Comments on: How To Prevent An SQR Program From Running Twice

By: administrator

administrator — Tue, 16 Jun 2009 23:47:44 +0000

Look around. The earlier blog entries have brain teasers, most of which were never solved. I’ll try to invent some more.

By: Sundeep Kumar

Sundeep Kumar — Tue, 16 Jun 2009 20:16:34 +0000

Yeah i enjoyed solving this riddle. Post some more riddles. I’ll Try solving them.

By: administrator

administrator — Tue, 16 Jun 2009 18:11:16 +0000

Thank you for responding to my brain teaser and welcome to my blog, Sundeep. Good solution – I hope you enjoyed working it out.

By: Sundeep Kumar

Sundeep Kumar — Tue, 16 Jun 2009 12:09:01 +0000

!Below is the Pseudo code of finding the election date.

Let #day = 1
Let $Find-Monday = ‘N’
While #day <8
Do Find-Monday
If $Find-Monday = ‘Y’
Break
End-If
Let #day = #day +1
End-While
$Election-Date = #day+1

Begin-Procedure Find-Monday
$Date_Char = ‘11/0′ || to_char(#day) || ‘/’ || $year
$Date = StrToDate($Date_Char,’MM/DD/YYYY’)
Begin-Select
to_char($Date,’D') &Day
If &Day = ‘2′
Let $Find-Monday = ‘Y’
End-If
End-Select
End-Procedure Find-Monday

By: administrator

administrator — Fri, 23 Jan 2009 06:28:15 +0000

Good question. This technique uses a database table maintained by the Peoplesoft Process Scheduler. It will detect any copy of the program that has been launched by Peoplesoft, no matter which file server is running the SQR program. Users should not have direct access to the pssqr.exe interpreter.

By: Bob Josephson

Bob Josephson — Fri, 23 Jan 2009 03:13:49 +0000

Very cool idea, checking whether the program is running or (even cooler) has run recently. But isn’t it an even more likely scenario that two different people, on different PCs, would run the same program? Forgive my ignorance (I’m more suited to writing a C/Java blog myself but does this SQR program run on the server or on clients? If the latter, you need to use a network resource for the lock.