:20:06 +0000 David Raymond <david.raym...@tomtom.com> wrote:
> I've got a query that I've tried a few times here that seems like > it's hanging up on something and I'm wondering if it's just some > brain dead thing I'm forgetting or doing wrong. > > I've got a database with a bunch of records, and am trying to > populate a table in another database with coordinate extremes for > each state. Using the CLI I open up the side database, attach the > main one and run > > insert into coordExtremes select State, min(Latitude), max(Latitude), > min(Longitude), max(Longitude) from foo.bar group by State; > > Twice I've left that running overnight and it's still been sitting > there not completed the next day when I came in. I gave up on using > the CLI to do it and wrote a quick Python script to scan through the > whole big table once and keep track of the extremes, and it finished > in all of 15 minutes. So I'm left scratching my head as to what's up. > If anyone can think of something or sees where I'm being an idiot, > please let me know. Is python using bigger cache? Increase cache with pragma in CLI. Set it to 100-500MB for foo db, don't need to waste cache on destiny db (where you insert the data). Change foo with the real origin db name. pragma foo.cache_size=-500000 Why don't use R*Tree virtual table? http://www.sqlite.org/rtree.html --- --- Eduardo Morras <emorr...@yahoo.es> _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users
