TmemTable has not onCalcFields event?

[dpap]

I want to use a TMemTable for temporary record storing but, as I saw, doesn't exist a onCalcFields. Is there a similar memTable (or can I add) this event?

[Zvoni]

I want to use a TMemTable for temporary record storing but, as I saw, doesn't exist a onCalcFields. Is there a similar memTable (or can I add) this event?

There is no TMemTable.
Do you mean TMemDataset?

And why would you expect an OnCalcFields-Event?
https://wiki.freepascal.org/TMemDataset (Yes, i know: Wiki is not Documentation, but i was too lazy to search further)

A TMemDataset descendant acts like a cursor on a table or query-result.

There are no calculated fields in a QUERY-RESULT

[dpap]

Yes, I mean TmemDataset. I want to have some fields in the table that act as lookup fields, and due to TmemDataset's lack of ability to have lookup fields, I plan to calculate them in the onCalcFields event using the locate method.
Yes, I know I can write a function that calculates these values ​​when needed, but I would prefer the onCalcFields event.

[wp]

Maybe you should try TBufDataset. It is a memory table, too, but is more complete.

[dpap]

I know this but TBufDataset needs a file to write/read and this is not convenient for me

[Thaddy]

I know this but TBufDataset needs a file to write/read and this is not convenient for me

To my knowledge that is not true.
Just call Buffdataset.CreateDataset; // I tested that just now!!
It does not need a filename.
And the use of Tmemtable is discouraged anyway.
The code should be marked as deprecated.

[egsuh]

TMemDataSet does not, but TBufDataSet has OnCalcFields event handler. So, you should use TBufDataSet. You do not need a file for it.