SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function format (children 1)
       ExpressionList (children 3)
        Identifier CSVWithNames
        Literal \'x UInt32, z UInt32\'
        Literal \'"x","y"\\n1,1\\n2\\n\\n3,3,3,3\'
   Set
