# Working with Relational Sources in a Mapping - Informatica

When you add a relational source to a mapping, you can view the table owner name and override the source table name. You can view this information on the Properties tab of a relational source instance in the Mapping Designer.

The table owner name displays the owner name of the source table in the database. For some databases, such as DB2, tables can have different owners. You can override the table owner name for each source instance in the session properties.

You can override the source table name for relational source instances on the Properties tab of the source instance. Override the source table name when you use a single mapping to read data from different source tables. Enter a table name in the source table name. You can also enter a parameter or variable. 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.

Note:If you override the source table name on the Properties tab of the source instance, and you override the source table name using an SQL query, the Integration Service uses the source table name defined in the SQL query.

To override a source table name:

1. In the Designer, open the Mapping Designer tool.
2. Double-click the title bar of a relational source instance in the mapping.
3. On the Properties tab, enter the source table name. You can also enter a parameter or variable in the Source Table Name field.
4. If you use a user-defined mapping parameter, mapping variable, workflow variable, or worklet variable, you must declare the parameter or variable.

5. Click OK.
6. If you use a parameter or variable for the source table name, define the parameter or variable in the appropriate section of the parameter file.