AlterQuery  defaults_on_defaults (children 2)
 ExpressionList (children 1)
  AlterCommand ADD_COLUMN (children 1)
   ColumnDeclaration Arr.C2 (children 2)
    DataType Array (children 1)
     ExpressionList (children 1)
      DataType UInt32
    Function arrayResize (children 1)
     ExpressionList (children 2)
      Function emptyArrayUInt32 (children 1)
       ExpressionList
      Function length (children 1)
       ExpressionList (children 1)
        Identifier Arr.C1
 Identifier defaults_on_defaults
