question related to using join in Expression Rule

RE: question related to using join in Expression Rule

Karumuru Abhishek — Wed, 24 Jul 2024 03:46:20 GMT

hi hritiks4748 there are two ways, One could be creating a view for that code and next creating a data store entity in Appian and querying the DSE. The approach would be to create a stored procedure in the database for this code, and in Appian call the stored procedure using the function named a!executeStoredProcedureForQuery()

RE: question related to using join in Expression Rule

Mike Schmitt — Tue, 23 Jul 2024 16:28:26 GMT

If you're doing traditional (entity-wise) querying in the expression rule, you merely create a DB view that utilizes the joining logic you want, create a Data Store Entity pointing to that view, then query it in your code.

If you're using RecordType data (synced records etc), you should be able to do basically the same thing inherently in your data structure by configuring Related Record Data.

As Stefan mentioned, "joins" in expression code aren't really a thing. The closest you could come is to query from table A and query from table B with filtering on the values you've already retrieved from A, which could work depending on what your requirements are, but doesn't scale well (it gets pretty costly if your volume of queried data starts to become large at all), and doing the necessary coding requires precise and sometimes confusing intricacy.

RE: question related to using join in Expression Rule

Stefan Helzle — Tue, 23 Jul 2024 13:17:55 GMT

Expressions in Appian do not support DB joins. I suggest to have a look at synced records and related record queries.