citusdata / citusdata/postgresql-hll
Using hll_cardinality(hll_union_agg(users)) with OVER partition by
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Description
Hi,
There is an example about using #hll_union_agg(users) OVER (ORDER BY date ASC ROWS 6 PRECEDING).
However if I try to use it with OVER(partition by date) it does not work: `ERROR: column "users" must appear in the GROUP BY clause or be used in an aggregate function`.
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