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7 db_next_id($existing_id = 0)

Retrieves a unique id.

Use this function if for some reason you can't use a serial field. Using a serial field is preferred, and InsertQuery::execute() returns the value of the last ID inserted.


$existing_id: After a database import, it might be that the sequences table is behind, so by passing in a minimum ID, it can be assured that we never issue the same ID.

Return value

An integer number larger than any number returned before for this sequence.

Related topics

4 calls to db_next_id()


drupal/includes/database/, line 2622
Core systems for the database layer.


function db_next_id($existing_id = 0) {
  return Database::getConnection()->nextId($existing_id);