A mapping parameter is a user definable constant that takes
up a value before running a session. It can be used in SQ expressions,
Expression transformation etc.
- Define the parameter in the mapping designer - parameter & variable.
- Use the parameter in the Expressions.
- Define the values for the parameter in the parameter file.
A mapping variable is also defined similar to the parameter
except that the value of the variable is subjected to change.It picks up the
value in the following order.
- From the Session parameter file.
- As stored in the repository object in the previous run.
- As defined in the initial values in the designer.
- Default values
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