Commit missed files

dbms/src/Storages/MergeTree/MergeTreeIndexGranularity.cpp

@@ -0,0 +1,120 @@
+#include <Storages/MergeTree/MergeTreeIndexGranularity.h>
+#include <Common/Exception.h>
+#include <IO/WriteHelpers.h>
+
+
+namespace DB
+{
+namespace ErrorCodes
+{
+    extern const int LOGICAL_ERROR;
+}
+
+MergeTreeIndexGranularity::MergeTreeIndexGranularity(const std::vector<size_t> & marks_rows_partial_sums_)
+    : marks_rows_partial_sums(marks_rows_partial_sums_)
+{
+}
+
+
+MergeTreeIndexGranularity::MergeTreeIndexGranularity(size_t marks_count, size_t fixed_granularity)
+    : marks_rows_partial_sums(marks_count, fixed_granularity)
+{
+}
+
+size_t MergeTreeIndexGranularity::getAvgGranularity() const
+{
+    if (marks_rows_partial_sums.empty())
+        throw Exception("Trying to compute average index granularity with zero marks", ErrorCodes::LOGICAL_ERROR);
+
+    return marks_rows_partial_sums.back() / marks_rows_partial_sums.size();
+}
+
+
+size_t MergeTreeIndexGranularity::getMarkStartingRow(size_t mark_index) const
+{
+    if (mark_index == 0)
+        return 0;
+    return marks_rows_partial_sums[mark_index - 1];
+}
+
+size_t MergeTreeIndexGranularity::getMarksCount() const
+{
+    return marks_rows_partial_sums.size();
+}
+
+size_t MergeTreeIndexGranularity::getTotalRows() const
+{
+    if (marks_rows_partial_sums.empty())
+        return 0;
+    return marks_rows_partial_sums.back();
+}
+
+void MergeTreeIndexGranularity::appendMark(size_t rows_count)
+{
+    if (marks_rows_partial_sums.empty())
+        marks_rows_partial_sums.push_back(rows_count);
+    else
+        marks_rows_partial_sums.push_back(marks_rows_partial_sums.back() + rows_count);
+}
+
+
+size_t MergeTreeIndexGranularity::getMarkPositionInRows(const size_t mark_index) const
+{
+    if (mark_index == 0)
+        return 0;
+    return marks_rows_partial_sums[mark_index - 1];
+}
+
+
+size_t MergeTreeIndexGranularity::getRowsCountInRange(size_t begin, size_t end) const
+{
+    size_t subtrahend = 0;
+    if (begin != 0)
+        subtrahend = marks_rows_partial_sums[begin - 1];
+    return marks_rows_partial_sums[end - 1] - subtrahend;
+}
+
+size_t MergeTreeIndexGranularity::getRowsCountInRange(const MarkRange & range) const
+{
+    return getRowsCountInRange(range.begin, range.end);
+}
+
+size_t MergeTreeIndexGranularity::getRowsCountInRanges(const MarkRanges & ranges) const
+{
+    size_t total = 0;
+    for (const auto & range : ranges)
+        total += getRowsCountInRange(range);
+
+    return total;
+}
+
+
+size_t MergeTreeIndexGranularity::countMarksForRows(size_t from_mark, size_t number_of_rows, size_t offset_in_rows) const
+{
+    size_t rows_before_mark = getMarkStartingRow(from_mark);
+    size_t last_row_pos = rows_before_mark + offset_in_rows + number_of_rows;
+    auto position = std::upper_bound(marks_rows_partial_sums.begin(), marks_rows_partial_sums.end(), last_row_pos);
+    size_t to_mark;
+    if (position == marks_rows_partial_sums.end())
+        to_mark = marks_rows_partial_sums.size();
+    else
+        to_mark = position - marks_rows_partial_sums.begin();
+
+    return getRowsCountInRange(from_mark, std::max(1UL, to_mark)) - offset_in_rows;
+
+}
+
+void MergeTreeIndexGranularity::resizeWithFixedGranularity(size_t size, size_t fixed_granularity)
+{
+    marks_rows_partial_sums.resize(size);
+
+    size_t prev = 0;
+    for (size_t i = 0; i < size; ++i)
+    {
+        marks_rows_partial_sums[i] = fixed_granularity + prev;
+        prev = marks_rows_partial_sums[i];
+    }
+}
+
+
+}

dbms/src/Storages/MergeTree/MergeTreeIndexGranularity.h

@@ -0,0 +1,64 @@
+#pragma once
+#include <vector>
+#include <Storages/MergeTree/MarkRange.h>
+
+namespace DB
+{
+
+class MergeTreeIndexGranularity
+{
+private:
+    std::vector<size_t> marks_rows_partial_sums;
+    bool initialized = false;
+
+public:
+    MergeTreeIndexGranularity() = default;
+    explicit MergeTreeIndexGranularity(const std::vector<size_t> & marks_rows_partial_sums_);
+    MergeTreeIndexGranularity(size_t marks_count, size_t fixed_granularity);
+
+
+    size_t getRowsCountInRange(const MarkRange & range) const;
+    size_t getRowsCountInRange(size_t begin, size_t end) const;
+    size_t getRowsCountInRanges(const MarkRanges & ranges) const;
+    size_t getMarkPositionInRows(const size_t mark_index) const;
+
+    size_t countMarksForRows(size_t from_mark, size_t number_of_rows, size_t offset_in_rows=0) const;
+
+    size_t getAvgGranularity() const;
+    size_t getMarksCount() const;
+    size_t getTotalRows() const;
+
+    inline size_t getMarkRows(size_t mark_index) const
+    {
+        if (mark_index == 0)
+            return marks_rows_partial_sums[0];
+        else
+            return marks_rows_partial_sums[mark_index] - marks_rows_partial_sums[mark_index - 1];
+    }
+
+    size_t getMarkStartingRow(size_t mark_index) const;
+
+    size_t getLastMarkRows() const
+    {
+        size_t last = marks_rows_partial_sums.size() - 1;
+        return getMarkRows(last);
+    }
+
+    bool empty() const
+    {
+        return marks_rows_partial_sums.empty();
+    }
+    bool isInitialized() const
+    {
+        return initialized;
+    }
+
+    void setInitialized()
+    {
+        initialized = true;
+    }
+    void appendMark(size_t rows_count);
+    void resizeWithFixedGranularity(size_t size, size_t fixed_granularity);
+};
+
+}