SQL "IN" Clause

Is there any support for the SQL IN clause? Database.test() .select("select score from person where name IN (?)") .parameters("FRED", "JOSEPH") // or a list of Strings .getAs(Integer.class) .blockingForEach(System.out::println);

I tried a bunch of different ways and I couldn’t figure how I could possibly make it work.

Thank you in advance for your time!

[davidmoten]

You seem to have missed my point. I’ll explain the workaround. I’m not talking about the originally suggested hack which would not work because of protection from sql injection but rather of modifying the sql (not the parameters). Here’s an example.

List<String> list = Lists.newArrayList("FRED","JOSEPH");
String questionMarks =  list
  .stream() 
  .map(x -> "?")
  .collect(Collectors.joining(","));
String sql = "select score from person where name in (" + questionMarks + ");
db.test()
  .select(sql)
  .parameters(list)
  .getAs(Integer.class)
  .blockingForEach(System.out::println);

The full implementation in the api for this will take me a little while (not a quick fix) but would be good to have and with luck I’ll get to it soon but in the meantime you have the above style of workaround.

By the way, many databases have quite low limits for the number of parameters in a sql statement. Oracle used to be about 1000. I think I’ve used 20,000 with H2.

[davidmoten]

Beaut, let me know if more docs needed too