Configuring an Expression for Dynamic Cache Updates
Configuring an Expression for Dynamic Cache Updates
You must enable the Lookup transformation to perform dynamic lookups before you can create a conditional expression.
Use the following steps to configure an expression for dynamic cache lookup:
Create a dynamic Lookup transformation in the Transformation Developer.
Open the Properties tab.
Enable Lookup Caching and Dynamic Lookup Cache properties.
To create an expression, click the Associated Expression list for the lookup port you want to update.
Select Associated Expression.
The Expression Editor appears.
Define an expression by selecting input ports, lookup ports, and functions. The expression return value must match the lookup port type.
Click Validate to verify that the expression is valid.
If you do not validate an expression, the Designer validates it when you close the Expression Editor. If the expression is not valid, the Designer displays a warning.