PreparedStatement IN clause alternatives?

Question

What are the best workarounds for using a SQL IN clause with instances of java.sql.PreparedStatement, which is not supported for multiple values du

Answer 1

Here's how I solved it in my own application. Ideally, you should use a StringBuilder instead of using + for Strings.

    String inParenthesis = "(?";
    for(int i = 1;i < myList.size();i++) {
      inParenthesis += ", ?";
    }
    inParenthesis += ")";

    try(PreparedStatement statement = SQLite.connection.prepareStatement(
        String.format("UPDATE table SET value='WINNER' WHERE startTime=? AND name=? AND traderIdx=? AND someValue IN %s", inParenthesis))) {
      int x = 1;
      statement.setLong(x++, race.startTime);
      statement.setString(x++, race.name);
      statement.setInt(x++, traderIdx);

      for(String str : race.betFair.winners) {
        statement.setString(x++, str);
      }

      int effected = statement.executeUpdate();
    }

Using a variable like x above instead of concrete numbers helps a lot if you decide to change the query at a later time.