### What problem does this PR solve?
Feat: The keys for data manipulation operators can only be numbers,
letters, and underscores. #10427
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Feat: The output is derived based on the configuration of the variable
aggregation operator. #10427
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Feat: Add a form for variable aggregation operators #10427
### Type of change
- [x] New Feature (non-breaking change which adds functionality)