% This is generated by ESQL's AbstractFunctionTestCase. Do not edit it. See ../README.md for how to regenerate it.

**Description**

Converts an input value to a `geohex` value. A string will only be successfully converted if it respects the `geohex` format, as described for the [geohex grid aggregation](/reference/aggregations/search-aggregations-bucket-geohexgrid-aggregation.md).