chenhao7253886 commented on a change in pull request #832: Support hll_raw_agg
in Aggregate Function
URL: https://github.com/apache/incubator-doris/pull/832#discussion_r270706537
##########
File path: be/src/exprs/aggregate_functions.cpp
##########
@@ -1114,50 +1115,46 @@ StringVal
AggregateFunctions::hll_finalize(FunctionContext* ctx, const StringVal
}
-void AggregateFunctions::hll_union_agg_init(FunctionContext* ctx, StringVal*
dst) {
- int str_len = std::pow(2, HLL_PRECISION);
- dst->is_null = false;
- dst->ptr = ctx->allocate(str_len);
- dst->len = str_len;
- memset(dst->ptr, 0, str_len);
+void AggregateFunctions::hll_union_agg_init(FunctionContext* ctx, HllVal* dst)
{
+ dst->init(ctx);
}
-void AggregateFunctions::hll_union_parse_and_cal(HllSetResolver& resolver,
StringVal* dst) {
+void AggregateFunctions::hll_union_parse_and_cal(HllSetResolver& resolver,
HllVal* dst) {
Review comment:
hll_union_parse_and_cal can be a member of HllVal， and it support a function
that merge other type or src StringVal, so we will get a better encapsulation
for hll.
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