CREATE-INDEX — Create a database index.Function
nameThe name of the index as a string, symbol or SQL expression.
onThe name of a table as a string, symbol or SQL expression.
uniqueA Boolean.
attributesA list of attribute names.
databaseA database object which defaults to *default-database*.
Creates an index called name on the
      table specified by on in
      database which default to
      *default-database*. The table attributes to use
      in constructing the index name are
      specified by attributes. The
      unique argument is NIL by default but
      if it has a non-NIL value then the indexed attributes must
      have unique values.
      
(create-index [bar] :on [employee] 
              :attributes '([first-name] [last-name] [email]) 
              :unique t)
=> 
(index-exists-p [bar])
=> T