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planner: split avg to count and sum for TableReader cop task #11926
What problem does this PR solve?
Because the calculation of
A sub PR for support the coprocessor in tiflash.
What is changed and how it works?
@@ Coverage Diff @@ ## master #11926 +/- ## =========================================== Coverage 81.4033% 81.4033% =========================================== Files 444 444 Lines 95560 95560 =========================================== Hits 77789 77789 Misses 12291 12291 Partials 5480 5480
1 similar comment
Yeah, does it mean that the execution instruction in TiKV is not changed? I'm afraid that this pr would impact the end-to-end performance of a SQL.
Only a little. Because TiKV executes