ClickHouse/01016_uniqCombined64.reference at 56d3cd535dc527f2953cd310aaa7c1b7b600e9c5 - ClickHouse - gitea@var1able.network

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Azat Khuzhin f46c5a47c0 Introduce uniqCombined64() to get sane results for cardinality > UINT_MAX

By default uniqCombined() uses 32-bit hash for all types except String,
so this means that you cannot use uniqCombined() with i.e UInt64 and
cardinality > UINT_MAX, although you can use uniqCombined(toString())
and this will lead to 64-bit hash, but will not have good performance.

So uniqCombined64() had been introduced to fix this.

Requires: #7213

2019-10-08 21:59:35 +03:00

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