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Add brief comment for MergeTreeSequentialSource

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Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>
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Azat Khuzhin 2023-12-14 18:01:11 +01:00
parent 325ccacc45
commit e71f6893cc
1 changed files with 3 additions and 1 deletions
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4
src/Storages/MergeTree/MergeTreeSequentialSource.cpp
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@ -20,7 +20,9 @@ namespace ErrorCodes
}
/// Lightweight (in terms of logic) stream for reading single part from MergeTree
/// Lightweight (in terms of logic) stream for reading single part from
/// MergeTree, used for merges and mutations.
///
/// NOTE:
/// It doesn't filter out rows that are deleted with lightweight deletes.
/// Use createMergeTreeSequentialSource filter out those rows.