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Implemented TODO [#METR-19266].

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This commit is contained in:
Alexey Milovidov 2017-01-04 07:30:18 +03:00
parent f7fa5b73b9
commit 8074f2de59
1 changed files with 16 additions and 3 deletions
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19
dbms/src/Columns/ColumnNullable.cpp
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@ -38,10 +38,23 @@ void ColumnNullable::updateHashWithValue(size_t n, SipHash & hash) const
}
ColumnPtr ColumnNullable::cloneResized(size_t size) const
ColumnPtr ColumnNullable::cloneResized(size_t new_size) const
{
ColumnPtr new_nested_col = nested_column->cloneResized(size);
ColumnPtr new_null_map = getNullMapConcreteColumn().cloneResized(size); /// TODO Completely wrong.
ColumnPtr new_nested_col = nested_column->cloneResized(new_size);
auto new_null_map = std::make_shared<ColumnUInt8>();
if (new_size > 0)
{
new_null_map->getData().resize(new_size);
size_t count = std::min(size(), new_size);
memcpy(new_null_map->getData().data(), getNullMap().data(), count * sizeof(getNullMap()[0]));
/// If resizing to bigger one, set all new values to NULLs.
if (new_size > count)
memset(&new_null_map->getData()[count], 1, new_size - count);
}
return std::make_shared<ColumnNullable>(new_nested_col, new_null_map);
}