----------------------------------------------------------------------- WORKLOG TASK -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- TASK...........: Make the optimizer use extended keys CREATION DATE..: Sat, 31 Dec 2011, 05:49 SUPERVISOR.....: IMPLEMENTOR....: Igor COPIES TO......: Igor Monty Psergey Sanja Sergei Timour CATEGORY.......: Server-BackLog TASK ID........: 247 (http://askmonty.org/worklog/?tid=247) VERSION........: Server-5.5 STATUS.........: Assigned PRIORITY.......: 60 WORKED HOURS...: 0 ESTIMATE.......: 60 (hours remain) ORIG. ESTIMATE.: 60 PROGRESS NOTES: DESCRIPTION: Currently the optimizer mostly does not use hidden components of InnoDB keys. Meanwhile these components contain fields of the primary key and could be used to to generate more efficient execution plans. In particular using these components in many cases allow to generate execution plans that that employs index only look-ups. This task will support usage of extended keys for: - ref and eq-ref accesses - range scans - index-merge scans - loose scans - min/max optimization ESTIMATED WORK TIME ESTIMATED COMPLETION DATE ----------------------------------------------------------------------- WorkLog (v4.0.0)