SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier test
   Function less (children 1)
    ExpressionList (children 2)
     Function CAST (children 1)
      ExpressionList (children 2)
       Identifier json.a
       Literal \'Int64\'
     Literal UInt64_4
   Set
