return type for aggregate functions AVG

Hi,

What is the data type of return value for the aggregate function AVG? It’s decimal, double, float, or refers to some columns?

For example:

createcolumntable t1 (c1 decimal(15,2));

insertinto t1 values (1.55555);

selectavg(c1) fromt1; --> return 1.55555 or 1.55

Thanks

BR

Mingyin