analyze panic with enum column(version2)

[wjhuang2016]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

create a table with enum column.
insert many data, 100 000 rows.
analyze table

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

No error.

3. What did you see instead (Required)

[analyze.go:1235] ["analyze worker panicked"] [stack="goroutine 190694 [running]:\ngithub.com/pingcap/tidb/executor.(*AnalyzeColumnsExec).subBuildWorker.func1(0xc02b216000, 0xc000d10a00, 0x1)\n\t/Users/pingcap/workspace/optimization-build-tidb-darwin-amd@4/go/src/github.com/pingcap/tidb/executor/analyze.go:1233 +0x105\npanic(0x647d000, 0xc000cca2b8)\n\t/usr/local/Cellar/go/1.16.5/libexec/src/runtime/panic.go:965 +0x1b9\ngithub.com/pingcap/tidb/util/chunk.(*Column).getNameValue(0xc052862000, 0x1, 0x8, 0x20300a00000001, 0xc000df1730)\n\t/Users/pingcap/workspace/optimization-build-tidb-darwin-amd@4/go/src/github.com/pingcap/tidb/util/chunk/column.go:572 +0x1a8\ngithub.com/pingcap/tidb/util/chunk.(*Column).GetEnum(...)\n\t/Users/pingcap/workspace/optimization-build-tidb-darwin-amd@4/go/src/github.com/pingcap/tidb/util/chunk/column.go:544\ngithub.com/pingcap/tidb/util/chunk.Row.GetEnum(0xc02a2bafa0, 0x1, 0x0, 0xc01f102003, 0xc02bba5420, 0x32a7e0b0)\n\t/Users/pingcap/workspace/optimization-build-tidb-darwin-amd@4/go/src/github.com/pingcap/tidb/util/chunk/row.go:96 +0x4b\ngithub.com/pingcap/tidb/util/chunk.Row.GetDatum(0xc02a2bafa0, 0x1, 0x0, 0xc02a358660, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)\n\t/Users/pingcap/workspace/optimization-build-tidb-darwin-amd@4/go/src/github.com/pingcap/tidb/util/chunk/row.go:180 +0xa7c\ngithub.com/pingcap/tidb/statistics.(*Histogram).GetUpper(0xc052862070, 0x0, 0xc02b5157a0)\n\t/Users/pingcap/workspace/optimization-build-tidb-darwin-amd@4/go/src/github.com/pingcap/tidb/statistics/histogram.go:123 +0x9e\ngithub.com/pingcap/tidb/statistics.buildHist(0xc00188e900, 0xc052862070, 0xc03f408000, 0x186a0, 0x186a0, 0x2df07, 0x2, 0x100, 0x0, 0xc02e666690, ...)\n\t/Users/pingcap/workspace/optimization-build-tidb-darwin-amd@4/go/src/github.com/pingcap/tidb/statistics/builder.go:160 +0x169\ngithub.com/pingcap/tidb/statistics.BuildHistAndTopN(0x6b7db10, 0xc000e21180, 0x100, 0x1f4, 0x3, 0xc02e064660, 0xc000ef3368, 0xc052f76401, 0xc000e68150, 0xc00116a000, ...)\n\t/Users/pingcap/workspace/optimization-build-tidb-darwin-amd@4/go/src/github.com/pingcap/tidb/statistics/builder.go:364 +0x12cd\ngithub.com/pingcap/tidb/executor.(*AnalyzeColumnsExec).subBuildWorker(0xc000d10a00, 0xc02b216000, 0xc02b216060, 0xc00175c000, 0x44, 0x44, 0xc00175c480, 0x44, 0x44, 0xc0016de000, ...)\n\t/Users/pingcap/workspace/optimization-build-tidb-darwin-amd@4/go/src/github.com/pingcap/tidb/executor/analyze.go:1330 +0x8b7\ncreated by github.com/pingcap/tidb/executor.(*AnalyzeColumnsExec).buildSamplingStats\n\t/Users/pingcap/workspace/optimization-build-tidb-darwin-amd@4/go/src/github.com/pingcap/tidb/executor/analyze.go:934 +0x10f2\n"]

4. What is your TiDB version? (Required)

5.1.1

[knightXun]

/assign @knightXun

[winoros]

Duplicate one with #28051

[github-actions]

Please check whether the issue should be labeled with 'affects-x.y' or 'fixes-x.y.z', and then remove 'needs-more-info' label.