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18 lines
351 B
C++
18 lines
351 B
C++
#pragma once
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#include <base/types.h>
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namespace DB
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{
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/// Algorithm of Merge.
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enum class MergeAlgorithm
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{
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Undecided, /// Not running yet
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Horizontal, /// per-row merge of all columns
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Vertical /// per-row merge of PK and secondary indices columns, per-column gather for non-PK columns
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};
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String toString(MergeAlgorithm merge_algorithm);
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}
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