SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function count (children 1)
     ExpressionList
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier pr_2
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      Function numbers (alias pr_1) (children 1)
       ExpressionList (children 1)
        Literal UInt64_10
     TableJoin (children 1)
      Function equals (children 1)
       ExpressionList (children 2)
        Identifier pr_2.a
        Identifier pr_1.number
   Set
