Thursday, 28 June 2012

PARAMETERS & VARIABLES

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
 Also read Global and local Repository

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