title: Query several NEXTVAL from sequence in one statement
body: <p>Basically, I need to query about a thousand NEXTVAL from a sequence. I can query them in a loop, or I can query them through a join with a reeeeeally big table.</p>
  
  <p>Is there any less hacky way?</p>
  
  <p><strong>Upd.</strong>
  Basically, I have a schedule of operations on objects. Each object has either a generated UUID, or an ID from database. After I calculate an optimal schedule, I need to write it into DB, but every ID in the table HAS to be from a sequence. So I need to query some IDs from that sequence. The problem is that looping query is slow, since the DB is really far from me, and I can't just loose several seconds while executing dozens of queries in a loop. So I need to query all those new IDs in one query.</p>