AlterQuery  defaults (children 2)
 ExpressionList (children 1)
  AlterCommand ADD_COLUMN (children 2)
   ColumnDeclaration n.c (children 2)
    DataType Array (children 1)
     ExpressionList (children 1)
      DataType UInt8
    Function arrayMap (children 1)
     ExpressionList (children 2)
      Function lambda (children 1)
       ExpressionList (children 2)
        Function tuple (children 1)
         ExpressionList (children 1)
          Identifier x
        Literal UInt64_0
      Identifier n.a
   Identifier n.a
 Identifier defaults
