> ## Documentation Index
> Fetch the complete documentation index at: https://docs.wherobots.com/llms.txt
> Use this file to discover all available pages before exploring further.
# ST_H3KRing
return the result of H3 function [gridDisk(cell, k)](https://h3geo.org/docs/api/traversal#griddisk).
K means `the distance of the origin index`, `gridDisk(cell, k)` return cells with distance `<=k` from the original cell.
`exactRing : Boolean`, when set to `true`, sedona will remove the result of `gridDisk(cell, k-1)` from the original results,
means only keep the cells with distance exactly `k` from the original cell
## Signatures
```sql theme={"system"}
ST_H3KRing(cell: Long, k: Int, exactRing: Boolean)
```
## Parameters
The cell value.
The k value.
The exact ring value.
## Return type
An integer value.
## Example
```sql theme={"system"}
SELECT ST_H3KRing(ST_H3CellIDs(ST_GeomFromWKT('POINT(1 2)'), 8, true)[0], 1, true) cells union select ST_H3KRing(ST_H3CellIDs(ST_GeomFromWKT('POINT(1 2)'), 8, true)[0], 1, false) cells
```
```
+--------------------------------------------------------------------------------------------------------------------------------------------+
|cells |
+--------------------------------------------------------------------------------------------------------------------------------------------+
|[614552597293957119, 614552609329512447, 614552609316929535, 614552609327415295, 614552609287569407, 614552597289762815] |
|[614552609325318143, 614552597293957119, 614552609329512447, 614552609316929535, 614552609327415295, 614552609287569407, 614552597289762815]|
+--------------------------------------------------------------------------------------------------------------------------------------------+
```
