Cost of a routine
The relative cost of a routine is used by the query optimizer to
determine in which order to process WHERE clauses in a SELECT statement.
More expensive routines are called after less expensive routines.
A cost of 0 indicates that the routine costs about the same as the
routines in the reference list that have a cost of 0. The standard
formula for computing routine cost is as follows:
lines_of_code + (I/O_operations x 100)You must follow the general formula to ensure that your routines interact with other DataBlade module routines in a predictable way.
In this tutorial, all routines are inexpensive and have a cost of 0.