The tableOf() and the columnOf() functions
The tableOf() and the columnOf() functions are
auxiliary syntax instruments for special occasions.
They allow you to calculate the table name or the field name
on the spot, without knowing it beforehand.
Pass these functions a value of type String. You may want to use them when you have the same query for several tables, for instance.
Example
In the following example you can see a helper function. When you call this function and pass the table name, the field name and the value to it, in updates all documents in a specified table, setting the field with the new value. Note that the value can be of any type.
fun setValueToDB(tableName, fieldName, value) {
update tableOf(tableName) set columnOf(fieldName) = value
}