To at least try increasing your version from 3.15 to 3.22 you can get pre-compiled binaries from the http://www.sqlite.org/download.html page. Go to the Precompiled Binaries for Windows section and there's a sqlite-tools which includes the Command Line Interface, and .dll's which you can put in your ...\PythonXX\DLLs (replacing the sqlite3.dll which is in there at the moment)
Then give it a whirl with either the CLI or the new dll in Python. In addition you can run "explain query plan blah" or the more detailed "explain blah" to get a view of what it's doing when it executes the statement "blah" -----Original Message----- From: sqlite-users [mailto:sqlite-users-boun...@mailinglists.sqlite.org] On Behalf Of Jonathan Moules Sent: Wednesday, March 21, 2018 2:17 PM To: sqlite-users@mailinglists.sqlite.org Subject: Re: [sqlite] How to optimise a somewhat-recursive query? Hi Richard, Simon Re: Compiling - I'm afraid I wouldn't really know where to begin. A quick google finds https://superuser.com/questions/146577/where-do-i-find-nmake-for-windows-7-x64 - but the answers/links there don't seem to work. I've got to go-out now but can take another look later and see if I can find a copy (Microsoft (I'm on Windows) never make it easy to find stuff). Simon - I suspected the ORDER BY thing was wrong but wanted to check first rather than simply come out with "SQLite is broken!". This may be related to the 3.22 regression I brought up a couple of days ago (and why I'm using 3.15) - probably why Dr H is suggesting I try his branch. I'm executing the query using SQLiteStudio (Or Python). Thanks, Jonathan On 2018-03-21 17:58, Richard Hipp wrote: > On 3/21/18, Jonathan Moules <jonathan-li...@lightpear.com> wrote: >> So, I'm back to being stuck on this. >> I have inserted 500,000 random urls (no extra lookups - still just >> 1000), and now the query (as per the below reply) is back to being >> somewhat slow (I'm using sqlite 3.15) at about 0.6s per request. > Do you have the ability to compile SQLite from canonical sources? If > so, please try again with the tip of the join-strength-reduction > branch (https://www.sqlite.org/src/timeline?r=join-strength-reduction). > > To compile on Windows: > > (1) Download a tarball or ZIP archive (or SQLite Archive) and unpack it. > (2) Run "nmake /f makefile.msc sqlite3.c" > > On unix: > > (1) Download and unpack as before > (2) ./configure; make sqlite3.c > > The only dependence for the above is having a "tclsh" somewhere on your $PATH. > _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users
