What are mapping parametres and variables in informatica?

Answer Posted / bsgsr

mapping parameters and variables make the mappings reusable
and saves time. ex: u have created a mapping to load the
data of only deptno 10 into the target. next time if you
want to load the data of deptno 20 u have to create the
mapping again which is fom the scratch again. if you create
a parameter and define the value in the parameter file you
can simply change the value of the parameter and can use
the mapping again.

mapping parameter represents a constant value that doesnt
change during the session run where as mapping variable
represents a value which changes during the session run
and saves the max value to the repository which is used
next time when you run the session.

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