sql: update explain
results (#2580)
#3339
Merged
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cherry-pick #2580 to release-4.0
What is changed, added or deleted? (Required)
(Note that this PR does not translate
如果读者想要详细了解各算子的内部实现,可以参见[源码阅读系列](https://pingcap.com/blog-cn/#TiDB-源码阅读)。
and* [TiDB in Action](https://book.tidb.io/session3/chapter1/sql-execution-plan.html)
since the English version does not exist till now. )Which TiDB version(s) do your changes apply to? (Required)
If you select two or more versions from above, to trigger the bot to cherry-pick this PR to your desired release version branch(es), you must add corresponding labels such as needs-cherry-pick-4.0, needs-cherry-pick-3.1, needs-cherry-pick-3.0, and needs-cherry-pick-2.1.
What is the related PR or file link(s)?
explain
results docs-cn#2548