SQLite returning groups with same number of rows in Android

I have below SQLite query:

        select  
                product._id
                supermarket._id
                datetime(price.timestamp,'localtime') as LOCAL_TIMESTAMP,
                price.price
        from price inner join product on price.productid = product._id
                   inner join supermarket on price.supermarketid = supermarket._id

        order by price.productid, price.supermarketid, price.timestamp

Rows are ordered by productid, supermarketid and timestamp. Doing so they are grouped but not all pairs products-supermarket have the same timestamps so is it possible to obtain all pairs products-supermarket with the same number of timestamps? If a pair product-supermarket has not a timestamp, then set its price to 0 in the returned result.

For example, above query may return:

Product_A Supermarket_A "2014-03-10 00:00:00"   2.3
Product_A SUpermarket_A "2014-04-10 00:00:00"  15.0
Product_A SUpermarket_A "2014-04-20 00:00:00"  10.5

Product_B Supermarket_A "2014-01-01 00:00:00"  23.3
Product_B SUpermarket_A "2014-05-21 00:00:00"   1.0

and I would like to obtain:

Product_A Supermarket_A "2014-01-01 00:00:00"   0.0
Product_A Supermarket_A "2014-03-10 00:00:00"   2.3
Product_A SUpermarket_A "2014-04-10 00:00:00"  15.0
Product_A SUpermarket_A "2014-04-20 00:00:00"  10.5
Product_A SUpermarket_A "2014-05-21 00:00:00"   0.0

Product_B Supermarket_A "2014-01-01 00:00:00"  23.3
Product_B Supermarket_A "2014-03-10 00:00:00"   0.0
Product_B Supermarket_A "2014-04-10 00:00:00"   0.0
Product_B Supermarket_A "2014-04-20 00:00:00"   0.0
Product_B SUpermarket_A "2014-05-21 00:00:00"   1.0

In each product-supermarket pair appears all the timestamps (like an union). If a product-supermarket pair has not the timestamp, it is created and its price set to 0.0.

Is it possible to do in SQL?