HLL_EMPTY
HLL_EMPTYβ
descriptionβ
Syntaxβ
HLL_EMPTY(value)
HLL_EMPTY returns a null value of type hll.
exampleβ
MySQL > select hll_cardinality(hll_empty());
+------------------------------+
| hll_cardinality(hll_empty()) |
+------------------------------+
| 0 |
+------------------------------+
keywordsβ
HLL,HLL_EMPTY