func (c *cMem) flush(mem *memdb.DB, level int) error {
s := c.s
// Write memdb to table.
iter := mem.NewIterator(nil)
defer iter.Release()
t, n, err := s.tops.createFrom(iter)
if err != nil {
return err
}
// Pick level.
if level < 0 {
v := s.version()
level = v.pickLevel(t.imin.ukey(), t.imax.ukey())
v.release()
}
c.rec.addTableFile(level, t)
s.logf("mem@flush created L%d@%d N·%d S·%s %q:%q", level, t.file.Num(), n, shortenb(int(t.size)), t.imin, t.imax)
c.level = level
return nil
}
func isMemOverlaps(icmp *iComparer, mem *memdb.DB, min, max []byte) bool {
iter := mem.NewIterator(nil)
defer iter.Release()
return (max == nil || (iter.First() && icmp.uCompare(max, iKey(iter.Key()).ukey()) >= 0)) &&
(min == nil || (iter.Last() && icmp.uCompare(min, iKey(iter.Key()).ukey()) <= 0))
}
func (b *Batch) revertMemReplay(to *memdb.DB) error {
return b.decodeRec(func(i int, kt kType, key, value []byte) {
ikey := newIkey(key, b.seq+uint64(i), kt)
to.Delete(ikey)
})
}