HappenLee commented on a change in pull request #6971:
URL: https://github.com/apache/incubator-doris/pull/6971#discussion_r744450364
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File path: be/src/olap/hll.h
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@@ -33,6 +33,7 @@ class Slice;
const static int HLL_COLUMN_PRECISION = 14;
const static int HLL_ZERO_COUNT_BITS = (64 - HLL_COLUMN_PRECISION);
const static int HLL_EXPLICIT_INT64_NUM = 160;
+const static int HLL_EXPLICIT_INT64_NUM_DOUBLE = HLL_EXPLICIT_INT64_NUM*2;
Review comment:
HLL_EXPLICIT_INT64_NUM * 2
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File path: be/src/olap/hll.h
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@@ -154,7 +174,7 @@ class HyperLogLog {
HllDataType _type = HLL_DATA_EMPTY;
uint32_t _explicit_data_num = 0;
- uint64_t _explicit_data[HLL_EXPLICIT_INT64_NUM * 2];
+ uint64_t* _explicit_data = nullptr;
Review comment:
directly use the raw ptr is dangerous and complex. Rethink shoule we
replace is use std::unique_ptr
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