Does Oracle have a filtered index concept?

Question

Similar to SQLServer where I can do the following

create index TimeSeriesPeriodSs1 on TimeSeriesPeriod (validationStatus, completionStatus)
where completionS         


        

Answer 1

Here's a small variant on Justin and Alex's answer that might save further index space and makes the modified query more readable IMO:

CREATE INDEX TimeSeriesPeriodSs1
    ON TimeSeriesPeriod( 
          (CASE WHEN completionStatus = 'Complete' AND validationStatus = 'Pending'
                THEN 1
                ELSE NULL
           END);

SELECT * FROM TimeSeriesPeriod
  WHERE 1 = (CASE WHEN completionStatus = 'Complete' AND validationStatus = 'Pending'
                THEN 1
                ELSE NULL
             END)