SelectWithUnionQuery (children 2)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 2)
    Identifier v
    Function variantElement (children 1)
     ExpressionList (children 2)
      Identifier v
      Literal \'Map(String, UInt64)\'
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function format (children 1)
       ExpressionList (children 3)
        Identifier Values
        Literal \'v Variant(String, Map(String, UInt64))\'
        Literal \'(NULL), (\\\'string\\\'), ({\\\'a\\\' : 42, \\\'b\\\' : 43, \\\'c\\\' : null})\'
 Identifier Values
