AlterQuery  enums (children 2)
 ExpressionList (children 3)
  AlterCommand MODIFY_COLUMN (children 1)
   ColumnDeclaration e (children 1)
    DataType Enum16 (children 1)
     ExpressionList (children 3)
      Function equals (children 1)
       ExpressionList (children 2)
        Literal \'world\'
        Literal UInt64_2
      Function equals (children 1)
       ExpressionList (children 2)
        Literal \'hello\'
        Literal UInt64_1
      Function equals (children 1)
       ExpressionList (children 2)
        Literal \'!\'
        Literal UInt64_3
  AlterCommand MODIFY_COLUMN (children 1)
   ColumnDeclaration sign (children 1)
    DataType Enum16 (children 1)
     ExpressionList (children 2)
      Function equals (children 1)
       ExpressionList (children 2)
        Literal \'minus\'
        Literal Int64_-1
      Function equals (children 1)
       ExpressionList (children 2)
        Literal \'plus\'
        Literal UInt64_1
  AlterCommand MODIFY_COLUMN (children 1)
   ColumnDeclaration letter (children 1)
    DataType Enum16 (children 1)
     ExpressionList (children 4)
      Function equals (children 1)
       ExpressionList (children 2)
        Literal \'a\'
        Literal UInt64_0
      Function equals (children 1)
       ExpressionList (children 2)
        Literal \'b\'
        Literal UInt64_1
      Function equals (children 1)
       ExpressionList (children 2)
        Literal \'c\'
        Literal UInt64_2
      Function equals (children 1)
       ExpressionList (children 2)
        Literal \'no letter\'
        Literal Int64_-256
 Identifier enums