SelectWithUnionQuery (children 2)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 2)
    Identifier v
    Function variantElement (children 1)
     ExpressionList (children 2)
      Identifier v
      Literal \'Array(UInt64)\'
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function format (children 1)
       ExpressionList (children 3)
        Identifier CSV
        Literal \'v Variant(String, Array(UInt64))\'
        Literal \'\\\\N\\n"string"\\n"[1, 2, 3]"\\n"[null, null, null]"\\n"[1, 2, \\\'hello\\\']"\\n"[1, 2"\'
 Identifier CSV
