InsertQuery   (children 2)
 Identifier t_json_parallel
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 2)
    ExpressionList (children 1)
     Function materialize (children 1)
      ExpressionList (children 1)
       Literal \'{"k1":1, "k2": "some"}\'
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       Function numbers_mt (children 1)
        ExpressionList (children 1)
         Literal UInt64_500000
