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Update weak hash.

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This commit is contained in:
Nikolai Kochetov 2020-03-24 14:29:55 +03:00
parent 20d3e34fb0
commit 07b29453cc
1 changed files with 2 additions and 0 deletions
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dbms/src/Columns/ColumnArray.cpp
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@ -232,6 +232,8 @@ void ColumnArray::updateWeakHash32(WeakHash32 & hash) const
for (size_t i = 0; i < s; ++i)
{
hash_data[i] = intHashCRC32(hash_data[i]);
for (size_t row = prev_offset; row < offsets_data[i]; ++row)
/// It is probably not the best way to combine hashes.
/// But much better then xor which lead to similar hash for arrays like [1], [1, 1, 1], [1, 1, 1, 1, 1], ...