Update release notes for release-6.6.0 (#13724) (#13817)

pingcap · Jun 9, 2023 · 1471fee · 1471fee
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commit 1471fee
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diff --git a/releases/release-6.6.0.md b/releases/release-6.6.0.md
@@ -561,6 +561,7 @@ In v6.6.0-DMR, the key new features and improvements are as follows:
     - Fix the issue that querying TiFlash-related system tables might get stuck [#6745](https://github.com/pingcap/tiflash/pull/6745) @[lidezhu](https://github.com/lidezhu)
     - Fix the issue that semi-joins use excessive memory when calculating Cartesian products [#6730](https://github.com/pingcap/tiflash/issues/6730) @[gengliqi](https://github.com/gengliqi)
     - Fix the issue that the result of the division operation on the DECIMAL data type is not rounded [#6393](https://github.com/pingcap/tiflash/issues/6393) @[LittleFall](https://github.com/LittleFall)
+    - Fix the issue that `start_ts` cannot uniquely identify an MPP query in TiFlash queries, which might cause an MPP query to be incorrectly canceled [#43426](https://github.com/pingcap/tidb/issues/43426) @[hehechen](https://github.com/hehechen)
 
 + Tools