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Date:         Wed, 7 Jul 2010 16:06:26 -0400
Reply-To:     Arthur Tabachneck <art297@NETSCAPE.NET>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         Arthur Tabachneck <art297@NETSCAPE.NET>
Subject:      Re: Proc Delete Lives On In SAS Institure Code
Comments: To: Paul Choate REPRO NOACK <Paul.Choate@DDS.CA.GOV>

Paul,

But you can by combining a small bit of sql code and, between running the code and proc delete with a macro variable, it is still substantially faster than proc datasets. E.g.:

/* Create 100 files for test purposes */ %macro makefile; %do i=1 %to 100; data deleteme&i.; set sashelp.class; run; %end; %mend makefile;

%makefile /*use proc datasets to delete the files */ proc datasets; delete deleteme:; quit; NOTE: PROCEDURE DATASETS used (Total process time): real time 0.25 seconds cpu time 0.25 seconds

%makefile /*use proc sql and proc delete to delete the files */ proc sql noprint; select memname into :filelist separated by ' ' from dictionary.tables where libname="WORK" and substr(memname,1,8)="DELETEME"; quit; NOTE: PROCEDURE SQL used (Total process time): real time 0.03 seconds cpu time 0.03 seconds proc delete data=&filelist.; run; real time 0.15 seconds cpu time 0.15 seconds

Art -------- On Wed, 7 Jul 2010 12:27:10 -0700, Choate, Paul@DDS <Paul.Choate@DDS.CA.GOV> wrote:

>Missed this last week. Please excuse the late post. > >Proc delete doesn't allow wildcard colons! So if you have several datasets with a common suffix you can't sweep them all out in one. > >data help1 help2 help3 help4 help5 help6 help7 help8; > set sashelp.class; >run; > >/*isn't allowed*/ >proc delete data=help:; >run; > >/* minimal form? */ >proc delete data=help1 help2 help3 help4 help5 help6 help7 help8; >run; > >/* like magic */ >proc datasets; delete help:; >quit; > > >Paul Choate >DDS Data Extraction >(916) 654-2160 >-----Original Message----- >From: SAS(r) Discussion [mailto:SAS-L@LISTSERV.UGA.EDU] On Behalf Of Fehd, Ronald J. (CDC/OSELS/NCPHI) >Sent: Tuesday, June 29, 2010 10:16 AM >To: SAS-L@LISTSERV.UGA.EDU >Subject: Re: Proc Delete Lives On In SAS Institure Code > >http://www.sascommunity.org/wiki/PROC_Delete > >note which is faster: > >* proc datasets delete >* sql drop table >* proc delete <---<<< > >Ron Fehd the quicker is better maven > >> -----Original Message----- >> From: Nat Wooding >> Subject: Proc Delete lives on in SAS Institute Code >> >> >> Although Proc Delete long ago disappeared from SAS documentation, it >is >> occasionally referenced in threads on this list. For those who have >not >> seen >> it, the syntax is >> >> Proc Delete data = one; >> Run; >>


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