basalt-26.3.2-rc-20260914: sql/tests: TestSplitAtTableBoundary failed

sql/tests.TestSplitAtTableBoundary [failed](https://mesolite.cluster.engflow.com/invocations/default/ea8e7bda-f51e-410c-842a-ebf7815833f1?testReportRun=2&testReportShard=16&testReportAttempt=1#targets-Ly9wa2cvc3FsL3Rlc3RzOnRlc3RzX3Rlc3Q=) on basalt-26.3.2-rc-20260914 @ [d3eb08ebdd1dacc8d3dac0b107a7db5929e09969](https://github.com/cockroachdb/cockroach/commits/d3eb08ebdd1dacc8d3dac0b107a7db5929e09969):

```
=== RUN TestSplitAtTableBoundary
test_log_scope.go:172: test logs captured to: outputs.zip/logTestSplitAtTableBoundary3135580310
test_log_scope.go:82: use -show-logs to present logs inline
test_server_shim.go:168: automatically injected a shared process virtual cluster under test; see comment at top of test_server_shim.go for details.
```

Parameters:
- attempt=1
- race=true
- run=2
- shard=16
Help

See also: [How To Investigate a Go Test Failure \(internal\)](https://cockroachlabs.atlassian.net/l/c/HgfXfJgM)

Same failure on other branches

- #175463 sql/tests: TestSplitAtTableBoundary failed [C-test-failure O-robot T-sql-queries branch-master]
- #175422 basalt-26.3.2-rc-20260913: sql/tests: TestSplitAtTableBoundary failed [OOM] [C-test-failure O-robot T-sql-queries branch-basalt-26.3.2-rc-20260913]
- #174997 basalt-26.3.2-rc-20260908: sql/tests: TestSplitAtTableBoundary failed [OOM] [C-test-failure O-robot T-sql-queries branch-basalt-26.3.2-rc-20260908]
- #174915 basalt-26.3.2-rc-20260908: sql/tests: TestSplitAtTableBoundary failed [C-test-failure O-robot T-sql-queries branch-basalt-26.3.2-rc-20260908]
- #174818 release-26.3: sql/tests: TestSplitAtTableBoundary failed [C-test-failure O-robot T-sql-queries branch-release-26.3]
- #174815 release-26.2: sql/tests: TestSplitAtTableBoundary failed [OOM] [C-test-failure O-robot T-sql-queries branch-release-26.2]
- #174697 basalt-26.3: sql/tests: TestSplitAtTableBoundary failed [C-test-failure O-robot T-sql-queries branch-basalt-26.3]

[This test on roachdash](https://roachdash.crdb.dev/?filter=status:open%20t:.*TestSplitAtTableBoundary.*&sort=title+created&display=lastcommented+project) | [Improve this report!](https://github.com/cockroachdb/cockroach/tree/master/pkg/cmd/bazci/githubpost/issues)

Start with sql/tests.TestSplitAtTableBoundary and the linked test-report invocation; inspect the captured logs and rerun the test with race detection enabled. Compare the repeated failures listed in the issue to determine the cause. Done means the test passes reliably in the affected configurations without recurring failures.

Written by the indexing model from the issue text.