SAP CPI: JDBC Lookup

Hi,

I want to do a JDBC lookup in CPI which then will determine the next process to be done with the main payload.

Here is my iFlow:

Basically

1. Step 1 will do a SFTP connection and get a file to be processed

2. Step 2, here I create a Content Modifier to prepare the SQL SELECT statement in the Message Body

3. Step 3, I use the JDBC adapter to execute the SELECT statement from step 2 and receive the lookup table

The problem here is, since the SQL statement in step 2 is stored in the Message Body, then the file content read from step 1 is overwritten from step 2.

My goal is to use the result of the JDBC call in step 3 to check against the file payload from step 1 then determine what the next step is. In another word, something similar to JDBC lookup.

So, the question is how to do JDBC lookup in CPI?

Thank you