executor: use sys session to build view for info_schema.columns retrieval (#33946)

[ti-srebot]

cherry-pick #33946 to release-5.2
You can switch your code base to this Pull Request by using git-extras:

# In tidb repo:
git pr https://github.com/pingcap/tidb/pull/34251

After apply modifications, you can push your change to this PR via:

git push git@github.com:ti-srebot/tidb.git pr/34251:release-5.2-f16f0e844de4

---

What problem does this PR solve?

Issue Number: close #32459

Problem Summary:

From the panic cases related to information_schema.columns we encountered recently, the stack is like:

goroutine 656 [running]:
runtime.throw({0x103052e20, 0x15})
        /opt/homebrew/Cellar/go/1.17.5/libexec/src/runtime/panic.go:1198 +0x54 fp=0x14015deee20 sp=0x14015deedf0 pc=0x1008ced04
runtime.mapassign_fast64ptr(0x1036021e0, 0x14015c478c0, 0x140107b0900)
        /opt/homebrew/Cellar/go/1.17.5/libexec/src/runtime/map_fast64.go:266 +0x3c8 fp=0x14015deee80 sp=0x14015deee20 pc=0x1008a6bd8
github.com/pingcap/tidb/planner/core.(*PlanBuilder).buildDataSource(0x14013e55d40, {0x103aaf4d0, 0x14013d17f20}, 0x14015d56410, 0x14015df4050)
        /Users/tangenta/gopath/src/github.com/pingcap/tidb/planner/core/logical_plan_builder.go:4315 +0x30b0 fp=0x14015defed0 sp=0x14015deee80 pc=0x10228ec10
github.com/pingcap/tidb/planner/core.(*PlanBuilder).buildResultSetNode(0x14013e55d40, {0x103aaf4d0, 0x14013d17f20}, {0x103ad2ea8, 0x14015df4000})
        /Users/tangenta/gopath/src/github.com/pingcap/tidb/planner/core/logical_plan_builder.go:348 +0x2dc fp=0x14015df0410 sp=0x14015defed0 pc=0x10225d3ac
github.com/pingcap/tidb/planner/core.(*PlanBuilder).buildJoin(0x14013e55d40, {0x103aaf4d0, 0x14013d17f20}, 0x14010b60ab0)
        /Users/tangenta/gopath/src/github.com/pingcap/tidb/planner/core/logical_plan_builder.go:669 +0xe28 fp=0x14015df0c20 sp=0x14015df0410 pc=0x102262848
github.com/pingcap/tidb/planner/core.(*PlanBuilder).buildResultSetNode(0x14013e55d40, {0x103aaf4d0, 0x14013d17f20}, {0x103ad22f8, 0x14010b60ab0})
        /Users/tangenta/gopath/src/github.com/pingcap/tidb/planner/core/logical_plan_builder.go:335 +0x7b0 fp=0x14015df1160 sp=0x14015df0c20 pc=0x10225d880
github.com/pingcap/tidb/planner/core.(*PlanBuilder).buildTableRefs(0x14013e55d40, {0x103aaf4d0, 0x14013d17f20}, 0x14015d78780)
        /Users/tangenta/gopath/src/github.com/pingcap/tidb/planner/core/logical_plan_builder.go:329 +0xb4 fp=0x14015df1270 sp=0x14015df1160 pc=0x10225cf54
github.com/pingcap/tidb/planner/core.(*PlanBuilder).buildSelect(0x14013e55d40, {0x103aaf4d0, 0x14013d17f20}, 0x14015d4db00)
        /Users/tangenta/gopath/src/github.com/pingcap/tidb/planner/core/logical_plan_builder.go:3624 +0x760 fp=0x14015df1de0 sp=0x14015df1270 pc=0x102287440
github.com/pingcap/tidb/planner/core.(*PlanBuilder).Build(0x14013e55d40, {0x103aaf4d0, 0x14013d17f20}, {0x103acacc0, 0x14015d4db00})
        /Users/tangenta/gopath/src/github.com/pingcap/tidb/planner/core/planbuilder.go:700 +0xa3c fp=0x14015df22e0 sp=0x14015df1de0 pc=0x1022f332c
github.com/pingcap/tidb/planner/core.(*PlanBuilder).BuildDataSourceFromView(0x14013e55d40, {0x103aaf4d0, 0x14013d17f20}, {{0x1401077ede0, 0x4}, {0x1401077ede4, 0x4}}, 0x140107b0a80)
        /Users/tangenta/gopath/src/github.com/pingcap/tidb/planner/core/logical_plan_builder.go:4597 +0x3f0 fp=0x14015df2770 sp=0x14015df22e0 pc=0x102293ce0
github.com/pingcap/tidb/executor.tryFillViewColumnType({0x103aaf4d0, 0x14013d17f20}, {0x103b212b0, 0x14010b7b680}, {0x103aeccc8, 0x14000331110}, {{0x1401077ede0, 0x4}, {0x1401077ede4, 0x4}}, ...)
        /Users/tangenta/gopath/src/github.com/pingcap/tidb/executor/show.go:1901 +0x134 fp=0x14015df28c0 sp=0x14015df2770 pc=0x102c65d14
github.com/pingcap/tidb/executor.(*hugeMemTableRetriever).dataForColumnsInTable(0x14015d5dd50, {0x103aaf4d0, 0x14013d17f20}, {0x103b212b0, 0x14010b7b680}, 0x14000330700, 0x140107b0a80, 0x201c, 0x14013e21810)
        /Users/tangenta/gopath/src/github.com/pingcap/tidb/executor/infoschema_reader.go:680 +0xf8 fp=0x14015df3100 sp=0x14015df28c0 pc=0x102ba2368
github.com/pingcap/tidb/executor.(*hugeMemTableRetriever).setDataForColumns(0x14015d5dd50, {0x103aaf4d0, 0x14013d17f20}, {0x103b212b0, 0x14010b7b680}, 0x14013e21810)
        /Users/tangenta/gopath/src/github.com/pingcap/tidb/executor/infoschema_reader.go:669 +0x21c fp=0x14015df3230 sp=0x14015df3100 pc=0x102ba20cc
github.com/pingcap/tidb/executor.(*hugeMemTableRetriever).retrieve(0x14015d5dd50, {0x103aaf4d0, 0x14013d17f20}, {0x103b212b0, 0x14010b7b680})
        /Users/tangenta/gopath/src/github.com/pingcap/tidb/executor/infoschema_reader.go:2614 +0x300 fp=0x14015df3370 sp=0x14015df3230 pc=0x102bbaf00
github.com/pingcap/tidb/executor.(*MemTableReaderExec).Next(0x14010bcfdd0, {0x103aaf4d0, 0x14013d17f20}, 0x14015d3d950)
        /Users/tangenta/gopath/src/github.com/pingcap/tidb/executor/memtable_reader.go:118 +0x390 fp=0x14015df3570 sp=0x14015df3370 pc=0x102c0bd30
github.com/pingcap/tidb/executor.Next({0x103aaf4d0, 0x14013d17f20}, {0x103ab6758, 0x14010bcfdd0}, 0x14015d3d950)
        /Users/tangenta/gopath/src/github.com/pingcap/tidb/executor/executor.go:302 +0x61c fp=0x14015df3830 sp=0x14015df3570 pc=0x102b60efc
github.com/pingcap/tidb/executor.(*SelectionExec).Next(0x14015d560d0, {0x103aaf4d0, 0x14013d17f20}, 0x14015d78730)
        /Users/tangenta/gopath/src/github.com/pingcap/tidb/executor/executor.go:1394 +0x2bc fp=0x14015df39f0 sp=0x14015df3830 pc=0x102b6874c
github.com/pingcap/tidb/executor.Next({0x103aaf4d0, 0x14013d17f20}, {0x103ab6bd8, 0x14015d560d0}, 0x14015d78730)
        /Users/tangenta/gopath/src/github.com/pingcap/tidb/executor/executor.go:302 +0x61c fp=0x14015df3cb0 sp=0x14015df39f0 pc=0x102b60efc
github.com/pingcap/tidb/executor.(*HashJoinExec).fetchBuildSideRows(0x14015d3ab40, {0x103aaf4d0, 0x14013d17f20}, 0x140111bf4a0, 0x14000a7d6e0)
        /Users/tangenta/gopath/src/github.com/pingcap/tidb/executor/join.go:282 +0x23c fp=0x14015df3e90 sp=0x14015df3cb0 pc=0x102beb1bc
github.com/pingcap/tidb/executor.(*HashJoinExec).fetchAndBuildHashTable.func2()
        /Users/tangenta/gopath/src/github.com/pingcap/tidb/executor/join.go:731 +0xd4 fp=0x14015df3f50 sp=0x14015df3e90 pc=0x102bf00c4
github.com/pingcap/tidb/util.WithRecovery(0x14015d7f500, 0x14015ca3e10)
        /Users/tangenta/gopath/src/github.com/pingcap/tidb/util/misc.go:100 +0x5c fp=0x14015df3fc0 sp=0x14015df3f50 pc=0x101944b2c
runtime.goexit()
        /opt/homebrew/Cellar/go/1.17.5/libexec/src/runtime/asm_arm64.s:1133 +0x4 fp=0x14015df3fc0 sp=0x14015df3fc0 pc=0x1009071d4
created by github.com/pingcap/tidb/executor.(*HashJoinExec).fetchAndBuildHashTable
        /Users/tangenta/gopath/src/github.com/pingcap/tidb/executor/join.go:728 +0x280

All of these stacks have the common function: tryFillViewColumnType and fetchBuildSideRows.

• tryFillViewColumnType is used to extract the field type of a view in information_schema.columns.
• fetchBuildSideRows is used by HashJoinExec to get the build side of the result. It is run concurrently with fetchProbeSideChunks to speed up the query.

As explained in #32618, the root cause is: the goroutines created by HashJoinExec concurrently accessed a field in the same session.

What is changed and how it works?

This PR uses a system session to tryFillViewColumnType, preventing the same session is accessed concurrently.

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

Fix an issue that panic when joining `information_schema.columns` tables.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• hawkingrei
• wshwsh12

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[ti-srebot]

/run-all-tests

[ti-srebot]

@tangenta you're already a collaborator in bot's repo.

[VelocityLight]

This pull request is closed because it's related version has closed automatic cherry-picking.
If it's still needed, you can reopen it or just regenerate it using bot,
see:

• https://prow.tidb.io/command-help#cherrypick
• https://book.prow.tidb.net/#/plugins/cherrypicker

You can find more details at:

• https://internals.tidb.io/t/topic/785

[hawkingrei]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: b0300c2

[hawkingrei]

/retest

[tangenta]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: c42cf52