Method updateObjectColumns

src/Storages/MergeTree/MergeTreeData.cpp:4740–4747

}

void MergeTreeData::updateObjectColumns(const DataPartPtr & part, const DataPartsLock & /*lock*/)
{
    auto metadata_snapshot = getInMemoryMetadataPtr();
    if (!metadata_snapshot->hasDynamicSubcolumns())
        return;

    DB::updateObjectColumns(object_columns, metadata_snapshot->getColumns(), part->getColumns());
}

ColumnsDescription MergeTreeData::getConcreteObjectColumns(
    const DataPartsVector & parts, const ColumnsDescription & storage_columns)