[GitHub] [arrow-datafusion] izveigor opened a new issue, #6935: Reading array elements

["izveigor (via GitHub)" <gi...@apache.org>]

izveigor opened a new issue, #6935:
URL: https://github.com/apache/arrow-datafusion/issues/6935

   ### Is your feature request related to a problem or challenge?
   
   Any element of the array must be read. There are two ways to take elements from an array: through functions and through indices.
   Functions:
   Let's introduce two functions for reading one element and element range:
   - [ ] `array_element(array, i)` (read one element);
   - [ ] `array_slice(array, i, j)` (read element range);
   
   Index improvements:
   - [ ] additional key for slices (`array[i:j]`);
   - [ ] multiple index support (`array[0][0][0][0]`)
   - [ ] negative indices (`array[-1]`);
   - [ ] support for names indexes (`array[a]`);
   - [ ] arithmetic operations within an index (`array[1 + 2:3 + 4]`);
   
   ### Describe the solution you'd like
   
   _No response_
   
   ### Describe alternatives you've considered
   
   _No response_
   
   ### Additional context
   
   _No response_


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