Re: Sequential search of indexed field
I deleted the index file and recreated it, and now it works as expected :) PB On Thu, 15 Aug 2019 at 21:09, John DeSoi via 4D_Tech <4d_tech@lists.4d.com> wrote: > Seems way off. Are the values unique or clustered around a few values? > > I'm seeing a few milliseconds to search 46 million records with a unique > index value. > > Have you tried DESCRIBE QUERY EXECUTION? > > John DeSoi, Ph.D. > > > On Aug 15, 2019, at 2:26 PM, Pat Bensky via 4D_Tech < > 4d_tech@lists.4d.com> wrote: > > > > There are a lot of records in the table (about 1.3 million). > > > > Does this seem right? 70 seconds is a long time :) And why does it say > it's > > doing a *sequential* search? > > ** > 4D Internet Users Group (4D iNUG) > Archive: http://lists.4d.com/archives.html > Options: https://lists.4d.com/mailman/options/4d_tech > Unsub: mailto:4d_tech-unsubscr...@lists.4d.com > ** -- * CatBase - Top Dog in Data Publishing tel: +44 (0) 207 118 7889 w: http://www.catbase.com skype: pat.bensky * ** 4D Internet Users Group (4D iNUG) Archive: http://lists.4d.com/archives.html Options: https://lists.4d.com/mailman/options/4d_tech Unsub: mailto:4d_tech-unsubscr...@lists.4d.com **
Re: Sequential search of indexed field
Seems way off. Are the values unique or clustered around a few values? I'm seeing a few milliseconds to search 46 million records with a unique index value. Have you tried DESCRIBE QUERY EXECUTION? John DeSoi, Ph.D. > On Aug 15, 2019, at 2:26 PM, Pat Bensky via 4D_Tech <4d_tech@lists.4d.com> > wrote: > > There are a lot of records in the table (about 1.3 million). > > Does this seem right? 70 seconds is a long time :) And why does it say it's > doing a *sequential* search? ** 4D Internet Users Group (4D iNUG) Archive: http://lists.4d.com/archives.html Options: https://lists.4d.com/mailman/options/4d_tech Unsub: mailto:4d_tech-unsubscr...@lists.4d.com **
Sequential search of indexed field
Using v17. I need to find out if a certain entry exists in a large table. The search is conducted on an indexed field (longint). I've tested with two methods: a) Query *SET QUERY DESTINATION*(Into variable;$iCount) *QUERY*(*Table*($iTableNumber)->;$FieldPtr->=[TableTemplates]RecordNumber) - query takes 66 seconds b) Find in field *Find in field*($FieldPtr->;[TableTemplates]RecordNumber) - takes 70 seconds (no match is found) It makes very little difference what type of index is selected for the field. There are a lot of records in the table (about 1.3 million). Does this seem right? 70 seconds is a long time :) And why does it say it's doing a *sequential* search? Pat -- * CatBase - Top Dog in Data Publishing tel: +44 (0) 207 118 7889 w: http://www.catbase.com skype: pat.bensky * ** 4D Internet Users Group (4D iNUG) Archive: http://lists.4d.com/archives.html Options: https://lists.4d.com/mailman/options/4d_tech Unsub: mailto:4d_tech-unsubscr...@lists.4d.com **
