lookup_Pentaho data Integration

问题

I have two files (App.csv and Acess.csv)

1. App.csv has one column called Application
   Application
   App-A

   App-B

2. Access.csv contains 3 columns (Application, entitlement, userid)

       Application, entitlement, userid
   
       App-A,ent-A,user1
       App-A,ent-B,user1
       App-B,ent-c,user2
       App-B,ent-d,user1
       App-C,ent-c,user2
       App-C,ent-d,user1   
   

3. I need extract all the App-A and App-B details if it matches Application file column and output should like be below

       App-A,ent-A,user1                                                                                                                                                                                                                         
       App-A,ent-B,user1
       App-B,ent-c,user2
       App-B,ent-d,user1
   

4. i tried using stream-lookup but it's only giving one row per App instead of all rows belongs to App-A and App-B

any help is appreciated

回答1:

I have prepare a solution for you Here

I used user-define-java-class to compare the value.

1. RunTrans.ktr: I take app.csv input from here and make data in one row.
2. ForOnlyLoop.kjb: This is just for passing data to next transformation.
3. CopmareAndResult.ktr: I take access.csv input from here and compare result, if value match then return row otherwise return nothing.

Please let me know if its ok with you.

Another Solution:- You can get same solution using ETL metadata Injection step from Here

1. MetaData.ktr:- Take App.csv input and pass value to compare ktr.
2. Compare.ktr: Take access.csv input and compare value with 'switch/case' step. I have provided switch- case comparison value from MataData.ktr step.

来源：https://stackoverflow.com/questions/64161359/lookup-pentaho-data-integration