index_object:tuple_pos()
-
object
index_object
¶ -
index_object:
tuple_pos
(tuple)¶ Return a tuple’s position for an index. This value can be passed to the
after
option of theselect
andpairs
methods:Note that
tuple_pos
does not work with functional and multikey indexes.Параметры: - index_object (
index_object
) – an object reference - tuple (
scalar/table
) – a tuple whose position should be found
Return: a tuple’s position in a space
Rtype: base64-encoded string
Example:
To try out this example, you need to bootstrap a Tarantool instance as described in Using data operations.
-- Insert test data -- tarantool> bands:insert{1, 'Roxette', 1986} bands:insert{2, 'Scorpions', 1965} bands:insert{3, 'Ace of Base', 1987} bands:insert{4, 'The Beatles', 1960} bands:insert{5, 'Pink Floyd', 1965} bands:insert{6, 'The Rolling Stones', 1962} --- ... -- Get a tuple's position -- tarantool> position = bands.index.primary:tuple_pos({3, 'Ace of Base', 1987}) --- ... -- Pass the tuple's position as the 'after' parameter -- tarantool> bands:select({}, {limit = 3, after = position}) --- - - [4, 'The Beatles', 1960] - [5, 'Pink Floyd', 1965] - [6, 'The Rolling Stones', 1962] ...
- index_object (
-