1#include <Storages/MergeTree/MergeTreeIndexGranularity.h>
2#include <Common/Exception.h>
3#include <IO/WriteHelpers.h>
4
5
6namespace DB
7{
8namespace ErrorCodes
9{
10 extern const int LOGICAL_ERROR;
11}
12
13MergeTreeIndexGranularity::MergeTreeIndexGranularity(const std::vector<size_t> & marks_rows_partial_sums_)
14 : marks_rows_partial_sums(marks_rows_partial_sums_)
15{
16}
17
18
19MergeTreeIndexGranularity::MergeTreeIndexGranularity(size_t marks_count, size_t fixed_granularity)
20 : marks_rows_partial_sums(marks_count, fixed_granularity)
21{
22}
23
24size_t MergeTreeIndexGranularity::getMarkStartingRow(size_t mark_index) const
25{
26 if (mark_index == 0)
27 return 0;
28 return marks_rows_partial_sums[mark_index - 1];
29}
30
31size_t MergeTreeIndexGranularity::getMarksCount() const
32{
33 return marks_rows_partial_sums.size();
34}
35
36size_t MergeTreeIndexGranularity::getTotalRows() const
37{
38 if (marks_rows_partial_sums.empty())
39 return 0;
40 return marks_rows_partial_sums.back();
41}
42
43void MergeTreeIndexGranularity::appendMark(size_t rows_count)
44{
45 if (marks_rows_partial_sums.empty())
46 marks_rows_partial_sums.push_back(rows_count);
47 else
48 marks_rows_partial_sums.push_back(marks_rows_partial_sums.back() + rows_count);
49}
50
51size_t MergeTreeIndexGranularity::getRowsCountInRange(size_t begin, size_t end) const
52{
53 size_t subtrahend = 0;
54 if (begin != 0)
55 subtrahend = marks_rows_partial_sums[begin - 1];
56 return marks_rows_partial_sums[end - 1] - subtrahend;
57}
58
59size_t MergeTreeIndexGranularity::getRowsCountInRange(const MarkRange & range) const
60{
61 return getRowsCountInRange(range.begin, range.end);
62}
63
64size_t MergeTreeIndexGranularity::getRowsCountInRanges(const MarkRanges & ranges) const
65{
66 size_t total = 0;
67 for (const auto & range : ranges)
68 total += getRowsCountInRange(range);
69
70 return total;
71}
72
73
74size_t MergeTreeIndexGranularity::countMarksForRows(size_t from_mark, size_t number_of_rows, size_t offset_in_rows) const
75{
76 size_t rows_before_mark = getMarkStartingRow(from_mark);
77 size_t last_row_pos = rows_before_mark + offset_in_rows + number_of_rows;
78 auto position = std::upper_bound(marks_rows_partial_sums.begin(), marks_rows_partial_sums.end(), last_row_pos);
79 size_t to_mark;
80 if (position == marks_rows_partial_sums.end())
81 to_mark = marks_rows_partial_sums.size();
82 else
83 to_mark = position - marks_rows_partial_sums.begin();
84
85 return getRowsCountInRange(from_mark, std::max(1UL, to_mark)) - offset_in_rows;
86
87}
88
89void MergeTreeIndexGranularity::resizeWithFixedGranularity(size_t size, size_t fixed_granularity)
90{
91 marks_rows_partial_sums.resize(size);
92
93 size_t prev = 0;
94 for (size_t i = 0; i < size; ++i)
95 {
96 marks_rows_partial_sums[i] = fixed_granularity + prev;
97 prev = marks_rows_partial_sums[i];
98 }
99}
100
101
102}
103