What are the mapping parameters and variables in Informatica?

Mapping parameters and variables basically represent values in mappings and mapplets.

Mapping Parameters

• They are used to represent a static value which can be defined before starting a session.
• It has the same value throughout the entire session.

Mapping Variables

• Here, the values change between the sessions.
• The latest value of a mapping variable is saved by the Integration Service in the repository at the end of each session.
• It can be used to override a saved value within a parameter file.