Applies to: Databricks SQL Databricks Runtime 11.2 and above
Returns the center of the input H3 cell as a point in WKT format.
h3CellIdExpr: A BIGINT expression, or a hexadecimal STRING expression representing an H3 cell ID.
A value of the type STRING representing the center of the input H3 cell as a point in WKT format.
The function returns NULL if the input expression is NULL.
The function does partial validation regarding whether or not the input argument is a valid H3 cell ID. A necessary, but not sufficient condition for a valid H3 ID is that its value is between
The behavior of the function is undefined if the input cell ID is not a valid cell ID.
h3CellIdExpris a STRING that cannot be converted to a BIGINT or corresponds to a BIGINT value that is either smaller than
0x08001fffffffffffor larger than
0x08ff3b6db6db6db6, the function returns H3_INVALID_CELL_ID.
-- Input a BIGINT representing a hexagonal cell.
> SELECT h3_centeraswkt(599686042433355775)
-- Input a STRING representing a pentagonal cell.
> SELECT h3_centeraswkt('8009fffffffffff')
-- Input is an invalid H3 cell ID.
> SELECT h3_centeraswkt(0)
[H3_INVALID_CELL_ID] 0 is not a valid H3 cell ID