SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 2)
    Function space (children 1)
     ExpressionList (children 1)
      Identifier u64
    Function length (children 1)
     ExpressionList (children 1)
      Function space (children 1)
       ExpressionList (children 1)
        Identifier u64
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier defaults
