On Sun, Oct 18, 2009 at 10:37 AM, Ron Arts <r...@arts-betel.org> wrote: > Very true Simon, > > this has been the fastest way so far and I can do around > 350000 selects/second this way, using prepared statements > (on my machine at least), but I need more speed. > > That's why I want to skip the SQL processing entirely > and write a C function that reaches directly into the > internal memory structures to gets my record from there.
I might have missed the discussion, but... why don't you ditch SQLite and use something like Berkeley DB? Sounds to me you need a hash db instead of an rdbms, especially since you have no need for SQL. > > thanks, > Ron > > Simon Slavin schreef: >> On 18 Oct 2009, at 8:37am, Ron Arts wrote: >> >>> Is there a way to bypass the virtual machine altogether and reach >>> directly >>> into the btree and just retrieve one record by it's oid (primary >>> integer key), >>> and return it in a form that would allow taking out the column >>> values by name? >> >> The primary integer key column can always be referred to as the >> special name ROWID, even if you have assigned it a column name of your >> own. So you can do >> >> SELECT ROWID,myCol1,myCol2 FROM myTable >> >> as long as you don't explicitly declare a primary integer key column >> and then change the values in it. >> >> Simon. -- Puneet Kishor http://www.punkish.org Carbon Model http://carbonmodel.org Charter Member, Open Source Geospatial Foundation http://www.osgeo.org Science Commons Fellow, http://sciencecommons.org/about/whoweare/kishor Nelson Institute, UW-Madison http://www.nelson.wisc.edu ----------------------------------------------------------------------- Assertions are politics; backing up assertions with evidence is science ======================================================================= Sent from Madison, WI, United States _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
