• kdb+

  How to know if sym file for new update after .Q.en

  Posted by summer on March 24, 2022 at 12:00 am

  Hi,

  Is there any way to know if there is new update to sym file after .Q.en?

  Thank you

   

   

  summer replied 8 months, 1 week ago 2 Members · 1 Reply
• 1 Reply

• 

  pmallon

  Member

  March 24, 2022 at 12:00 am

  Hi,

  You should be able to check by the timestamp on the sym file:

   

  q).z.p 2022.03.24D13:36:35.138809000 
  q)t:([]s:`a`b`c) 
  q).Q.en[`:.]t s - a b c 
  q)ls -lrt sym "-rw-r--r-- 1 pat pat 14 Mar 24 13:36 sym" 
  q)/ add a sym to t 
  q)t:([]s:`a`b`c`d) 
  q).z.p 2022.03.24D13:37:20.140371000 
  q).Q.en[`:.]t s - a b c d 
  q)ls -lrt sym "-rw-r--r-- 1 pat pat 16 Mar 24 13:37 sym"

   

  If that doesn’t work for you, maybe a simply modified version like:

   

  q)modQen:{s:sym;.Q.en[x]y;sym except s} 
  q)t:([]s:`a`b`c`d`e) / add e to t 
  q)modQen[`:.;t] ,`e 
  q)/ run again to show no update to sym, .i.e empty list returned 
  q)modQen[`:.;t] `symbol$()

   

   

   

  Thanks,

  Patrick

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