index_object:update()

index_object

Update a tuple.

Same as box.space...update(), but key is searched in this index instead of primary key. This index should be unique.

Parameters:

• index_object (index_object) — an object reference.

• key (scalar/table) — values to be matched against the index key

• operator (string) — operation type represented in string

• field_identifier (field-or-string) — what field the operation will apply to. The field number can be negative, meaning the position from the end of tuple. (#tuple + negative field number + 1)

• value (lua_value) — what value will be applied

Returns

• the updated tuple
  • nil if the key is not found

Return type

tuple or nil

Since Tarantool 2.3 a tuple can also be updated via JSON paths.