panic in the auto analyze with partition table

[hawkingrei]

Bug Report

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1. Minimal reproduce step (Required)

2. What did you expect to see? (Required)

no panic

3. What did you see instead (Required)

[2024/02/20 14:56:48.560 +08:00] [ERROR] [autoanalyze.go:308] ["HandleAutoAnalyze panicked"] [category=stats] [recover="runtime error: invalid memory address or nil pointer dereference"] [stack="[github.com/pingcap/tidb/pkg/statistics/handle/autoanalyze.HandleAutoAnalyze.func1\n\t/Users/bba/pc/tidb/pkg/statistics/handle/autoanalyze/autoanalyze.go:311\nruntime.gopanic\n\t/Users/bba/.gvm/gos/go1.21.0/src/runtime/panic.go:914\nruntime.panicmem\n\t/Users/bba/.gvm/gos/go1.21.0/src/runtime/panic.go:261\nruntime.sigpanic\n\t/Users/bba/.gvm/gos/go1.21.0/src/runtime/signal_unix.go:861\ngithub.jparrowsec.cn/pingcap/tidb/pkg/statistics/handle/autoanalyze.tryAutoAnalyzePartitionTableInDynamicMode\n\t/Users/bba/pc/tidb/pkg/statistics/handle/autoanalyze/autoanalyze.go:677\ngithub.jparrowsec.cn/pingcap/tidb/pkg/statistics/handle/autoanalyze.RandomPickOneTableAndTryAutoAnalyze\n\t/Users/bba/pc/tidb/pkg/statistics/handle/autoanalyze/autoanalyze.go:433\ngithub.jparrowsec.cn/pingcap/tidb/pkg/statistics/handle/autoanalyze.HandleAutoAnalyze\n\t/Users/bba/pc/tidb/pkg/statistics/handle/autoanalyze/autoanalyze.go:335\ngithub.jparrowsec.cn/pingcap/tidb/pkg/statistics/handle/autoanalyze.(*statsAnalyze).HandleAutoAnalyze.func1\n\t/Users/bba/pc/tidb/pkg/statistics/handle/autoanalyze/autoanalyze.go:240\ngithub.jparrowsec.cn/pingcap/tidb/pkg/statistics/handle/util.CallWithSCtx\n\t/Users/bba/pc/tidb/pkg/statistics/handle/util/util.go:103\ngithub.jparrowsec.cn/pingcap/tidb/pkg/statistics/handle/autoanalyze.(*statsAnalyze).HandleAutoAnalyze\n\t/Users/bba/pc/tidb/pkg/statistics/handle/autoanalyze/autoanalyze.go:239\ngithub.jparrowsec.cn/pingcap/tidb/pkg/domain.(*Domain).autoAnalyzeWorker\n\t/Users/bba/pc/tidb/pkg/domain/domain.go:2475\ngithub.jparrowsec.cn/pingcap/tidb/pkg/domain.(*Domain).UpdateTableStatsLoop.func4\n\t/Users/bba/pc/tidb/pkg/domain/domain.go:2272\ngithub.jparrowsec.cn/pingcap/tidb/pkg/util.(*WaitGroupEnhancedWrapper).Run.func1\n\t/Users/bba/pc/tidb/pkg/util/wait_group_wrapper.go:99](http://github.com/pingcap/tidb/pkg/statistics/handle/autoanalyze.HandleAutoAnalyze.func1/n/t/Users/bba/pc/tidb/pkg/statistics/handle/autoanalyze/autoanalyze.go:311/nruntime.gopanic/n/t/Users/bba/.gvm/gos/go1.21.0/src/runtime/panic.go:914/nruntime.panicmem/n/t/Users/bba/.gvm/gos/go1.21.0/src/runtime/panic.go:261/nruntime.sigpanic/n/t/Users/bba/.gvm/gos/go1.21.0/src/runtime/signal_unix.go:861/ngithub.jparrowsec.cn/pingcap/tidb/pkg/statistics/handle/autoanalyze.tryAutoAnalyzePartitionTableInDynamicMode/n/t/Users/bba/pc/tidb/pkg/statistics/handle/autoanalyze/autoanalyze.go:677/ngithub.jparrowsec.cn/pingcap/tidb/pkg/statistics/handle/autoanalyze.RandomPickOneTableAndTryAutoAnalyze/n/t/Users/bba/pc/tidb/pkg/statistics/handle/autoanalyze/autoanalyze.go:433/ngithub.jparrowsec.cn/pingcap/tidb/pkg/statistics/handle/autoanalyze.HandleAutoAnalyze/n/t/Users/bba/pc/tidb/pkg/statistics/handle/autoanalyze/autoanalyze.go:335/ngithub.jparrowsec.cn/pingcap/tidb/pkg/statistics/handle/autoanalyze.(*statsAnalyze).HandleAutoAnalyze.func1/n/t/Users/bba/pc/tidb/pkg/statistics/handle/autoanalyze/autoanalyze.go:240/ngithub.jparrowsec.cn/pingcap/tidb/pkg/statistics/handle/util.CallWithSCtx/n/t/Users/bba/pc/tidb/pkg/statistics/handle/util/util.go:103/ngithub.jparrowsec.cn/pingcap/tidb/pkg/statistics/handle/autoanalyze.(*statsAnalyze).HandleAutoAnalyze/n/t/Users/bba/pc/tidb/pkg/statistics/handle/autoanalyze/autoanalyze.go:239/ngithub.jparrowsec.cn/pingcap/tidb/pkg/domain.(*Domain).autoAnalyzeWorker/n/t/Users/bba/pc/tidb/pkg/domain/domain.go:2475/ngithub.jparrowsec.cn/pingcap/tidb/pkg/domain.(*Domain).UpdateTableStatsLoop.func4/n/t/Users/bba/pc/tidb/pkg/domain/domain.go:2272/ngithub.jparrowsec.cn/pingcap/tidb/pkg/util.(*WaitGroupEnhancedWrapper).Run.func1/n/t/Users/bba/pc/tidb/pkg/util/wait_group_wrapper.go:99)"]

4. What is your TiDB version? (Required)