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· May 9, 2018

Question: Are there any restrictions on the number of SQL commands?

#Beginner #Object Data Model #SQL #Caché

Hello Global masters.

I am junior developer about Intersystems cache in South Korea.

I want to develop process management program on server.

My code :

TESTPID(IP)    ;
    #include %syPidtab
    Set Rset = ##class(%ResultSet).%New("%SYS.ProcessQuery:ListPids")
    d Rset.Execute()
    &sql(SELECT ClientIPAddress, Pid INTO :ClientIPAddress, :Pid
    FROM %SYS.ProcessQuery 
    WHERE ClientIPAddress = :IP)
    While Rset.Next() 
    {
​    i SQLCODE'=0 w !,"SQL Error "_SQLCODE continue ; 100 means process does not exist (halted)
    I Rset.GetData(1) = Pid D
    . w !,Rset.GetData(1)," ",ClientIPAddress," ",Pid
            //Set rs=$SYSTEM.Process.Terminate(Pid)
            //If rs'=1 {
            //    Write "Terminate Fialure "_" Pid "_Pid,!
            //}
            //Else {
            //    W "Sucess",!
        //    }
    //    }
    }
    d Rset.Close()
    Q

I made it and checked my process on portal and saw number of commands.

and it is over 1,000k.

 Are there any restrictions on the number of SQL commands?

I will use this code on server to manage process. if you guys have any good idea. please tell me about that

thank you for read my clumsy English

Discussion (5)0
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Robert Cemper · May 10, 2018

Welcome to the Caché world!

There is NO limit on commands to be executed !
Don't worry about the number. SQL is consuming a lot of commands.
And Class Queries in %SYS by its nature may even consume more than standard SQL queries.
Just during a quick check of your code example I passed 700k.

A general hint on programming style:
Pls. try to avoid Dot Style and use curly brackets instead. 
This is a very old notation. Not as old as Hieroglyphs, but almost smiley

What I mean. instead of

  I Rset.GetData(1) = Pid D
    . w !,Rset.GetData(1)," ",ClientIPAddress," ",Pid
            //Set rs=$SYSTEM.Process.Terminate(Pid)
            //If rs'=1 {
            //    Write "Terminate Fialure "_" Pid "_Pid,!
            //}
            //Else {
            //    W "Sucess",!
        //    }
    //    }

use 

  I Rset.GetData(1) = Pid {
     w !,Rset.GetData(1)," ",ClientIPAddress," ",Pid
            //Set rs=$SYSTEM.Process.Terminate(Pid)
            //If rs'=1 {
            //    Write "Terminate Fialure "_" Pid "_Pid,!
            //}
            //Else {
            //    W "Sucess",!
        //    }
    //    }
    }

 This makes it much easier for the audience to follow your code, and it is actual coding style,
 

0 0
Minsu Kim · May 10, 2018

Hello Mr. Cemper 

Thank you for accepting the Cache world! and solved my worried. :)

Hahahaha Yes!! I thought so but my co-woker who work in my office more than me wrote this style ( all of my co-wokers)

so I am learning the style. :'( (Because I have to understand my system's process and code)

I will try curly brackets in 1years but I need time to understand Cache object and my system's process :)

So, I will use this site as much as I can so please help me :)

thank you

Minsu.

p.s And can you tell me how can I improve my skill about cache object ?

I studied web(JAVA with spring framework), mySQL, oracle etc. 

It's too new to me.

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