4. Defining Data Types : hmax Routine--Create Histogram Value for Maximum Value
 
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hmax Routine--Create Histogram Value for Maximum Value
This routine is used by the optimizer to obtain the histogram value for the largest value of a type. Place the address of this routine in the dtd_hmax_addr field of the IIADD_DT_DFN structure. If the II_DT_NOHISTOGRAM attribute is present, then this routine is not necessary.