Update specific number of jobs and return their ids

gistfile1.sql

-- In psql

UPDATE jobs
SET isRunning = true
  WHERE 
    id IN (
      SELECT id
      FROM jobs
      WHERE 
        providerid = "foo" AND 
        callback = "crawlBar" AND 
        isrunning = FALSE AND 
        nextrun <= 1432252565689
      LIMIT 50
    )
  RETURNING id;