autoid

type Allocator interface {
	// Alloc allocs the next autoID for table with tableID.
	// It gets a batch of autoIDs at a time. So it does not need to access storage for each call.
	Alloc(tableID int64) (int64, error)
	// Rebase rebases the autoID base for table with tableID and the new base value.
	// If allocIDs is true, it will allocate some IDs and save to the cache.
	// If allocIDs is false, it will not allocate IDs.
	Rebase(tableID, newBase int64, allocIDs bool) error
	// Base return the current base of Allocator.
	Base() int64
	// End is only used for test.
	End() int64
	// NextGlobalAutoID returns the next global autoID.
	NextGlobalAutoID(tableID int64) (int64, error)
}