Appian Queries - Null Total Count

RE: Appian Queries - Null Total Count

Peter Lewis — Thu, 22 Aug 2019 13:40:09 GMT

Yep, if your "primary key" field isn't actually unique, then you can have some strange behavior. Can you create a combined field that would work as a primary key instead? If this is a database view, you could either use the primary key of one of the tables you queried from or create a key by combining data together. For instance, suppose I created a database view to build a line chart that displays a monthly count of records added I could create a column for the primary key as a concatenation of the year and month (e.g. 201901, 201902), which should be unique.

RE: Appian Queries - Null Total Count

Mike Schmitt — Wed, 21 Aug 2019 19:54:15 GMT

[quote userid="33833" url="~/discussions/f/data/17492/appian-queries---null-total-count/68939"]It's interesting that when the paging info is (1,-1), it handles the nulls perfectly fine.[/quote]

yeah - i suppose in that case it's probably just using the total returned data length (since it's fetching everything anyway, it doesn't need to do an additional call to the database to get a total count).

RE: Appian Queries - Null Total Count

justinp821 — Wed, 21 Aug 2019 19:52:49 GMT

It's interesting that when the paging info is (1,-1), it handles the nulls perfectly fine. I ended up using count(ri!datasubset.data) as a solution.

RE: Appian Queries - Null Total Count

Mike Schmitt — Wed, 21 Aug 2019 19:51:59 GMT

I'm not 100% certain what's going on in your case, but your guess is probably close - as far as I've seen from personal experience, Appian expects that the column designated as "primary key" in the CDT (whether or not it's actually a primary key in the DB) will be unique and populated for each row. If that's not the case with your view, I suggest trying to alter the view and/or CDT such that there can be a column which will always have a value and all values in that column will be unique.