WL#2441: Batched operation of rr_from_pointers and rr_from_tempfile
Affects: WorkLog-3.4 — Status: Un-Assigned — Priority: Medium
rr_from_pointers and rr_from_tempfile are used to fetch records from the handlers in SELECT queries and UPDATE, DELETE queries after filesort have been applied. Most handlers will be more efficient if the record read is batched. To be able to handle this rr_from_pointers and rr_from_tempfile can be designed similar to rr_from_cache where the loop of calling rnd_pos is replaced with one handler call rnd_batch_pos(array of record references, array of references, array of errors returned) in handler.cc this can be easily implemented as a simple loop doing rnd_pos for those handlers not wanting to implement rnd_batch_pos.
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