hll_hash
Description
Converts a value to an hll type. Typically used in imports to map a value in the source data to an HLL column type in the StarRocks table.
Syntax
HLL_HASH(column_name)
Parameters
column_name
: The name of the generated HLL column.
Return value
Returns a value of the HLL type.
Example
mysql> select hll_cardinality(hll_hash("a"));
+--------------------------------+
| hll_cardinality(hll_hash('a')) |
+--------------------------------+
| 1 |
+--------------------------------+