Apama 10.15.0 | Developing Apama Applications | Developing Apama Applications in EPL | Working with Streams and Stream Queries | Using dynamic expressions in stream queries | Understanding when the correlator evaluates particular expressions | Using dynamic expressions in where predicates
 
Using dynamic expressions in where predicates
The correlator evaluates the predicate in a where clause once for each item. This happens as soon as a join operation produces an item, or if there is no join operation, as soon as an item enters a window.