some result is incorrect when plan cache enabled

[lcwangchao]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

> create table t(a int);
> insert into t values(1);
> prepare s from "select * from tx where tidb_parse_tso(a) > unix_timestamp()";
> execute s;

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

The result should be the same with query without prepare execute

TiDB root@127.0.0.1:test> select * from tx where tidb_parse_tso(a) > unix_timestamp();
+---+
| a |
+---+
| 1 |
+---+
1 row in set
Time: 0.006s

TiDB root@127.0.0.1:test> select * from tx where tidb_parse_tso(a) > unix_timestamp();
+---+
| a |
+---+
| 1 |
+---+
1 row in set

3. What did you see instead (Required)

The are different

TiDB root@127.0.0.1:test> select * from tx where tidb_parse_tso(a) > unix_timestamp();
+---+
| a |
+---+
| 1 |
+---+
1 row in set
Time: 0.006s

TiDB root@127.0.0.1:test> execute s;
+---+
| a |
+---+
+---+
0 rows in set
Time: 0.003s

And then if I disable plan cache, the session panics:

TiDB root@127.0.0.1:test> set @@tidb_enable_prepared_plan_cache=0;
Query OK, 0 rows affected
Time: 0.001s
TiDB root@127.0.0.1:test> execute s;
(1105, 'runtime error: invalid memory address or nil pointer dereference')

stack:

[2023/11/01 14:05:42.490 +08:00] [ERROR] [conn.go:965] ["connection running loop panic"] [conn=3391094944] [session_alias=] [lastSQL="execute s"] [err="runtime error: invalid memory address or nil pointer dereference"] [stack="github.com/pingcap/tidb/pkg/server.(*clientConn).Run.func1\n\t/Users/pingcap/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/server/conn.go:968\nruntime.gopanic\n\t/usr/local/go1.21/src/runtime/panic.go:914\ngithub.com/pingcap/tidb/pkg/executor.(*Compiler).Compile.func1\n\t/Users/pingcap/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/compiler.go:55\nruntime.gopanic\n\t/usr/local/go1.21/src/runtime/panic.go:914\nruntime.panicmem\n\t/usr/local/go1.21/src/runtime/panic.go:261\nruntime.sigpanic\n\t/usr/local/go1.21/src/runtime/signal_unix.go:861\ngithub.com/pingcap/tidb/pkg/planner/core.getCachedPlan\n\t/Users/pingcap/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/planner/core/plan_cache.go:264\ngithub.com/pingcap/tidb/pkg/planner/core.GetPlanFromSessionPlanCache\n\t/Users/pingcap/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/planner/core/plan_cache.go:204\ngithub.com/pingcap/tidb/pkg/planner.OptimizeExecStmt\n\t/Users/pingcap/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/planner/optimize.go:552\ngithub.com/pingcap/tidb/pkg/planner.Optimize\n\t/Users/pingcap/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/planner/optimize.go:180\ngithub.com/pingcap/tidb/pkg/executor.(*Compiler).Compile\n\t/Users/pingcap/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/compiler.go:100\ngithub.com/pingcap/tidb/pkg/session.(*session).ExecuteStmt\n\t/Users/pingcap/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/session/session.go:2210\ngithub.com/pingcap/tidb/pkg/server.(*TiDBContext).ExecuteStmt\n\t/Users/pingcap/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/server/driver_tidb.go:292\ngithub.com/pingcap/tidb/pkg/server.(*clientConn).handleStmt\n\t/Users/pingcap/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/server/conn.go:2009\ngithub.com/pingcap/tidb/pkg/server.(*clientConn).handleQuery\n\t/Users/pingcap/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/server/conn.go:1800\ngithub.com/pingcap/tidb/pkg/server.(*clientConn).dispatch\n\t/Users/pingcap/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/server/conn.go:1287\ngithub.com/pingcap/tidb/pkg/server.(*clientConn).Run\n\t/Users/pingcap/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/server/conn.go:1066\ngithub.com/pingcap/tidb/pkg/server.(*Server).onConn\n\t/Users/pingcap/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/server/server.go:701"]

4. What is your TiDB version? (Required)

nighly build, I'm not sure whether it affects released versions

TiDB root@127.0.0.1:test> select tidb_version();
+-----------------------------------------------------------+
| tidb_version()                                            |
+-----------------------------------------------------------+
| Release Version: v7.6.0-alpha                             |
| Edition: Community                                        |
| Git Commit Hash: 30288c77c7e84a9c596a8145dca27748468f9e51 |
| Git Branch: heads/refs/tags/v7.6.0-alpha                  |
| UTC Build Time: 2023-10-27 14:25:48                       |
| GoVersion: go1.21.3                                       |
| Race Enabled: false                                       |
| Check Table Before Drop: false                            |
| Store: tikv                                               |
+-----------------------------------------------------------+
1 row in set
Time: 0.002s