[**BestPractice**]

Error handling inconsistency: The schema deserialization logic handles empty strings and "null" values differently across the codebase. In the SQLite implementation, it checks for both conditions, but other parts of the code may not handle these edge cases consistently.

```rust
match first_row.get::<Option<&str>, _>(7) {
    Some(json_str) if !json_str.trim().is_empty() && json_str.trim() != "null" => {
        // This logic should be centralized in a helper function
        // to ensure consistency across all schema deserialization points
    }
    // ...
}
```

Consider creating a centralized `deserialize_schema_from_db` helper function to ensure consistent handling of these edge cases.

File: rust/sysdb/src/sqlite.rs
Line: 844

[**BestPractice**]

Potential null database migration issue: The code checks `if applied_migrations.len() > source_migrations.len()` and returns empty migrations, but this could mask real migration problems. If the database has more applied migrations than source migrations, this suggests a version mismatch or corrupted migration state that should be explicitly handled.

<details>
<summary>Suggested Change</summary>

```suggestion
// Check if database has more applied migrations than available source migrations
if applied_migrations.len() > source_migrations.len() {
    return Err(SqliteError::MigrationVersionMismatch(
        format!(
            "Database has {} applied migrations but only {} source migrations available", 
            applied_migrations.len(), 
            source_migrations.len()
        )
    ));
}
```

⚡ **Committable suggestion**

Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation.

</details>

File: rust/sqlite/src/db.rs
Line: 159