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Fix distributed group by LowCardinality(Nullable). #3615

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This commit is contained in:
Nikolai Kochetov 2018-11-21 21:30:29 +03:00
parent 43b099f20b
commit 4d96e88058
1 changed files with 1 additions and 1 deletions
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2
dbms/src/Columns/ColumnUnique.h
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@ -305,7 +305,7 @@ StringRef ColumnUnique<ColumnType>::serializeValueIntoArena(size_t n, Arena & ar
size_t nested_size = 0;
if (n == getNullValueIndex())
if (n != getNullValueIndex())
nested_size = column_holder->serializeValueIntoArena(n, arena, begin).size;
return StringRef(pos, sizeof(null_flag) + nested_size);