How to force old not calculated metadata to be calculated ?

[bitelxux]

Hi, I've set some metadata datapoints based on other datapoints, but new metadata is only applied for new datapoints values ...

How can I force mango to recalculate all allready past existing points medatada ?

[phildunlap]

There is a generate history button on the metapoint in the datasource page. Unfortunately, this button has some known issues associated with it, and may not work quite as expected.

I believe the best results with that button can be achieved by changing the meta point's update/logging information to be 1. run on context update and 2. log on change.

[bitelxux]

:-( can't find that button. Could you please tell me where exactly is suposed to be ?

[phildunlap]

In line with the data point on its data source page. The table should be:
Name --< Type --> Enable/Disable Button --> Generate History Button --> Edit Point Button

[bitelxux]

OK. Im' afraid ScadaBR fork doesn't have this feature :-(

Thank you !

[phildunlap]

You could theoretically perform this task with a scripting datasource. Say you have a need to generate the last 1000 points...

1. Add all the context points to your script as you would your meta point.
2. Write a big for loop, iterate i :

var dt = new Date();

for(var i = 1; i < 1000; ++i) {
pnt1 = point1.prev(MINUTE, i).firstValue;
...
pntN = pointN.prev(MINUTE, i).firstValue;
result = //do work on the pnt values
meta.set(result, dt.getTime()-(i*60*1000));
}

and you could just have it get generated in one run of the script. Not pretty, but it should work.

Note: This is for numeric points. Binaries and multistates would have a different solution.

[bitelxux]

It's good workaround. Thankyou