Quadcap Embeddable Database

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columnConstraint
  :  (  "constraint" sqlId 
    |  
    ) 
    (  "not" "null" 
    |  "unique" 
    |  "primary" "key" 
    |  "references" sqlId 
      (  LPAREN sqlId RPAREN 
      |  
      ) 
      referentialSpec 
    |  "check" expression 
    |  "with" "identity" 
    ) 
    (  
    |  deferrableSpec 
    ) 
  ;