You can override the source table name in the session properties. Override the source table name when you use a single session to read data from different source tables. Enter a table name in the source table name, or enter a parameter or variable to define the source table name in the parameter file. You can use mapping parameters, mapping variables, session parameters, workflow variables, or worklet variables in the source table name. For example, you can use a session parameter, $ParamSrcTable, as the source table name, and set $ParamSrcTable to the source table name in the parameter file.