Apama 10.3 | Apama Documentation | Developing Apama Applications | EPL Reference | Expressions
Introduction to expressions
Using an expression as a statement
Primary expressions
Bitwise logical operators
Logical operators
Shift operators
Comparison operators
Additive operators
Multiplicative operators
Unary additive operators
Expression operators
Expression operator precedence
Postfix expressions
Stream queries
Stream source templates
In many programs, much work is performed by evaluating expressions, which are combinations of operators, operands, and punctuation. They are used to detect events of interest to the program, perform calculations, comparisons, invoke actions, invoke inbuilt methods, compute parameter values passed to action and method calls, and so on.

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