In SAP HANA, you can define package specific default schema as an authoring schema in your schema mapping definition and maintain it in the table M_PACKAGE_DEFAULT_SCHEMA.
To perform this, navigate to SAP HANA Modeler perspective -> Maintain Package Specific Default Schema
Select HANA system and it will show you schema names mapping as per package. You can maintain a default schema for each package. You can also add packages by clicking on Add button.