Sytze, Firstly I would do like Paul suggests and split the unions up to catch data into three separate cursors curA, curB and curC then do a "select * from curA union all select * from curB ... into cursor curResult" etc. Doing it this way you can at least find out which select is taking the time using the rushmore settings that Jean detailed.
One thing to look at is the amount of deleted records you may/may not have in the tables. Your 500K records may be more if there are lots of deleted records you can't initially see because of your "set deleted" setting. Lots of deleted records in one section of the table really do screw up access times as the indexes become unbalanced. If this is the case then add an index on deleted() to the table. I have found, contrary to mainstream opinion that this dramatically improves SQL select access times despite the fact that it is well documented that it shouldn't. In addition as Jean also previously said change the syntax to be .. Date between trcask4 and trcask5 ... You can bet that the solution will be trivial and staring you in the face... it's always that way! Dave -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Sytze de Boer Sent: 12 September 2012 02:36 To: profox Subject: Speed I'm losing my mind over this At a client site, they run a report which can take 30 mins to generate, over the network When they run it on a local pc, it takes 5 secs Without boring you with all the details, essentially, the following code makes up the report *trcask4=a date *trcask5=a date Select Date,stockcode,stktype,invnum,qty,ttlamount,disc,ppb,cost,Desc, "H" As SRCE From winhst Where Between(Date,trcask4,trcask5) Union All; Select Date,stockcode,stktype,invnum,qty,ttlamount,disc,ppb,cost,Desc, "I" As SRCE From wininvs Where Between(Date,trcask4,trcask5) Union All ; Select Date,stockcode,stktype,invnum,qty,ttlamount,disc,ppb,cost,Desc, "J" As SRCE From wintime Where Between(Date,trcask4,trcask5) Into Table (myfile) The Winhst file has about 500,000 records The other 2 less than a 1000 combined There seems to be a big difference in time if no-ones else has logged into the app from a different workstation Can anyone suggest a way to make this go quicker? -- Kind regards Sytze de Boer Kiss Software --- StripMime Report -- processed MIME parts --- multipart/alternative text/plain (text body -- kept) text/html --- [excessive quoting removed by server] _______________________________________________ Post Messages to: [email protected] Subscription Maintenance: http://leafe.com/mailman/listinfo/profox OT-free version of this list: http://leafe.com/mailman/listinfo/profoxtech Searchable Archive: http://leafe.com/archives/search/profox This message: http://leafe.com/archives/byMID/profox/[email protected] ** All postings, unless explicitly stated otherwise, are the opinions of the author, and do not constitute legal or medical advice. This statement is added to the messages for those lawyers who are too stupid to see the obvious.
