Unstable test TestFixControl45132

[zimulala]

Bug Report

CI: https://do.pingcap.net/jenkins/blue/organizations/jenkins/pingcap%2Ftidb%2Fghpr_unit_test/detail/ghpr_unit_test/32027/pipeline/

[2023/09/05 12:13:40.125 +08:00] [INFO] [analyze.go:627] ["analyze table `test`.`t` has finished"] [partition=] ["job info"="analyze table all columns with 256 buckets, 500 topn, 1 samplerate"] ["start time"=2023/09/05 12:13:39.960 +08:00] ["end time"=2023/09/05 12:13:40.123 +08:00] [cost=163.387722ms] ["sample rate reason"="use min(1, 110000/10000) as the sample-rate=1"]
    result.go:49: 
        	Error Trace:	testkit/result.go:49
        	            				planner/core/casetest/integration_test.go:1597
        	Error:      	Not equal: 
        	            	expected: "[TableReader_7 128.00 root  data:Selection_6]\n[└─Selection_6 128.00 cop[tikv]  eq(test.t.a, 2)]\n[  └─TableFullScan_5 12928.00 cop[tikv] table:t keep order:false]\n"

        	            	actual  : "[TableReader_7 119.00 root  data:Selection_6]\n[└─Selection_6 119.00 cop[tikv]  eq(test.t.a, 2)]\n[  └─TableFullScan_5 12065.00 cop[tikv] table:t keep order:false]\n"
        	            	

        	            	Diff:
        	            	--- Expected
        	            	+++ Actual

        	            	@@ -1,4 +1,4 @@
        	            	-[TableReader_7 128.00 root  data:Selection_6]
        	            	-[└─Selection_6 128.00 cop[tikv]  eq(test.t.a, 2)]
        	            	-[  └─TableFullScan_5 12928.00 cop[tikv] table:t keep order:false]
        	            	+[TableReader_7 119.00 root  data:Selection_6]
        	            	+[└─Selection_6 119.00 cop[tikv]  eq(test.t.a, 2)]
        	            	+[  └─TableFullScan_5 12065.00 cop[tikv] table:t keep order:false]
        	            

        	Test:       	TestFixControl45132
        	Messages:   	sql:explain select * from t where a=2, args:[]