Add the query pushdown parameter to the Table Input or MongoDB Input steps

The input step allows you to query the data source. These instructions explain how to add a parameter that will act as a WHERE clause in the SQL query or the equivalent type of clause in the MongoDB query.

1. Create a transformation that has a Table Input or MongoDB Input step.
2. Run your transformation to ensure it executes properly.
3. Double-click the input step (Table Input or MongoDB Input) that contains the query you want to optimize.
4. Add a parameter to the location of the WHERE clause value, like this:

   • SQL Query Example: SELECT * FROM media WHERE ${countryParam}
   • MongoDB Query Example: {$match : ${mongoDbParam}}
5. Press CTRL SPACE to view the list of parameters. Click on a parameter from the list to add it to the query.
6. Select the Replace Variables in Script? checkbox.
7. Click the OK button.
8. Set up the Query Pushdown Parameter Optimization.