Panic triggered at expression.ExplainExpressionList (planner/core/explain.go:335) #42587
Description
Bug Report
Please answer these questions before submitting your issue. Thanks!
1. Minimal reproduce step (Required)
Setup the environment:
~/tidb/bin/tidb-server &
mysql -h "127.0.0.1" -u root -P 4000 -D testdb < mysql_bk.sql
mysql_bk.sql: mysql_bk.txt
Testcase
select
ref_39.c17 as c0
from
(t1 as ref_39
left outer join t2 as ref_40
on (ref_39.c13 = ref_40.vkey ))
where (case when exists (
select
ref_73.c9 as c0
from
t1 as ref_73
union
select
null + 83 as c0
from
t6 as ref_77
where (ref_40.pkey = null) and (2 > (
select 1 as c0
from
t1 as ref_85
where exists (
select
ref_103.c25 as c0
from
t3 as ref_103
where ref_85.c13 = ref_103.c25
)
limit 1
))
) then null else 1 end
) >= 1;
2. What did you expect to see? (Required)
No panic.
3. What did you see instead (Required)
ERROR 1105 (HY000): runtime error: index out of range [0] with length 0
Log of TiDB server:
[ERROR] [conn.go:1039] ["connection running loop panic"] [conn=2199023260581] [lastSQL="select
ref_39.c17 as c0
from
(t1 as ref_39
left outer join t2 as ref_40
on (ref_39.c13 = ref_40.vkey ))
where (case when exists (
select
ref_73.c9 as c0
from
t1 as ref_73
union
select
null + 83 as c0
from
t6 as ref_77
where (ref_40.pkey = null) and (2 > (
select 1 as c0
from
t1 as ref_85
where exists (
select
ref_103.c25 as c0
from
t3 as ref_103
where ref_85.c13 = ref_103.c25
)
limit 1
))
) then null else 1 end
) >= 1"] [err="runtime error: index out of range [0] with length 0"] [stack="github.com/pingcap/tidb/server.(*clientConn).Run.func1
/root/tidb/server/conn.go:1042
runtime.gopanic
/usr/local/go/src/runtime/panic.go:884
runtime.goPanicIndex
/usr/local/go/src/runtime/panic.go:113
github.com/pingcap/tidb/expression.ExplainExpressionList
/root/tidb/expression/explain.go:122
github.com/pingcap/tidb/planner/core.(*PhysicalProjection).ExplainInfo
/root/tidb/planner/core/explain.go:335
github.com/pingcap/tidb/planner/core.(*Explain).getOperatorInfo
/root/tidb/planner/core/common_plans.go:1138
github.com/pingcap/tidb/planner/core.(*Explain).prepareOperatorInfo
/root/tidb/planner/core/common_plans.go:1051
github.com/pingcap/tidb/planner/core.(*Explain).explainFlatOpInRowFormat
/root/tidb/planner/core/common_plans.go:987
github.com/pingcap/tidb/planner/core.(*Explain).explainFlatPlanInRowFormat
/root/tidb/planner/core/common_plans.go:936
github.com/pingcap/tidb/planner/core.(*Explain).RenderResult
/root/tidb/planner/core/common_plans.go:888
github.com/pingcap/tidb/planner/core.GetExplainRowsForPlan
/root/tidb/planner/core/common_plans.go:761
github.com/pingcap/tidb/session.(*session).SetProcessInfo
/root/tidb/session/session.go:1545
github.com/pingcap/tidb/server.(*clientConn).dispatch.func2
/root/tidb/server/conn.go:1297
runtime.gopanic
/usr/local/go/src/runtime/panic.go:890
github.com/pingcap/tidb/executor.(*ExecStmt).Exec.func1
/root/tidb/executor/adapter.go:459
runtime.gopanic
/usr/local/go/src/runtime/panic.go:884
runtime.goPanicIndex
/usr/local/go/src/runtime/panic.go:113
github.com/pingcap/tidb/expression.ExplainExpressionList
/root/tidb/expression/explain.go:122
github.com/pingcap/tidb/planner/core.(*PhysicalProjection).ExplainInfo
/root/tidb/planner/core/explain.go:335
github.com/pingcap/tidb/planner/core.(*Explain).getOperatorInfo
/root/tidb/planner/core/common_plans.go:1138
github.com/pingcap/tidb/planner/core.(*Explain).prepareOperatorInfo
/root/tidb/planner/core/common_plans.go:1051
github.com/pingcap/tidb/planner/core.(*Explain).explainFlatOpInRowFormat
/root/tidb/planner/core/common_plans.go:987
github.com/pingcap/tidb/planner/core.(*Explain).explainFlatPlanInRowFormat
/root/tidb/planner/core/common_plans.go:936
github.com/pingcap/tidb/planner/core.(*Explain).RenderResult
/root/tidb/planner/core/common_plans.go:888
github.com/pingcap/tidb/planner/core.GetExplainRowsForPlan
/root/tidb/planner/core/common_plans.go:761
github.com/pingcap/tidb/session.(*session).SetProcessInfo
/root/tidb/session/session.go:1545
github.com/pingcap/tidb/executor.(*ExecStmt).Exec
/root/tidb/executor/adapter.go:553
github.com/pingcap/tidb/session.runStmt
/root/tidb/session/session.go:2332
github.com/pingcap/tidb/session.(*session).ExecuteStmt
/root/tidb/session/session.go:2189
github.com/pingcap/tidb/server.(*TiDBContext).ExecuteStmt
/root/tidb/server/driver_tidb.go:252
github.com/pingcap/tidb/server.(*clientConn).handleStmt
/root/tidb/server/conn.go:2054
github.com/pingcap/tidb/server.(*clientConn).handleQuery
/root/tidb/server/conn.go:1851
github.com/pingcap/tidb/server.(*clientConn).dispatch
/root/tidb/server/conn.go:1337
github.com/pingcap/tidb/server.(*clientConn).Run
/root/tidb/server/conn.go:1120
github.com/pingcap/tidb/server.(*Server).onConn
/root/tidb/server/server.go:675"]
4. What is your TiDB version? (Required)
+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Release Version: v7.1.0-alpha-27-gf5ca27ef3
Edition: Community
Git Commit Hash: f5ca27e
Git Branch: master
UTC Build Time: 2023-03-23 13:57:53
GoVersion: go1.20.2
Race Enabled: false
TiKV Min Version: 6.2.0-alpha
Check Table Before Drop: false
Store: unistore |
+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+