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  - Differences between SETVARIABLE, SETMAXVARIABLE, and SETMINVARIABLE
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Function Reference

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Differences between SETVARIABLE, SETMAXVARIABLE, and SETMINVARIABLE

When you use SETVARIABLE,

Data Integration

sets the in-out parameter to the last processed value. When you use SETMAXVARIABLE or SETMINVARIABLE, the in-out parameter is set as the highest or lowest value in your data set.

In the following example data set, DEPT_NO is an int type and DEPT_NAME is a string type.

DEPT_NO	DEPT_NAME
1	Human Resources
2	Research & Development
7	Finance
8	IT
5	Marketing

You run a mapping task that includes one of the functions in an Expression transformation. The following table lists the parameter values that result for each function.

Function	In-out parameter value
SETVARIABLE($$p_io_int, DEPT_NO)	5
SETMAXVARIABLE($$p_io_int, DEPT_NO)	8
SETMINVARIABLE($$p_io_int, DEPT_NO)	1

Now consider re-running the same mapping task with the following updated data set:

DEPT_NO	DEPT_NAME
1	Human Resources
2	Research & Development
7	Finance
8	IT
5	Marketing
9	Customer Support
4	Sales

Using these new values, the in-out parameter sets to the following values when you use these functions:

Function	In-out parameter value
SETVARIABLE($$p_io_int, DEPT_NO)	5 Even though the last value processed is 4, the output value remains as 5 because the Max aggregation type selects the higher value.
SETMAXVARIABLE($$p_io_int, DEPT_NO)	9 Since 9 is higher than the previously selected value of 8, the Max aggregation type updates the output value to 9.
SETMINVARIABLE($$p_io_int, DEPT_NO)	1