shengyunyao commented on a change in pull request #1939: Added: Add tdigest
compression param for pencentile_approx function
URL: https://github.com/apache/incubator-doris/pull/1939#discussion_r333880955
##########
File path: be/src/exprs/aggregate_functions.cpp
##########
@@ -234,19 +234,29 @@ void AggregateFunctions::avg_update(FunctionContext*
ctx, const T& src, StringVa
struct PercentileApproxState {
public:
- PercentileApproxState() : digest(new TDigest()){
- }
+ PercentileApproxState() : digest(new TDigest()) {}
+ PercentileApproxState(double compression) : digest(new
TDigest(compression)) {}
~PercentileApproxState() {
delete digest;
}
-
+
TDigest *digest = nullptr;
double targetQuantile = -1.0;
};
void AggregateFunctions::percentile_approx_init(FunctionContext* ctx,
StringVal* dst) {
dst->is_null = false;
dst->len = sizeof(PercentileApproxState);
+ std::cout << ctx->get_num_args() << std::endl;
Review comment:
done
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