I m trying to find all the parents, grandparents, etc. of a particular field with any depth. For example, given the below structure, if I provide 5, the values returned should be 1, 2, 3 and 4.
| a | b | ----------- | 1 | 2 | | 2 | 3 | | 3 | 4 | | 4 | 5 | | 3 | 6 | | 4 | 7 |
How would I do this?