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fix corner case

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This commit is contained in:
Anton Popov 2024-05-29 13:49:48 +00:00
parent d5a0c873c7
commit f3c735cad0
1 changed files with 1 additions and 1 deletions
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src/Storages/MergeTree/MergeTask.cpp
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@ -572,7 +572,7 @@ bool MergeTask::VerticalMergeStage::prepareVerticalMergeForAllColumns() const
bool all_parts_on_remote_disks = std::ranges::all_of(global_ctx->future_part->parts, [](const auto & part) { return part->isStoredOnRemoteDisk(); });
ctx->use_prefetch = all_parts_on_remote_disks && global_ctx->data->getSettings()->vertical_merge_remote_filesystem_prefetch;
if (ctx->use_prefetch)
if (ctx->use_prefetch && ctx->it_name_and_type != global_ctx->gathering_columns.end())
ctx->prepared_pipe = createPipeForReadingOneColumn(ctx->it_name_and_type->name);
return false;