GROUP BY Nullable(UInt256): wrong result #14141
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SELECT toNullable(toUInt256(123)) AS k
GROUP BY k
┌────────────────────────────────────────────────────────────────────k─┐
│ 26050106480830410844870090986039688399620648588929830570151859191848 │
└──────────────────────────────────────────────────────────────────────┘