SQL
Indexes as Parameters
All lambda functions accept an optional extra parameter that represents the index of the current element.
This is always the last parameter of the lambda function, and is 1-based (i.e., the first element has index 1).  
_Get all elements that are larger than their index:_  
```sql
SELECT list_filter([1, 3, 1, 5], (x, i) -> x > i);
```  
```text
[3, 5]
```