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The Alpha Software Forum Participation Guidelines

The Alpha Software Forum is a free forum created for Alpha Software Developer Community to ask for help, exchange ideas, and share solutions. Alpha Software strives to create an environment where all members of the community can feel safe to participate. In order to ensure the Alpha Software Forum is a place where all feel welcome, forum participants are expected to behave as follows:
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Bonus TIPS for Successful Posting

Try a Search First
It is highly recommended that a Search be done on your topic before posting, as many questions have been answered in prior posts. As with any search engine, the shorter the search term, the more "hits" will be returned, but the more specific the search term is, the greater the relevance of those "hits". Searching for "table" might well return every message on the board while "tablesum" would greatly restrict the number of messages returned.

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Variable scope with multiple users

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    Variable scope with multiple users

    Sorry if this is a daft question, but I have only used Alpha5 for standalone apps before.

    If I have the database on a server with several workstations linked to it, could one user overwrite the variables set by another user?

    For example:

    "User A" runs an operation that writes the value "A" into a variable, pending further operations.

    If "User B" runs the same operation, but writes the value "B" into the variable, will this overwite the value on "User A"'s PC?

    In other words, are operations run on each individual network PC or on the server?
    If computers are so clever how come someone as dumb as me has to tell them what to do?

    #2
    Re: Variable scope with multiple users

    Hi Paul

    My understanding is that each user is operating in their own unique environment (a session of sorts) and therefore any variables they use are unique to them.

    Regards

    Glen
    Glen Schild



    My Blog

    Comment


      #3
      Re: Variable scope with multiple users

      Thanks Glen,

      I thought this was probably the case - just needed confirmation ;)
      If computers are so clever how come someone as dumb as me has to tell them what to do?

      Comment


        #4
        Re: Variable scope with multiple users

        Variables reside in LOCAL memory space. The server is really just where the tables reside. Unless your users are actually executing on the server, you shouldn't have a problem.

        Tom

        Comment


          #5
          Re: Variable scope with multiple users

          Hi Tom,

          Originally posted by Tom Henkel View Post
          Unless your users are actually executing on the server, you shouldn't have a problem.
          And even if a user is executing on a server! Each copy of Alpha 5 running (whether on the same or different computers) has it's own memory and variables. There are no "computer wide" or "system wide" variables unless you store them in a file or table/dictionary and retrieve them from those places.

          To learn more, see my Variable Usage tips and also check out the link to Variable Scope at the bottom
          Regards,

          Ira J. Perlow
          Computer Systems Design


          CSDA A5 Products
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