EXISTS

Syntax
EXISTS key [key ...]
Available since:
1.0.0
Time complexity:
O(N) where N is the number of keys to check.
ACL categories:
@keyspace, @read, @fast,

Returns if key exists.

The user should be aware that if the same existing key is mentioned in the arguments multiple times, it will be counted multiple times. So if somekey exists, EXISTS somekey somekey will return 2.

Examples




        
        
        
          
          
          
          
            
            
            
RESP2/RESP3 Reply


          

          
          
            
              
              
              
                
              
              
              Integer reply: the number of keys that exist from those specified as arguments.
            
          
        
        


        
          
History

          
    
            
            
  • Starting with Redis version 3.0.3: Accepts multiple key arguments.
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