Thursday, April 21, 2011

Find All The Columns in Indexes with SQL Azure

In SQL Server on-premise, this query is often used to find all the columns that are currently participating in an index:

SELECT OBJECT_NAME(sysindexkeys.id) Table_Name,
            
syscolumns.name Column_Name,
            
sysindexes.name Index_Name,
    
CASE WHEN
                
INDEXKEY_PROPERTY(sysindexes.id, sysindexes.indid, sysindexkeys.keyno, 'IsDescending')=0
                
THEN 'Ascending'
    
ELSE    'Descending'
    
END SORT_ORDER
    
FROM sysindexkeys
            
INNER JOIN syscolumns
            
ON sysindexkeys.colid=syscolumns.colid
        
AND sysindexkeys.id=syscolumns.id
            
INNER JOIN sysindexes
            
ON sysindexkeys.indid=sysindexes.indid
        
AND sysindexkeys.id=sysindexes.id
            



In SQL Azure, we don't have sysindexes or sysindexkeys. Instead, we use sys.indexes and sys.index_columms. It looks like this:

SELECT OBJECT_NAME(sysindexkeys.OBJECT_ID) Table_Name,
            
syscolumns.name Column_Name,
            
sysindexes.name Index_Name,
    
CASE WHEN is_descending_key = '0' THEN 'Ascending'
    
ELSE 'Descending'
    
END AS SORT_ORDER,
            
type_desc AS indexType
    
FROM sys.index_columns sysindexkeys
            
INNER JOIN syscolumns
            
ON sysindexkeys.index_column_id=syscolumns.colid
        
AND sysindexkeys.OBJECT_ID=syscolumns.id
            
INNER JOIN sys.indexes sysindexes
            
ON sysindexkeys.index_id=sysindexes.index_id
        
AND sysindexkeys.OBJECT_ID=sysindexes.OBJECT_ID
            

Sunday, April 17, 2011

Father of the Year Candidate at Desert Code Camp 2011


As I was walking around the campus at Desert Code Camp last month, a man stopped me. This guy had tattoos riding up his arm, a flat-brim hat, baggy jeans, and looked like he just walked off the construction site...not your typical code camp attendee. Trailing him was a skinny 12-year-old boy wearing a pacman t-shirt.

"Excuse me, I have no idea what my son is saying. Can you please translate?"

His son wanted to go to a specific class. I found one close enough on the schedule and pointed them on their way. Later, as I was running around after my own sons, I saw the man walk out of the class his son was in. He found a chair by the door, sat down, and waited. As I walked around code camp that day, I saw the same sight over and over again. This guy was either walking his son to the next class, or waiting outside the door.

I wonder what he was thinking about with all that free time that day. Perhaps, "why doesn't my boy like to throw the football?" Or, "why can't we make furniture together?" I wonder how many super smart kids are born to parents that are not as generous and thoughtful as that man. I wonder how many brilliant minds the world has lost out on because of bad luck or circumstance.

On the flip side, maybe one of my sons was meant to be an NFL Quarterback, but we'll never know. They're stuck in code camp classes.