我目前需要添加到每次用户单击更新其任何信息的程序上的“保存”按钮时更新的表。 当任何字段被修改时，为了我们有更改日志，我需要在“slinfo”表上创建一条记录，包括：
Customer name (slinfo.name)
Customer account (slinfo.acode)
The date (slinfo.date)
And slinfo.seq, which is the sequence number for each change.
我将如何去做这样的事情？
【问题讨论】：
标签： openedge progress-4gl
/* presumably you already have a save trigger to save the amended values
* this code should go in that trigger, probably at the end
*/
/* I, obviously, have no way to know where the actual values for
* these variables are supposed to come from. if the logic for
* that is simple enough you might even be able to eliminate the variables
*/
define variable nameVariable as character no-undo.
define variable acodeVariable as character no-undo. /* I'm guessing that this is a character field */
define variable seqVariable as integer no-undo.
/* do something to populate the variables...
*/
/* since you are apparently already saving changes to slinfo
* you just need to add a few fields
*/
assign
slinfo.name = nameVariable
slinfo.acode = acodeVariable
slinfo.date = today
slinfo.seq = seqVariable
.
【讨论】：
您可以访问 trigger also 语句中的旧字段值和新字段值
简单的写程序：
CREATE slinfo.
ASSIGN
slinfo.name = Customer.NAME
slinfo.acode = Customer.account
slinfo.date = TODAY
slinfo.seq = NEXT-VALUE(seqSlinfo)
.
【讨论】：