如何从另一列中计算出一列？

Question

In monetdb I created a table:

create table extractedcatalog(id int, ra double, decl double, x double, y double, z double);

ra,decl are all inserted into tables already, now I want to calculate x,y,z from ra,decl columns. In sql I executed like this:

update extractedcatalog set x = (cos(radians(decl))*cos(radians(ra)));

but i got response:

connection terminated

Is there any problem with my sql query?

Thanks very much!

Answer 1

Please indicate your platform and MonetDB version. A Connection Termination message indicates a loss of contact between your client and server. You may look into the Merovingian log file for further clues on the underlying cause.