MySQL sending data of dynamically created table

Question

I'm creating a MySQL database to store data of tables which columns can change. This is why I'm using a stored procedure to dynamically create the tables.

My procedures allow creating, for example, a table with three double columns "ColumnA", "ColumnB" and "ColumnC".

Now I need to populate those tables with numbers from an application. This could be thousands of rows. I'm wondering how can I transfer the data without doing a query per each cell.

Up to now, my only idea is to create a stored procedure that, given the row ID and the column name, creates or updates the cell value.

However, it doesn't feel like a good idea considering that tables could have around 10 columns and 1.000 rows, which would require 10.000 calls to the procedure.