SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (alias t1) (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 1)
          ExpressionList (children 2)
           Literal UInt64_0 (alias k)
           Function toInt16 (alias v) (children 1)
            ExpressionList (children 1)
             Literal UInt64_1
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      Subquery (alias t2) (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 1)
          ExpressionList (children 2)
           Literal UInt64_0 (alias k)
           Function toInt16 (alias v) (children 1)
            ExpressionList (children 1)
             Literal UInt64_0
     TableJoin (children 1)
      ExpressionList (children 2)
       Identifier k
       Identifier v
