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When to use table.open_session()

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  • jaryder
    Re: When to use table.open_session()

    Cal, Thanks for your input. I have not seen problems with what I have been doing so I will leave it for now. "Don't fix what is not broken."

    Leave a comment:

  • CALocklin
    Re: When to use table.open_session()

    I'm not sure what you should do but I can tell you how I do it and have been doing it for years - long before open_session() was available (hint, hint).

    I just use If I need to have it open twice, I simply assign a different pointer to it:
    tp1 ="MyTable")
    tp2 ="MyTable")

    For example, in at least one case I was using tp1 to enter new records while using tp2 to run some type of search. (I don't recall the details so don't ask why.)

    I've done this a few times and never had an issue. Consequently, I have no idea why there is a need for open_session(). There probably is a need for it but I haven't been able to figure out what that is. Perhaps if I was looking at records in both tables (rather than entering in one and looking in the other) it would be needed. Or, maybe it has something to do with active link tables???

    Leave a comment:

  • jaryder
    Re: When to use table.open_session()

    Thanks Stan, the code is more complicated then just a simple total. In the code below should I use table.open_session("artransaction") or"artransaction"). This function is called from a form that is associated to a set that includes arcustomer and artranaction with the transactions displaying in an embedded browse. This in my simplest function. I have several functions for other forms that I open a table that is already open on the form.

    'Date Created: 20-Feb-2009 04:14:09 PM
    'Last Updated: 04-May-2009 02:04:53 PM
    'Created By  : Jeff
    'Updated By  : Jeff
    FUNCTION GetCustomerAging as V (vAdate as d, byref vrCurrent as n, byref vrOver30 as n, byref vrOver60 as n, byref vrOver90 as n, byref vrOver120 as n)
    	dim vCptr as p = table.get("arcustomer")
    	dim vTptr as p ="artransaction",FILE_RO_SHARED)
    	dim vQptr as p
    	dim vID as n
    	dim vAgiang as p
    	dim vAge as n
    	vId =
    	'create query of all non-paid transactions
    	Query.Filter="customerid = VAR->vID .and. status != \"PD\""
    	'initialize counts
    	'total up customer aging
    	WHILE .not. vTptr.fetch_eof()
    		if vTptr.type != "P" then
       			vAge=vAdate - vTptr.duedate
       		end if
    			CASE vAge > 120
    				vrOver120 = vrOver120 + vTptr.balance
    			CASE vAge > 90 .and. vAge <= 120
    				vrOver90 = vrOver90 + vTptr.balance
    			CASE vAge > 60 .and. vAge <= 90
    				vrOver60 = vrOver60 + vTptr.balance
    			CASE vAge > 30 .and. vAge <= 60
    				vrOver30 = vrOver30 + vTptr.balance
    			CASE else
    				vrCurrent = vrCurrent + vTptr.balance

    Leave a comment:

  • Stan Mathews
    Re: When to use table.open_session()

    loop through all the transactions and does some type of totaling or whatever
    Don't need to open a table to get totals, etc.

    tablesum() and dbsum() will extract that info.

    Leave a comment:

  • jaryder
    started a topic When to use table.open_session()

    When to use table.open_session()

    Lets say I have a form that displays data from a set of 1 to many of customer to transactions and I have a button calling a function that opens a new copy of the transactions file to loop through all the transactions and does some type of totaling or whatever. In the function should I just use or should I use table.open_session()? Does it make a difference is I am just reading or reading and writing to the file?