How many database columns associated with a SMS in android?

I want to read all the messages and their respective details from my phone. For this I am using the Uri like this:

Uri sms = Uri.parse("content://sms/");

But I don't know how many columns in database which are associated with this uri.

I want to display the following information:

1. Message Type
2. Sender Number
3. Message Body
4. Timestamp

Please can anybody enumerate the total column names?