yibin comments

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                                            yibin

use `var_samp` as window function cause unexpected error

/label affects-8.1

use `var_samp` as window function cause unexpected error

This should be a planner issue, because it failed in planner phase.

use `var_samp` as window function cause unexpected error

/remove-sig execution

use `var_samp` as window function cause unexpected error

/sig planner

query using distinct and upper() function gets incorrect result

Duplicated with https://github.com/pingcap/tidb/issues/51109, close it

query using distinct and upper() function gets incorrect result

/close

TiDB OOM because of querying information_schema.tables and information_schema.statistics

/close

In the GROUP BY clause, TiDB incorrectly handled ' ' and NULL

The comparison with text type column seems ignoring white spaces. Not common cases. Lower priority to major. ``` mysql> select * from t1 where t1.c0 = ' '; +----+ |...

In the GROUP BY clause, TiDB incorrectly handled ' ' and NULL

/remove-severity critical

In the GROUP BY clause, TiDB incorrectly handled ' ' and NULL

/severity major