WL#821: remove thr_upgraded_concurrent_insert_lock variable
Affects: Server-5.0 — Status: Assigned — Priority: Medium
global variable thr_upgraded_concurrent_insert_lock is definded in mysys/thr_lock.c and is used to set priority for normal INSERT's. REPLACE/DELETE/TRUNCATE/LOAD/LOCK/UPDATE use priority from global_system_variables.low_priority_updates - which is correct. Using global variable (thr_upgraded_concurrent_insert_lock) is wrong because it's dirty hack, incorrect use of my_getopt, and when one does SET SQL_LOW_PRIORITY_UPDATES, INSERTs won't be affected, only REPLACE/DELETE/TRUNCATE/LOAD/LOCK/UPDATE will behave. To do: get rid of thr_upgraded_concurrent_insert_lock, and make INSERTs to use global_system_variables.low_priority_updates.
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