When inserting, we insert one pdf for correlated attributes. For example, in
the table trucks, xpos and ypos are correlated. So, when inserting, we insert
a 2D pdf for xpos, and null for ypos.
INSERT INTO trucks VALUES ('1', 'prod(norm(0,1), norm(0,1))', NULL,
'hist( {5.1 , 5.3} : 0.2 , 0.3 )');
Rohit Jain
2011-08-02