25.8.15 Backport of #89367: Crash in IN function where columns have different types and many columns are involved

[zvonand]

Changelog category (leave one):

• Bug Fix (user-visible misbehavior in an official stable release)

Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md):

Possible crash/undefined behavior in IN function where primary key column types are different from IN function right side column types (ClickHouse#89367 by @ilejn)

CI/CD Options

Exclude tests:

• Fast test
• Integration Tests
• Stateless tests
• Stateful tests
• Performance tests
• All with ASAN
• All with TSAN
• All with MSAN
• All with UBSAN
• All with Coverage
• All with Aarch64
• All Regression
• Disable CI Cache

Regression jobs to run:

• Fast suites (mostly <1h)
• Aggregate Functions (2h)
• Alter (1.5h)
• Benchmark (30m)
• ClickHouse Keeper (1h)
• Iceberg (2h)
• LDAP (1h)
• Parquet (1.5h)
• RBAC (1.5h)
• SSL Server (1h)
• S3 (2h)
• Tiered Storage (2h)

[github-actions]

Workflow [PR], commit [a80599f]

[zvonand]

S3 fails: Altinity/clickhouse-regression#93

Aggregate fails: uniqTheta was updated in upstream, not related, test will be updated separately by QA team

[DimensionWieldr]

CI Failure Analysis

1. Regression Tests (aggregate_functions_1, S3 suites) - Pre-existing Failures

Failures: uniqTheta, zero copy replication

Evidence these are pre-existing on base branch (releases/25.8.15) MasterCI #21579463803:

• AggregateFunctions (1) = failure (x86_64 + aarch64)
• S3 (aws_s3, 2) = failure (x86_64 + aarch64)
• S3 (azure, 2) = failure (x86_64 + aarch64)
• S3 (minio, 2) = failure (x86_64 + aarch64)

Verdict: Pre-existing failures on base branch. Unrelated to PR changes.

---

2. Alter Tests (alter_attach_1, alter_replace) - Infrastructure Errors

alter_attach_1 (x86_64):

Code: 745. DB::Exception: CPU is overloaded... (SERVER_OVERLOADED)

alter_replace (x86_64):

Code: 999. DB::Exception: Coordination::Exception: Transaction failed (No node)... (KEEPER_EXCEPTION)

Evidence: alter_replace passes on aarch64, confirming infrastructure flakiness rather than code bug.

Verdict: CI infrastructure issues (CPU exhaustion, ZooKeeper failure). Unrelated to PR changes.

---

3. Stateless tests (amd_asan, flaky check) - Infrastructure

Failure: failure: Start ClickHouse Server

Verdict: CI infrastructure issue during server initialization. Unrelated to PR changes.

---

4. Integration tests (amd_tsan, 1/6) - Flaky Test

Failure: test_system_flush_logs/test.py::test_system_logs_exists (1 of 720 tests)

Analysis: This test checks system table existence. No code path overlap with this PR's changes to KeyCondition.cpp (IN function handling) or sortBlock.cpp (debug assertion).

Verdict: Flaky test, unrelated to PR changes.

---

Summary

Test Category	Failure Type	Related to PR?
Regression (8 jobs)	Pre-existing failures	No
Alter tests (2 jobs)	Infrastructure errors	No
Flaky check	Server startup	No
Integration (amd_tsan, 1/6)	Flaky test	No

Verdict: All failures are unrelated to the PR changes.