Chapter 12. Database Indexing
In this chapter, we will cover the following recipes:
- Measuring query and index block statistics 
- Index lookups 
- Comparing indexed scans and sequential scans 
- Clustering against an index 
- Concurrent indexes 
- Combined indexes 
- Partial indexes 
- Finding unused indexes 
- Forcing a query to use an index 
- Detecting missing indexes 
- Concurrent indexes 
 
                                             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
     
         
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
        