Adding a column to the database, write and read the data from it

[Malko]

Hi,
As the topic says, I'm having a problem of determining where I can alter a Database table - the best option would be a table for shipment, so I can add an additional column in there and write my additional datas into it at the page of Shipping method choosement (every user has his own data). After that I want to show the written data at the cart checkout.
Can anyone help me to:
- alter the table to add the additional column (where to find the files),
- provide the code to write to that column,
- provide the code to read from that column?

Thank you in advance for any help.

I'm using Joomla! 3.6 and  VirtueMart 3.0.17

[Ghost]

Sounds like you need to create a shipment plugin. Use /plugins/vmshipment/weight_countries/ as example.

[GJC Web Design]

Yes . I agree with Ghost .. you can store extra info in a ship plug or even use a cart shopper field that will store with the order

[Malko]

Yes . I agree with Ghost .. you can store extra info in a ship plug or even use a cart shopper field that will store with the order

could you show me en example how to do that programatically?