Data migration tool - Custom table to additional_information
I have 2 modules. One for M1 and one for M2. M1 version of the module uses some custom tables to store transaction data. On M2 this information is added as additional_information on the sales_payment_transaction table.
What would be the best way to map such custom data to be stored as additional_information when migrating? Can you point me in the direction of any documentation that could help me achieve this?