InsertQuery   (children 2)
 Identifier table1
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 2)
    ExpressionList (children 1)
     Identifier x
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       Function format (children 1)
        ExpressionList (children 3)
         Identifier JSONEachRow
         Literal \'x AggregateFunction(uniq, UInt64)\' (alias T)
         Literal \'{"x":""}\'
