I try to migrate a custom table from Magento 1.9 to Magento 2.2. I managed this for some different tables with map.xml and "move". My problem with this table is, that the new version of the module split the data to different tables.
For example: Old Database:
Table 1: id, name, description
New Database:
Table 1: id, name
Table 2: name, description
How can I manage this with map.xml?
Thank you very much.