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 test_merge
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      Subquery (alias n) (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 1)
          ExpressionList (children 1)
           Literal \'anystring\' (alias name)
     TableJoin (children 1)
      ExpressionList (children 1)
       Identifier name
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier id
     Literal UInt64_1
