[Feature] 有bitmap_from_base64函数为什么没有hll等其他sketche的转换函数？

[lukoou3]

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Description

有bitmap_from_base64函数为什么没有hll等其他sketche的转换函数?

我想要直接写入hll类型，而不是使用HLL_HASH函数转换通过明细导入

我需要直接写入hll等聚合函数中间状态类型，就类似clickhouse的AggregateFunction类型支持写入任何聚合函数的中间聚合状态，只需要写入的字节数组符合对应聚合函数序列化格式就能直接写入。

Use case

通过HLL_HASH函数导入hll类型，原始导入数据太多，直接导入hll类型导入数据会少很多。

打算把数据从druid和clickhouse迁移到doris，发现doris不是能直接写入所有的聚合函数类型。

Related issues

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• Yes I am willing to submit a PR!

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[superdiaodiao]

Hey, there~
hll_from_base64(), hll_to_base64() is on the way:
#32089

[lukoou3]

ok.
I hope that QUANTILE-STATE can also implement a similar function for counting commonly used quantiles