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  1. Preface
  2. The Transformation Language
  3. Constants
  4. Operators
  5. Dates
  6. Functions
  7. Creating Custom Functions
  8. Custom Function API Reference
  9. POWERCENTERHELP

Transformation Language Reference

Transformation Language Reference

Operator Precedence

Operator Precedence

The transformation language supports the use of multiple operators and the use of operators within nested expressions.
If you write an expression that includes multiple operators, the
PowerCenter Integration Service
evaluates the expression in the following order:
  1. Arithmetic operators
  2. String operators
  3. Comparison operators
  4. Logical operators
The
PowerCenter Integration Service
evaluates operators in the order they appear in the following table. It evaluates operators in an expression with equal precedence to all operators from left to right.
The following table lists the precedence for all transformation language operators:
Operator
Meaning
(  )
Parentheses.
+, -, NOT
Unary plus and minus and the logical NOT operator.
*, /,%
Multiplication, division, modulus.
+, -
Addition, subtraction.
||
Concatenate.
<, <=, >, >=
Less than, less than or equal to, greater than, greater than or equal to.
=, <>, !=, ^=
Equal to, not equal to, not equal to, not equal to.
AND
Logical AND operator, used when specifying conditions.
OR
Logical OR operator, used when specifying conditions.
The transformation language also supports the use of operators within nested expressions. When expressions contain parentheses, the
PowerCenter Integration Service
evaluates operations inside parentheses before operations outside parentheses. Operations in the innermost parentheses are evaluated first.
For example, depending on how you nest the operations, the equation 8 + 5 - 2 * 8 returns different values:
Equation
Return Value
8 + 5 - 2 * 8
-3
8 + (5 - 2) * 8
32