Need to update a table with millions of rows present.

RE: Need to update a table with millions of rows present.

PK1 — Wed, 26 Apr 2023 13:33:07 GMT

That's the main reason we are creating this utility for, replacing data which was encrypted by old plugin and re encrypt it with the newer function available.

RE: Need to update a table with millions of rows present.

Stefan Helzle — Mon, 24 Apr 2023 08:41:49 GMT

I suggest to redesign this and get rid of the need for the update and that encryption thing.

RE: Need to update a table with millions of rows present.

Harshit Bumb (Appyzie) — Mon, 24 Apr 2023 07:06:22 GMT

In that case, as Stefan said, you can do it during nonworking hours, when there are close to no people working and the least active processes.

RE: Need to update a table with millions of rows present.

PK1 — Mon, 24 Apr 2023 07:02:15 GMT

Hello Harshit,
Thanks for quick reply, I will try to elaborate:

1. Planning to create it as a utility, so it can be reused in future.
2. Yes data will increase overtime.
3. Probably 4-5 columns will be queried as one row.
4. we need to apply new appian encrytion on these queried data, and need to store it back again, I am not sure whether encrypting the data can be done through Stored Procedure.

RE: Need to update a table with millions of rows present.

Stefan Helzle — Mon, 24 Apr 2023 06:48:55 GMT

You write "Since this processing needs to be done at Appian end". Seems like there are no options. Just make sure to do this during low-activity times and add a bit of a delay to the loop.

RE: Need to update a table with millions of rows present.

Harshit Bumb (Appyzie) — Mon, 24 Apr 2023 06:36:40 GMT

There are a couple of factors to determine it.

Is this a one-time operation?
If this is not a one-time operation and repetitive instead, then will the data increase over time?
What is the size of each row?
Any specific reason for doing it via Appian and not an SP on the database instead?

Doing it via SP will anyway be faster and more promising considering you have a huge data and you need to perform the update operation.