kdb q params Error

Params error is caused when you try to create a function with more than 8 parameters. To us this sounds like a reasonable tradeoff to make functions readable. If you find your hitting this limit, try to group the arguments into cohesive objects (lists/dictionaries).

		
q)f:{[a;b;c;d;e;f;g;h] g*100}
q)f:{[a;b;c;d;e;f;g;h;i] g*100}
'params

q) / rewrite to group common variables into a dictionary
q)f:{[pVol; pSize; pLimit; pHeight; portSize; portValue; portTime;h;i] g*100}
'params
q)p:`vol`size`limit`height!(1 ; 2; 200; 3)
q)port:`height`size`value!(`large;`expensive; 08:00t)
q)f:{ [p; port; h; i] h*100}

We have written a kdb style guide that contains advice around naming, passing arguments and spacing that you may also find useful.

See Also