Query failed after adding round function.

## About the bug

**Steps to reproduce:**
List the minimal actions needed to reproduce the behavior.

1. ...
2. ...
3. ...

**Expected behavior:**

**Actual behavior:**

**Visual Proof:**

## About your environment

**Environment info:**

**Config:**

**Logs:**

**Performance:**
Generate profiles with the following commands for bugs related to performance, locking, out of memory (OOM), etc.

```sh
# Commands should be run when the bug is actively.
# Note: This command will run for at least 30 seconds.
curl -o profiles.tar.gz "http://localhost:8086/debug/pprof/all?cpu=true"
curl -o vars.txt "http://localhost:8086/debug/vars"
iostat -xd 1 30 > iostat.txt
# Attach the `profiles.tar.gz`, `vars.txt`, and `iostat.txt` output files.
```

The issue provides no reproduction steps, expected or actual behavior, environment details, files, tests, or entry points. First obtain a minimal reproduction for the query containing the round function and confirm the affected InfluxDB and UI versions. Done cannot be defined until the failure and expected result are documented.

Written by the indexing model from the issue text.