Yes, if you write MAL "by hand" (or have some program create it) that does explicitly call a MAL optimizer, that MAL optimizer is indeed used to optimize the MAL code according to its very purpose.
Stefan On Wed, Aug 11, 2010 at 03:49:47PM +0800, kun ren wrote: > It is only used by SQL? and how to designation the optimiser？but when I > write MAL,for example, > i:=0; > b:= "done"; > barrier go:= true; > c:=i+1; > d:="step"; > v:=d; > io.print(v); > i:=c; > redo go:= i<2; > exit go; > io.print(b); > optimizer.aliasRemoval(); > > the last optimizer.aliasRemoval() is used for optimizing? > > 2010/8/11 Fabian Groffen <[email protected]> > > > On 11-08-2010 15:25:15 +0800, kun ren wrote: > > > Recently,I am intersting in MAL optimize，and have read the manual of > > the > > > MAL optimize, but it is so long, Possible if we want to use mal optimize > > ,we > > > must degignation the optimize consideration, such as alias removal, > > > constant expression,join path optimizer;And then I dedug the MonetDB,but > > > default it don't use any optimize.so what do you think about the mal > > > optimize? > > > > It is only used when you use SQL. The sql_optimizer setting in > > monetdb5.conf controls which optimisers are run, which by default are > > quite a few. > > > > > > ------------------------------------------------------------------------------ > > This SF.net email is sponsored by > > > > Make an app they can't live without > > Enter the BlackBerry Developer Challenge > > http://p.sf.net/sfu/RIM-dev2dev > > _______________________________________________ > > Monetdb-developers mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/monetdb-developers > > > ------------------------------------------------------------------------------ > This SF.net email is sponsored by > > Make an app they can't live without > Enter the BlackBerry Developer Challenge > http://p.sf.net/sfu/RIM-dev2dev > _______________________________________________ > Monetdb-developers mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/monetdb-developers -- | Dr. Stefan Manegold | mailto:[email protected] | | CWI, P.O.Box 94079 | http://www.cwi.nl/~manegold/ | | 1090 GB Amsterdam | Tel.: +31 (20) 592-4212 | | The Netherlands | Fax : +31 (20) 592-4199 | ------------------------------------------------------------------------------ This SF.net email is sponsored by Make an app they can't live without Enter the BlackBerry Developer Challenge http://p.sf.net/sfu/RIM-dev2dev _______________________________________________ Monetdb-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/monetdb-developers
