Restrict a temporal number to (the complement of) an array of spans of base values. 
- Parameters
- 
  
    | [in] | ss | Temporal number |  | [in] | spanset | Span set |  | [in] | atfunc | True if the restriction is at, false for minus |  
 
- Returns
- Resulting temporal number value 
- SQL Function:
- atSpanset(), minusSpanset()