Écrire des requêtes dans ClickHouse à l’aide des données GitHub

git clone git@github.com:ClickHouse/ClickHouse.git
cd ClickHouse
clickhouse git-import --skip-paths 'generated\.cpp|^(contrib|docs?|website|libs/(libcityhash|liblz4|libdivide|libvectorclass|libdouble-conversion|libcpuid|libzstd|libfarmhash|libmetrohash|libpoco|libwidechar_width))/' --skip-commits-with-messages '^Merge branch '

clickhouse git-import -h

CREATE TABLE git.commits
(
    hash String,
    author LowCardinality(String),
    time DateTime,
    message String,
    files_added UInt32,
    files_deleted UInt32,
    files_renamed UInt32,
    files_modified UInt32,
    lines_added UInt32,
    lines_deleted UInt32,
    hunks_added UInt32,
    hunks_removed UInt32,
    hunks_changed UInt32
) ENGINE = MergeTree ORDER BY time;

DROP DATABASE IF EXISTS git;
CREATE DATABASE git;

CREATE TABLE git.commits
(
    hash String,
    author LowCardinality(String),
    time DateTime,
    message String,
    files_added UInt32,
    files_deleted UInt32,
    files_renamed UInt32,
    files_modified UInt32,
    lines_added UInt32,
    lines_deleted UInt32,
    hunks_added UInt32,
    hunks_removed UInt32,
    hunks_changed UInt32
) ENGINE = MergeTree ORDER BY time;

CREATE TABLE git.file_changes
(
    change_type Enum('Add' = 1, 'Delete' = 2, 'Modify' = 3, 'Rename' = 4, 'Copy' = 5, 'Type' = 6),
    path LowCardinality(String),
    old_path LowCardinality(String),
    file_extension LowCardinality(String),
    lines_added UInt32,
    lines_deleted UInt32,
    hunks_added UInt32,
    hunks_removed UInt32,
    hunks_changed UInt32,

    commit_hash String,
    author LowCardinality(String),
    time DateTime,
    commit_message String,
    commit_files_added UInt32,
    commit_files_deleted UInt32,
    commit_files_renamed UInt32,
    commit_files_modified UInt32,
    commit_lines_added UInt32,
    commit_lines_deleted UInt32,
    commit_hunks_added UInt32,
    commit_hunks_removed UInt32,
    commit_hunks_changed UInt32
) ENGINE = MergeTree ORDER BY time;

CREATE TABLE git.line_changes
(
    sign Int8,
    line_number_old UInt32,
    line_number_new UInt32,
    hunk_num UInt32,
    hunk_start_line_number_old UInt32,
    hunk_start_line_number_new UInt32,
    hunk_lines_added UInt32,
    hunk_lines_deleted UInt32,
    hunk_context LowCardinality(String),
    line LowCardinality(String),
    indent UInt8,
    line_type Enum('Empty' = 0, 'Comment' = 1, 'Punct' = 2, 'Code' = 3),

    prev_commit_hash String,
    prev_author LowCardinality(String),
    prev_time DateTime,

    file_change_type Enum('Add' = 1, 'Delete' = 2, 'Modify' = 3, 'Rename' = 4, 'Copy' = 5, 'Type' = 6),
    path LowCardinality(String),
    old_path LowCardinality(String),
    file_extension LowCardinality(String),
    file_lines_added UInt32,
    file_lines_deleted UInt32,
    file_hunks_added UInt32,
    file_hunks_removed UInt32,
    file_hunks_changed UInt32,

    commit_hash String,
    author LowCardinality(String),
    time DateTime,
    commit_message String,
    commit_files_added UInt32,
    commit_files_deleted UInt32,
    commit_files_renamed UInt32,
    commit_files_modified UInt32,
    commit_lines_added UInt32,
    commit_lines_deleted UInt32,
    commit_hunks_added UInt32,
    commit_hunks_removed UInt32,
    commit_hunks_changed UInt32
) ENGINE = MergeTree ORDER BY time;

INSERT INTO git.commits SELECT *
FROM s3('https://datasets-documentation.s3.amazonaws.com/github/commits/clickhouse/commits.tsv.xz', 'TSV', 'hash String,author LowCardinality(String), time DateTime, message String, files_added UInt32, files_deleted UInt32, files_renamed UInt32, files_modified UInt32, lines_added UInt32, lines_deleted UInt32, hunks_added UInt32, hunks_removed UInt32, hunks_changed UInt32')

0 rows in set. Elapsed: 1.826 sec. Processed 62.78 thousand rows, 8.50 MB (34.39 thousand rows/s., 4.66 MB/s.)

INSERT INTO git.file_changes SELECT *
FROM s3('https://datasets-documentation.s3.amazonaws.com/github/commits/clickhouse/file_changes.tsv.xz', 'TSV', 'change_type Enum(\'Add\' = 1, \'Delete\' = 2, \'Modify\' = 3, \'Rename\' = 4, \'Copy\' = 5, \'Type\' = 6), path LowCardinality(String), old_path LowCardinality(String), file_extension LowCardinality(String), lines_added UInt32, lines_deleted UInt32, hunks_added UInt32, hunks_removed UInt32, hunks_changed UInt32, commit_hash String, author LowCardinality(String), time DateTime, commit_message String, commit_files_added UInt32, commit_files_deleted UInt32, commit_files_renamed UInt32, commit_files_modified UInt32, commit_lines_added UInt32, commit_lines_deleted UInt32, commit_hunks_added UInt32, commit_hunks_removed UInt32, commit_hunks_changed UInt32')

0 rows in set. Elapsed: 2.688 sec. Processed 266.05 thousand rows, 48.30 MB (98.97 thousand rows/s., 17.97 MB/s.)

INSERT INTO git.line_changes SELECT *
FROM s3('https://datasets-documentation.s3.amazonaws.com/github/commits/clickhouse/line_changes.tsv.xz', 'TSV', '    sign Int8, line_number_old UInt32, line_number_new UInt32, hunk_num UInt32, hunk_start_line_number_old UInt32, hunk_start_line_number_new UInt32, hunk_lines_added UInt32,\n    hunk_lines_deleted UInt32, hunk_context LowCardinality(String), line LowCardinality(String), indent UInt8, line_type Enum(\'Empty\' = 0, \'Comment\' = 1, \'Punct\' = 2, \'Code\' = 3), prev_commit_hash String, prev_author LowCardinality(String), prev_time DateTime, file_change_type Enum(\'Add\' = 1, \'Delete\' = 2, \'Modify\' = 3, \'Rename\' = 4, \'Copy\' = 5, \'Type\' = 6),\n    path LowCardinality(String), old_path LowCardinality(String), file_extension LowCardinality(String), file_lines_added UInt32, file_lines_deleted UInt32, file_hunks_added UInt32, file_hunks_removed UInt32, file_hunks_changed UInt32, commit_hash String,\n    author LowCardinality(String), time DateTime, commit_message String, commit_files_added UInt32, commit_files_deleted UInt32, commit_files_renamed UInt32, commit_files_modified UInt32, commit_lines_added UInt32, commit_lines_deleted UInt32, commit_hunks_added UInt32, commit_hunks_removed UInt32, commit_hunks_changed UInt32')

0 rows in set. Elapsed: 50.535 sec. Processed 7.54 million rows, 2.09 GB (149.11 thousand rows/s., 41.40 MB/s.)

SELECT
    time,
    substring(commit_hash, 1, 11) AS commit,
    change_type,
    author,
    path,
    old_path,
    lines_added,
    lines_deleted,
    commit_message
FROM git.file_changes
WHERE path = 'src/Storages/StorageReplicatedMergeTree.cpp'
ORDER BY time DESC
LIMIT 10

┌────────────────time─┬─commit──────┬─change_type─┬─author─────────────┬─path────────────────────────────────────────┬─old_path─┬─lines_added─┬─lines_deleted─┬─commit_message───────────────────────────────────┐
│ 2022-10-30 16:30:51 │ c68ab231f91 │ Modify      │ Alexander Tokmakov │ src/Storages/StorageReplicatedMergeTree.cpp │          │          13 │            10 │ fix accessing part in Deleting state             │
│ 2022-10-23 16:24:20 │ b40d9200d20 │ Modify      │ Anton Popov        │ src/Storages/StorageReplicatedMergeTree.cpp │          │          28 │            30 │ better semantic of constsness of DataPartStorage │
│ 2022-10-23 01:23:15 │ 56e5daba0c9 │ Modify      │ Anton Popov        │ src/Storages/StorageReplicatedMergeTree.cpp │          │          28 │            44 │ remove DataPartStorageBuilder                    │
│ 2022-10-21 13:35:37 │ 851f556d65a │ Modify      │ Igor Nikonov       │ src/Storages/StorageReplicatedMergeTree.cpp │          │           3 │             2 │ Remove unused parameter                          │
│ 2022-10-21 13:02:52 │ 13d31eefbc3 │ Modify      │ Igor Nikonov       │ src/Storages/StorageReplicatedMergeTree.cpp │          │           4 │             4 │ Replicated merge tree polishing                  │
│ 2022-10-21 12:25:19 │ 4e76629aafc │ Modify      │ Azat Khuzhin       │ src/Storages/StorageReplicatedMergeTree.cpp │          │           3 │             2 │ Fixes for -Wshorten-64-to-32                     │
│ 2022-10-19 13:59:28 │ 05e6b94b541 │ Modify      │ Antonio Andelic    │ src/Storages/StorageReplicatedMergeTree.cpp │          │           4 │             0 │ Polishing                                        │
│ 2022-10-19 13:34:20 │ e5408aac991 │ Modify      │ Antonio Andelic    │ src/Storages/StorageReplicatedMergeTree.cpp │          │           3 │            53 │ Simplify logic                                   │
│ 2022-10-18 15:36:11 │ 7befe2825c9 │ Modify      │ Alexey Milovidov   │ src/Storages/StorageReplicatedMergeTree.cpp │          │           2 │             2 │ Update StorageReplicatedMergeTree.cpp            │
│ 2022-10-18 15:35:44 │ 0623ad4e374 │ Modify      │ Alexey Milovidov   │ src/Storages/StorageReplicatedMergeTree.cpp │          │           1 │             1 │ Update StorageReplicatedMergeTree.cpp            │
└─────────────────────┴─────────────┴─────────────┴────────────────────┴─────────────────────────────────────────────┴──────────┴─────────────┴───────────────┴──────────────────────────────────────────────────┘

10 rows in set. Elapsed: 0.006 sec. Processed 12.10 thousand rows, 1.60 MB (1.93 million rows/s., 255.40 MB/s.)

SELECT
    time,
    substring(commit_hash, 1, 11) AS commit,
    sign,
    line_number_old,
    line_number_new,
    author,
    line
FROM git.line_changes
WHERE path = 'src/Storages/StorageReplicatedMergeTree.cpp'
ORDER BY line_number_new ASC
LIMIT 10

┌────────────────time─┬─commit──────┬─sign─┬─line_number_old─┬─line_number_new─┬─author───────────┬─line──────────────────────────────────────────────────┐
│ 2020-04-16 02:06:10 │ cdeda4ab915 │   -1 │               1 │               1 │ Alexey Milovidov │ #include <Disks/DiskSpaceMonitor.h>                   │
│ 2020-04-16 02:06:10 │ cdeda4ab915 │    1 │               2 │               1 │ Alexey Milovidov │ #include <Core/Defines.h>                             │
│ 2020-04-16 02:06:10 │ cdeda4ab915 │    1 │               2 │               2 │ Alexey Milovidov │                                                       │
│ 2021-05-03 23:46:51 │ 02ce9cc7254 │   -1 │               3 │               2 │ Alexey Milovidov │ #include <Common/FieldVisitors.h>                     │
│ 2021-05-27 22:21:02 │ e2f29b9df02 │   -1 │               3 │               2 │ s-kat            │ #include <Common/FieldVisitors.h>                     │
│ 2022-10-03 22:30:50 │ 210882b9c4d │    1 │               2 │               3 │ alesapin         │ #include <ranges>                                     │
│ 2022-10-23 16:24:20 │ b40d9200d20 │    1 │               2 │               3 │ Anton Popov      │ #include <cstddef>                                    │
│ 2021-06-20 09:24:43 │ 4c391f8e994 │    1 │               2 │               3 │ Mike Kot         │ #include "Common/hex.h"                               │
│ 2021-12-29 09:18:56 │ 8112a712336 │   -1 │               6 │               5 │ avogar           │ #include <Common/ThreadPool.h>                        │
│ 2022-04-21 20:19:13 │ 9133e398b8c │    1 │              11 │              12 │ Nikolai Kochetov │ #include <Storages/MergeTree/DataPartStorageOnDisk.h> │
└─────────────────────┴─────────────┴──────┴─────────────────┴─────────────────┴──────────────────┴───────────────────────────────────────────────────────┘

10 rows in set. Elapsed: 0.258 sec. Processed 7.54 million rows, 654.92 MB (29.24 million rows/s., 2.54 GB/s.)

SELECT path
FROM
(
    SELECT
        old_path AS path,
        max(time) AS last_time,
        2 AS change_type
    FROM git.file_changes
    GROUP BY old_path
    UNION ALL
    SELECT
        path,
        max(time) AS last_time,
        argMax(change_type, time) AS change_type
    FROM git.file_changes
    GROUP BY path
)
GROUP BY path
HAVING (argMax(change_type, last_time) != 2) AND NOT match(path, '(^dbms/)|(^libs/)|(^tests/testflows/)|(^programs/server/store/)') ORDER BY path
LIMIT 10

┌─path────────────────────────────────────────────────────────────┐
│ tests/queries/0_stateless/01054_random_printable_ascii_ubsan.sh │
│ tests/queries/0_stateless/02247_read_bools_as_numbers_json.sh   │
│ tests/performance/file_table_function.xml                       │
│ tests/queries/0_stateless/01902_self_aliases_in_columns.sql     │
│ tests/queries/0_stateless/01070_h3_get_base_cell.reference      │
│ src/Functions/ztest.cpp                                         │
│ src/Interpreters/InterpreterShowTablesQuery.h                   │
│ src/Parsers/Kusto/ParserKQLStatement.h                          │
│ tests/queries/0_stateless/00938_dataset_test.sql                │
│ src/Dictionaries/Embedded/GeodataProviders/Types.h              │
└─────────────────────────────────────────────────────────────────┘

10 rows in set. Elapsed: 0.085 sec. Processed 532.10 thousand rows, 8.68 MB (6.30 million rows/s., 102.64 MB/s.)

SELECT uniq(path)
FROM
(
    SELECT path
    FROM
    (
        SELECT
            old_path AS path,
            max(time) AS last_time,
            2 AS change_type
        FROM git.file_changes
        GROUP BY old_path
        UNION ALL
        SELECT
            path,
            max(time) AS last_time,
            argMax(change_type, time) AS change_type
        FROM git.file_changes
        GROUP BY path
    )
    GROUP BY path
    HAVING (argMax(change_type, last_time) != 2) AND NOT match(path, '(^dbms/)|(^libs/)|(^tests/testflows/)|(^programs/server/store/)') ORDER BY path
)

┌─uniq(path)─┐
│      18559 │
└────────────┘
1 row in set. Elapsed: 0.089 sec. Processed 532.10 thousand rows, 8.68 MB (6.01 million rows/s., 97.99 MB/s.)

git ls-files | grep -v -E 'generated\.cpp|^(contrib|docs?|website|libs/(libcityhash|liblz4|libdivide|libvectorclass|libdouble-conversion|libcpuid|libzstd|libfarmhash|libmetrohash|libpoco|libwidechar_width))/' | wc -l
   18155

  SELECT
      change_type,
      path,
      old_path,
      time,
      commit_hash
  FROM git.file_changes
  WHERE (path = 'src/Functions/geometryFromColumn.h') OR (old_path = 'src/Functions/geometryFromColumn.h')

  ┌─change_type─┬─path───────────────────────────────┬─old_path───────────────────────────┬────────────────time─┬─commit_hash──────────────────────────────┐
  │ Add         │ src/Functions/geometryFromColumn.h │                                    │ 2021-03-11 12:08:16 │ 9376b676e9a9bb8911b872e1887da85a45f7479d │
  │ Modify      │ src/Functions/geometryFromColumn.h │                                    │ 2021-03-11 12:08:16 │ 6d59be5ea4768034f6526f7f9813062e0c369f7b │
  │ Modify      │ src/Functions/geometryFromColumn.h │                                    │ 2021-03-11 12:08:16 │ 33acc2aa5dc091a7cb948f78c558529789b2bad8 │
  │ Modify      │ src/Functions/geometryFromColumn.h │                                    │ 2021-03-11 12:08:16 │ 78e0db268ceadc42f82bc63a77ee1a4da6002463 │
  │ Modify      │ src/Functions/geometryFromColumn.h │                                    │ 2021-03-11 12:08:16 │ 14a891057d292a164c4179bfddaef45a74eaf83a │
  │ Modify      │ src/Functions/geometryFromColumn.h │                                    │ 2021-03-11 12:08:16 │ d0d6e6953c2a2af9fb2300921ff96b9362f22edb │
  │ Modify      │ src/Functions/geometryFromColumn.h │                                    │ 2021-03-11 12:08:16 │ fe8382521139a58c0ba277eb848e88894658db66 │
  │ Modify      │ src/Functions/geometryFromColumn.h │                                    │ 2021-03-11 12:08:16 │ 3be3d5cde8788165bc0558f1e2a22568311c3103 │
  │ Modify      │ src/Functions/geometryFromColumn.h │                                    │ 2021-03-11 12:08:16 │ afad9bf4d0a55ed52a3f55483bc0973456e10a56 │
  │ Modify      │ src/Functions/geometryFromColumn.h │                                    │ 2021-03-11 12:08:16 │ e3290ecc78ca3ea82b49ebcda22b5d3a4df154e6 │
  │ Rename      │ src/Functions/geometryConverters.h │ src/Functions/geometryFromColumn.h │ 2021-03-11 12:08:16 │ 125945769586baf6ffd15919b29565b1b2a63218 │
  └─────────────┴────────────────────────────────────┴────────────────────────────────────┴─────────────────────┴──────────────────────────────────────────┘
  11 rows in set. Elapsed: 0.030 sec. Processed 266.05 thousand rows, 6.61 MB (8.89 million rows/s., 220.82 MB/s.)

WITH current_files AS
    (
        SELECT path
        FROM
        (
            SELECT
                old_path AS path,
                max(time) AS last_time,
                2 AS change_type
            FROM git.file_changes
            GROUP BY old_path
            UNION ALL
            SELECT
                path,
                max(time) AS last_time,
                argMax(change_type, time) AS change_type
            FROM git.file_changes
            GROUP BY path
        )
        GROUP BY path
        HAVING (argMax(change_type, last_time) != 2) AND (NOT match(path, '(^dbms/)|(^libs/)|(^tests/testflows/)|(^programs/server/store/)'))
        ORDER BY path ASC
    )
SELECT
    path,
    sum(lines_added) + sum(lines_deleted) AS modifications
FROM git.file_changes
WHERE (path IN (current_files)) AND (file_extension IN ('h', 'cpp', 'sql'))
GROUP BY path
ORDER BY modifications DESC
LIMIT 10

┌─path───────────────────────────────────────────────────┬─modifications─┐
│ src/Storages/StorageReplicatedMergeTree.cpp            │         21871 │
│ src/Storages/MergeTree/MergeTreeData.cpp               │         17709 │
│ programs/client/Client.cpp                             │         15882 │
│ src/Storages/MergeTree/MergeTreeDataSelectExecutor.cpp │         14249 │
│ src/Interpreters/InterpreterSelectQuery.cpp            │         12636 │
│ src/Parsers/ExpressionListParsers.cpp                  │         11794 │
│ src/Analyzer/QueryAnalysisPass.cpp                     │         11760 │
│ src/Coordination/KeeperStorage.cpp                     │         10225 │
│ src/Functions/FunctionsConversion.h                    │          9247 │
│ src/Parsers/ExpressionElementParsers.cpp               │          8197 │
└────────────────────────────────────────────────────────┴───────────────┘

10 rows in set. Elapsed: 0.134 sec. Processed 798.15 thousand rows, 16.46 MB (5.95 million rows/s., 122.62 MB/s.)

SELECT
    day_of_week,
    count() AS c
FROM git.commits
GROUP BY dayOfWeek(time) AS day_of_week

┌─day_of_week─┬─────c─┐
│           1 │ 10575 │
│           2 │ 10645 │
│           3 │ 10748 │
│           4 │ 10944 │
│           5 │ 10090 │
│           6 │  4617 │
│           7 │  5166 │
└─────────────┴───────┘
7 rows in set. Elapsed: 0.262 sec. Processed 62.78 thousand rows, 251.14 KB (239.73 thousand rows/s., 958.93 KB/s.)

SELECT
    week,
    sum(lines_added) AS lines_added,
    sum(lines_deleted) AS lines_deleted,
    uniq(commit_hash) AS num_commits,
    uniq(author) AS authors
FROM git.file_changes
WHERE path LIKE 'src/Storages%'
GROUP BY toStartOfWeek(time) AS week
ORDER BY week ASC
LIMIT 10

┌───────week─┬─lines_added─┬─lines_deleted─┬─num_commits─┬─authors─┐
│ 2020-03-29 │          49 │            35 │           4 │       3 │
│ 2020-04-05 │         940 │           601 │          55 │      14 │
│ 2020-04-12 │        1472 │           607 │          32 │      11 │
│ 2020-04-19 │         917 │           841 │          39 │      12 │
│ 2020-04-26 │        1067 │           626 │          36 │      10 │
│ 2020-05-03 │         514 │           435 │          27 │      10 │
│ 2020-05-10 │        2552 │           537 │          48 │      12 │
│ 2020-05-17 │        3585 │          1913 │          83 │       9 │
│ 2020-05-24 │        2851 │          1812 │          74 │      18 │
│ 2020-05-31 │        2771 │          2077 │          77 │      16 │
└────────────┴─────────────┴───────────────┴─────────────┴─────────┘
10 rows in set. Elapsed: 0.043 sec. Processed 266.05 thousand rows, 15.85 MB (6.12 million rows/s., 364.61 MB/s.)

WITH current_files AS
    (
        SELECT path
        FROM
        (
            SELECT
                old_path AS path,
                max(time) AS last_time,
                2 AS change_type
            FROM git.file_changes
            GROUP BY old_path
            UNION ALL
            SELECT
                path,
                max(time) AS last_time,
                argMax(change_type, time) AS change_type
            FROM git.file_changes
            GROUP BY path
        )
        GROUP BY path
        HAVING (argMax(change_type, last_time) != 2) AND (NOT match(path, '(^dbms/)|(^libs/)|(^tests/testflows/)|(^programs/server/store/)'))
        ORDER BY path ASC
    )
SELECT
    path,
    uniq(author) AS num_authors
FROM git.file_changes
WHERE path IN (current_files)
GROUP BY path
ORDER BY num_authors DESC
LIMIT 10

┌─path────────────────────────────────────────┬─num_authors─┐
│ src/Core/Settings.h                         │         127 │
│ CMakeLists.txt                              │          96 │
│ .gitmodules                                 │          85 │
│ src/Storages/MergeTree/MergeTreeData.cpp    │          72 │
│ src/CMakeLists.txt                          │          71 │
│ programs/server/Server.cpp                  │          70 │
│ src/Interpreters/Context.cpp                │          64 │
│ src/Storages/StorageReplicatedMergeTree.cpp │          63 │
│ src/Common/ErrorCodes.cpp                   │          61 │
│ src/Interpreters/InterpreterSelectQuery.cpp │          59 │
└─────────────────────────────────────────────┴─────────────┘

10 rows in set. Elapsed: 0.239 sec. Processed 798.15 thousand rows, 14.13 MB (3.35 million rows/s., 59.22 MB/s.)

WITH current_files AS
    (
        SELECT path
        FROM
        (
            SELECT
                old_path AS path,
                max(time) AS last_time,
                2 AS change_type
            FROM git.file_changes
            GROUP BY old_path
            UNION ALL
            SELECT
                path,
                max(time) AS last_time,
                argMax(change_type, time) AS change_type
            FROM git.file_changes
            GROUP BY path
        )
        GROUP BY path
        HAVING (argMax(change_type, last_time) != 2) AND (NOT match(path, '(^dbms/)|(^libs/)|(^tests/testflows/)|(^programs/server/store/)'))
        ORDER BY path ASC
    )
SELECT
    any(path) AS file_path,
    line,
    max(time) AS latest_change,
    any(file_change_type)
FROM git.line_changes
WHERE path IN (current_files)
GROUP BY line
ORDER BY latest_change ASC
LIMIT 10

┌─file_path───────────────────────────────────┬─line────────────────────────────────────────────────────────┬───────latest_change─┬─any(file_change_type)─┐
│ utils/compressor/test.sh                    │ ./compressor -d < compressor.snp > compressor2              │ 2011-06-17 22:19:39 │ Modify                │
│ utils/compressor/test.sh                    │ ./compressor < compressor > compressor.snp                  │ 2011-06-17 22:19:39 │ Modify                │
│ utils/compressor/test.sh                    │ ./compressor -d < compressor.qlz > compressor2              │ 2014-02-24 03:14:30 │ Add                   │
│ utils/compressor/test.sh                    │ ./compressor < compressor > compressor.qlz                  │ 2014-02-24 03:14:30 │ Add                   │
│ utils/config-processor/config-processor.cpp │ if (argc != 2)                                              │ 2014-02-26 19:10:00 │ Add                   │
│ utils/config-processor/config-processor.cpp │ std::cerr << "std::exception: " << e.what() << std::endl;   │ 2014-02-26 19:10:00 │ Add                   │
│ utils/config-processor/config-processor.cpp │ std::cerr << "Exception: " << e.displayText() << std::endl; │ 2014-02-26 19:10:00 │ Add                   │
│ utils/config-processor/config-processor.cpp │ Poco::XML::DOMWriter().writeNode(std::cout, document);      │ 2014-02-26 19:10:00 │ Add                   │
│ utils/config-processor/config-processor.cpp │ std::cerr << "Some exception" << std::endl;                 │ 2014-02-26 19:10:00 │ Add                   │
│ utils/config-processor/config-processor.cpp │ std::cerr << "usage: " << argv[0] << " path" << std::endl;  │ 2014-02-26 19:10:00 │ Add                   │
└─────────────────────────────────────────────┴─────────────────────────────────────────────────────────────┴─────────────────────┴───────────────────────┘

10 rows in set. Elapsed: 1.101 sec. Processed 8.07 million rows, 905.86 MB (7.33 million rows/s., 823.13 MB/s.)

WITH current_files AS
    (
        SELECT path
        FROM
        (
            SELECT
                old_path AS path,
                max(time) AS last_time,
                2 AS change_type
            FROM git.file_changes
            GROUP BY old_path
            UNION ALL
            SELECT
                path,
                max(time) AS last_time,
                argMax(change_type, time) AS change_type
            FROM git.file_changes
            GROUP BY path
        )
        GROUP BY path
        HAVING (argMax(change_type, last_time) != 2) AND (NOT match(path, '(^dbms/)|(^libs/)|(^tests/testflows/)|(^programs/server/store/)'))
        ORDER BY path ASC
    )
SELECT
    count() AS c,
    path,
    max(time) AS latest_change
FROM git.file_changes
WHERE path IN (current_files)
GROUP BY path
ORDER BY c DESC
LIMIT 10

┌───c─┬─path────────────────────────────────────────┬───────latest_change─┐
│ 790 │ src/Storages/StorageReplicatedMergeTree.cpp │ 2022-10-30 16:30:51 │
│ 788 │ src/Storages/MergeTree/MergeTreeData.cpp    │ 2022-11-04 09:26:44 │
│ 752 │ src/Core/Settings.h                         │ 2022-10-25 11:35:25 │
│ 749 │ CMakeLists.txt                              │ 2022-10-05 21:00:49 │
│ 575 │ src/Interpreters/InterpreterSelectQuery.cpp │ 2022-11-01 10:20:10 │
│ 563 │ CHANGELOG.md                                │ 2022-10-27 08:19:50 │
│ 491 │ src/Interpreters/Context.cpp                │ 2022-10-25 12:26:29 │
│ 437 │ programs/server/Server.cpp                  │ 2022-10-21 12:25:19 │
│ 375 │ programs/client/Client.cpp                  │ 2022-11-03 03:16:55 │
│ 350 │ src/CMakeLists.txt                          │ 2022-10-24 09:22:37 │
└─────┴─────────────────────────────────────────────┴─────────────────────┘

10 rows in set. Elapsed: 0.124 sec. Processed 798.15 thousand rows, 14.71 MB (6.44 million rows/s., 118.61 MB/s.)

SELECT
    day,
    bar(docs_ratio * 1000, 0, 100, 100) AS bar
FROM
(
    SELECT
        day,
        countIf(file_extension IN ('h', 'cpp', 'sql')) AS code,
        countIf(file_extension = 'md') AS docs,
        docs / (code + docs) AS docs_ratio
    FROM git.line_changes
    WHERE (sign = 1) AND (file_extension IN ('h', 'cpp', 'sql', 'md'))
    GROUP BY dayOfMonth(time) AS day
)

┌─day─┬─bar─────────────────────────────────────────────────────────────┐
│   1 │ ███████████████████████████████████▍                            │
│   2 │ ███████████████████████▋                                        │
│   3 │ ████████████████████████████████▋                               │
│   4 │ █████████████                                                   │
│   5 │ █████████████████████▎                                          │
│   6 │ ████████                                                        │
│   7 │ ███▋                                                            │
│   8 │ ████████▌                                                       │
│   9 │ ██████████████▎                                                 │
│  10 │ █████████████████▏                                              │
│  11 │ █████████████▎                                                  │
│  12 │ ███████████████████████████████████▋                            │
│  13 │ █████████████████████████████▎                                  │
│  14 │ ██████▋                                                         │
│  15 │ █████████████████████████████████████████▊                      │
│  16 │ ██████████▎                                                     │
│  17 │ ██████████████████████████████████████▋                         │
│  18 │ █████████████████████████████████▌                              │
│  19 │ ███████████                                                     │
│  20 │ █████████████████████████████████▊                              │
│  21 │ █████                                                           │
│  22 │ ███████████████████████▋                                        │
│  23 │ ███████████████████████████▌                                    │
│  24 │ ███████▌                                                        │
│  25 │ ██████████████████████████████████▎                             │
│  26 │ ███████████▏                                                    │
│  27 │ ███████████████████████████████████████████████████████████████ │
│  28 │ ████████████████████████████████████████████████████▏           │
│  29 │ ███▌                                                            │
│  30 │ ████████████████████████████████████████▎                       │
│  31 │ █████████████████████████████████▏                              │
└─────┴─────────────────────────────────────────────────────────────────┘

31 rows in set. Elapsed: 0.043 sec. Processed 7.54 million rows, 40.53 MB (176.71 million rows/s., 950.40 MB/s.)

SELECT
    author,
    uniq(path) AS num_files
FROM git.file_changes
WHERE (change_type IN ('Add', 'Modify')) AND (file_extension IN ('h', 'cpp', 'sql'))
GROUP BY author
ORDER BY num_files DESC
LIMIT 10

┌─author─────────────┬─num_files─┐
│ Alexey Milovidov   │      8433 │
│ Nikolai Kochetov   │      3257 │
│ Vitaly Baranov     │      2316 │
│ Maksim Kita        │      2172 │
│ Azat Khuzhin       │      1988 │
│ alesapin           │      1818 │
│ Alexander Tokmakov │      1751 │
│ Amos Bird          │      1641 │
│ Ivan               │      1629 │
│ alexey-milovidov   │      1581 │
└────────────────────┴───────────┘

10 rows in set. Elapsed: 0.041 sec. Processed 266.05 thousand rows, 4.92 MB (6.56 million rows/s., 121.21 MB/s.)

SELECT
    author,
    sum(num_files_commit) AS num_files
FROM
(
    SELECT
        author,
        commit_hash,
        uniq(path) AS num_files_commit,
        max(time) AS commit_time
    FROM git.file_changes
    WHERE (change_type IN ('Add', 'Modify')) AND (file_extension IN ('h', 'cpp', 'sql'))
    GROUP BY
        author,
        commit_hash
    ORDER BY
        author ASC,
        commit_time DESC
    LIMIT 3 BY author
)
GROUP BY author
ORDER BY num_files DESC
LIMIT 10

┌─author───────────────┬─num_files─┐
│ Mikhail              │       782 │
│ Li Yin               │       553 │
│ Roman Peshkurov      │       119 │
│ Vladimir Smirnov     │        88 │
│ f1yegor              │        65 │
│ maiha                │        54 │
│ Vitaliy Lyudvichenko │        53 │
│ Pradeep Chhetri      │        40 │
│ Orivej Desh          │        38 │
│ liyang               │        36 │
└──────────────────────┴───────────┘

10 rows in set. Elapsed: 0.106 sec. Processed 266.05 thousand rows, 21.04 MB (2.52 million rows/s., 198.93 MB/s.)

WITH current_files AS
    (
        SELECT path
        FROM
        (
            SELECT
                old_path AS path,
                max(time) AS last_time,
                2 AS change_type
            FROM git.file_changes
            GROUP BY old_path
            UNION ALL
            SELECT
                path,
                max(time) AS last_time,
                argMax(change_type, time) AS change_type
            FROM git.file_changes
            GROUP BY path
        )
        GROUP BY path
        HAVING (argMax(change_type, last_time) != 2) AND (NOT match(path, '(^dbms/)|(^libs/)|(^tests/testflows/)|(^programs/server/store/)'))
        ORDER BY path ASC
    )
SELECT
    path,
    count() AS c
FROM git.file_changes
WHERE (author = 'Alexey Milovidov') AND (path IN (current_files))
GROUP BY path
ORDER BY c DESC
LIMIT 10

┌─path────────────────────────────────────────┬───c─┐
│ CMakeLists.txt                              │ 165 │
│ CHANGELOG.md                                │ 126 │
│ programs/server/Server.cpp                  │  73 │
│ src/Storages/MergeTree/MergeTreeData.cpp    │  71 │
│ src/Storages/StorageReplicatedMergeTree.cpp │  68 │
│ src/Core/Settings.h                         │  65 │
│ programs/client/Client.cpp                  │  57 │
│ programs/server/play.html                   │  48 │
│ .gitmodules                                 │  47 │
│ programs/install/Install.cpp                │  37 │
└─────────────────────────────────────────────┴─────┘

10 rows in set. Elapsed: 0.106 sec. Processed 798.15 thousand rows, 13.97 MB (7.51 million rows/s., 131.41 MB/s.)

SELECT
    base,
    count() AS c
FROM git.file_changes
WHERE (author = 'Alexey Milovidov') AND (file_extension IN ('h', 'cpp', 'sql'))
GROUP BY basename(path) AS base
ORDER BY c DESC
LIMIT 10

┌─base───────────────────────────┬───c─┐
│ StorageReplicatedMergeTree.cpp │ 393 │
│ InterpreterSelectQuery.cpp     │ 299 │
│ Aggregator.cpp                 │ 297 │
│ Client.cpp                     │ 280 │
│ MergeTreeData.cpp              │ 274 │
│ Server.cpp                     │ 264 │
│ ExpressionAnalyzer.cpp         │ 259 │
│ StorageMergeTree.cpp           │ 239 │
│ Settings.h                     │ 225 │
│ TCPHandler.cpp                 │ 205 │
└────────────────────────────────┴─────┘
10 rows in set. Elapsed: 0.032 sec. Processed 266.05 thousand rows, 5.68 MB (8.22 million rows/s., 175.50 MB/s.)

WITH current_files AS
    (
        SELECT path
        FROM
        (
            SELECT
                old_path AS path,
                max(time) AS last_time,
                2 AS change_type
            FROM git.file_changes
            GROUP BY old_path
            UNION ALL
            SELECT
                path,
                max(time) AS last_time,
                argMax(change_type, time) AS change_type
            FROM git.file_changes
            GROUP BY path
        )
        GROUP BY path
        HAVING (argMax(change_type, last_time) != 2) AND (NOT match(path, '(^dbms/)|(^libs/)|(^tests/testflows/)|(^programs/server/store/)'))
        ORDER BY path ASC
    )
SELECT
    path,
    sum(lines_added) - sum(lines_deleted) AS num_lines,
    uniqExact(author) AS num_authors,
    num_lines / num_authors AS lines_author_ratio
FROM git.file_changes
WHERE path IN (current_files)
GROUP BY path
ORDER BY lines_author_ratio DESC
LIMIT 10

┌─path──────────────────────────────────────────────────────────────────┬─num_lines─┬─num_authors─┬─lines_author_ratio─┐
│ src/Common/ClassificationDictionaries/emotional_dictionary_rus.txt    │    148590 │           1 │             148590 │
│ src/Functions/ClassificationDictionaries/emotional_dictionary_rus.txt │     55533 │           1 │              55533 │
│ src/Functions/ClassificationDictionaries/charset_freq.txt             │     35722 │           1 │              35722 │
│ src/Common/ClassificationDictionaries/charset_freq.txt                │     35722 │           1 │              35722 │
│ tests/integration/test_storage_meilisearch/movies.json                │     19549 │           1 │              19549 │
│ tests/queries/0_stateless/02364_multiSearch_function_family.reference │     12874 │           1 │              12874 │
│ src/Functions/ClassificationDictionaries/programming_freq.txt         │      9434 │           1 │               9434 │
│ src/Common/ClassificationDictionaries/programming_freq.txt            │      9434 │           1 │               9434 │
│ tests/performance/explain_ast.xml                                     │      5911 │           1 │               5911 │
│ src/Analyzer/QueryAnalysisPass.cpp                                    │      5686 │           1 │               5686 │
└───────────────────────────────────────────────────────────────────────┴───────────┴─────────────┴────────────────────┘

10 rows in set. Elapsed: 0.138 sec. Processed 798.15 thousand rows, 16.57 MB (5.79 million rows/s., 120.11 MB/s.)

WITH current_files AS
    (
        SELECT path
        FROM
        (
            SELECT
                old_path AS path,
                max(time) AS last_time,
                2 AS change_type
            FROM git.file_changes
            GROUP BY old_path
            UNION ALL
            SELECT
                path,
                max(time) AS last_time,
                argMax(change_type, time) AS change_type
            FROM git.file_changes
            GROUP BY path
        )
        GROUP BY path
        HAVING (argMax(change_type, last_time) != 2) AND (NOT match(path, '(^dbms/)|(^libs/)|(^tests/testflows/)|(^programs/server/store/)'))
        ORDER BY path ASC
    )
SELECT
    path,
    sum(lines_added) - sum(lines_deleted) AS num_lines,
    uniqExact(author) AS num_authors,
    num_lines / num_authors AS lines_author_ratio
FROM git.file_changes
WHERE (path IN (current_files)) AND (file_extension IN ('h', 'cpp', 'sql'))
GROUP BY path
ORDER BY lines_author_ratio DESC
LIMIT 10

┌─path──────────────────────────────────┬─num_lines─┬─num_authors─┬─lines_author_ratio─┐
│ src/Analyzer/QueryAnalysisPass.cpp    │      5686 │           1 │               5686 │
│ src/Analyzer/QueryTreeBuilder.cpp     │       880 │           1 │                880 │
│ src/Planner/Planner.cpp               │       873 │           1 │                873 │
│ src/Backups/RestorerFromBackup.cpp    │       869 │           1 │                869 │
│ utils/memcpy-bench/FastMemcpy.h       │       770 │           1 │                770 │
│ src/Planner/PlannerActionsVisitor.cpp │       765 │           1 │                765 │
│ src/Functions/sphinxstemen.cpp        │       728 │           1 │                728 │
│ src/Planner/PlannerJoinTree.cpp       │       708 │           1 │                708 │
│ src/Planner/PlannerJoins.cpp          │       695 │           1 │                695 │
│ src/Analyzer/QueryNode.h              │       607 │           1 │                607 │
└───────────────────────────────────────┴───────────┴─────────────┴────────────────────┘
10 rows in set. Elapsed: 0.140 sec. Processed 798.15 thousand rows, 16.84 MB (5.70 million rows/s., 120.32 MB/s.)

WITH current_files AS
    (
        SELECT path
        FROM
        (
            SELECT
                old_path AS path,
                max(time) AS last_time,
                2 AS change_type
            FROM git.file_changes
            GROUP BY old_path
            UNION ALL
            SELECT
                path,
                max(time) AS last_time,
                argMax(change_type, time) AS change_type
            FROM git.file_changes
            GROUP BY path
        )
        GROUP BY path
        HAVING (argMax(change_type, last_time) != 2) AND (NOT match(path, '(^dbms/)|(^libs/)|(^tests/testflows/)|(^programs/server/store/)'))
        ORDER BY path ASC
    )
SELECT
    min(time) AS min_date,
    path,
    sum(lines_added) - sum(lines_deleted) AS num_lines,
    uniqExact(author) AS num_authors,
    num_lines / num_authors AS lines_author_ratio
FROM git.file_changes
WHERE (path IN (current_files)) AND (file_extension IN ('h', 'cpp', 'sql'))
GROUP BY path
HAVING min_date <= (now() - toIntervalYear(1))
ORDER BY lines_author_ratio DESC
LIMIT 10

┌────────────min_date─┬─path───────────────────────────────────────────────────────────┬─num_lines─┬─num_authors─┬─lines_author_ratio─┐
│ 2021-03-08 07:00:54 │ utils/memcpy-bench/FastMemcpy.h                                │       770 │           1 │                770 │
│ 2021-05-04 13:47:34 │ src/Functions/sphinxstemen.cpp                                 │       728 │           1 │                728 │
│ 2021-03-14 16:52:51 │ utils/memcpy-bench/glibc/dwarf2.h                              │       592 │           1 │                592 │
│ 2021-03-08 09:04:52 │ utils/memcpy-bench/FastMemcpy_Avx.h                            │       496 │           1 │                496 │
│ 2020-10-19 01:10:50 │ tests/queries/0_stateless/01518_nullable_aggregate_states2.sql │       411 │           1 │                411 │
│ 2020-11-24 14:53:34 │ programs/server/GRPCHandler.cpp                                │       399 │           1 │                399 │
│ 2021-03-09 14:10:28 │ src/DataTypes/Serializations/SerializationSparse.cpp           │       363 │           1 │                363 │
│ 2021-08-20 15:06:57 │ src/Functions/vectorFunctions.cpp                              │      1327 │           4 │             331.75 │
│ 2020-08-04 03:26:23 │ src/Interpreters/MySQL/CreateQueryConvertVisitor.cpp           │       311 │           1 │                311 │
│ 2020-11-06 15:45:13 │ src/Storages/Rocksdb/StorageEmbeddedRocksdb.cpp                │       611 │           2 │              305.5 │
└─────────────────────┴────────────────────────────────────────────────────────────────┴───────────┴─────────────┴────────────────────┘

10 rows in set. Elapsed: 0.143 sec. Processed 798.15 thousand rows, 18.00 MB (5.58 million rows/s., 125.87 MB/s.)

SELECT
    dayOfWeek,
    uniq(commit_hash) AS commits,
    sum(lines_added) AS lines_added,
    sum(lines_deleted) AS lines_deleted
FROM git.file_changes
WHERE path LIKE 'src/Functions%'
GROUP BY toDayOfWeek(time) AS dayOfWeek

┌─dayOfWeek─┬─commits─┬─lines_added─┬─lines_deleted─┐
│         1 │     476 │       24619 │         15782 │
│         2 │     434 │       18098 │          9938 │
│         3 │     496 │       26562 │         20883 │
│         4 │     587 │       65674 │         18862 │
│         5 │     504 │       85917 │         14518 │
│         6 │     314 │       13604 │         10144 │
│         7 │     294 │       11938 │          6451 │
└───────────┴─────────┴─────────────┴───────────────┘

7 rows in set. Elapsed: 0.034 sec. Processed 266.05 thousand rows, 14.66 MB (7.73 million rows/s., 425.56 MB/s.)

SELECT
    hourOfDay,
    uniq(commit_hash) AS commits,
    sum(lines_added) AS lines_added,
    sum(lines_deleted) AS lines_deleted
FROM git.file_changes
WHERE path LIKE 'src/Functions%'
GROUP BY toHour(time) AS hourOfDay

┌─hourOfDay─┬─commits─┬─lines_added─┬─lines_deleted─┐
│         0 │      71 │        4169 │          3404 │
│         1 │      90 │        2174 │          1927 │
│         2 │      65 │        2343 │          1515 │
│         3 │      76 │        2552 │           493 │
│         4 │      62 │        1480 │          1304 │
│         5 │      38 │        1644 │           253 │
│         6 │     104 │        4434 │          2979 │
│         7 │     117 │        4171 │          1678 │
│         8 │     106 │        4604 │          4673 │
│         9 │     135 │       60550 │          2678 │
│        10 │     149 │        6133 │          3482 │
│        11 │     182 │        8040 │          3833 │
│        12 │     209 │       29428 │         15040 │
│        13 │     187 │       10204 │          5491 │
│        14 │     204 │        9028 │          6060 │
│        15 │     231 │       15179 │         10077 │
│        16 │     196 │        9568 │          5925 │
│        17 │     138 │        4941 │          3849 │
│        18 │     123 │        4193 │          3036 │
│        19 │     165 │        8817 │          6646 │
│        20 │     140 │        3749 │          2379 │
│        21 │     132 │       41585 │          4182 │
│        22 │      85 │        4094 │          3955 │
│        23 │     100 │        3332 │          1719 │
└───────────┴─────────┴─────────────┴───────────────┘

24 rows in set. Elapsed: 0.039 sec. Processed 266.05 thousand rows, 14.66 MB (6.77 million rows/s., 372.89 MB/s.)

SELECT
    hourOfDay,
    bar(commits, 0, 400, 50) AS commits,
    bar(lines_added, 0, 30000, 50) AS lines_added,
    bar(lines_deleted, 0, 15000, 50) AS lines_deleted
FROM
(
    SELECT
        hourOfDay,
        uniq(commit_hash) AS commits,
        sum(lines_added) AS lines_added,
        sum(lines_deleted) AS lines_deleted
    FROM git.file_changes
    WHERE path LIKE 'src/Functions%'
    GROUP BY toHour(time) AS hourOfDay
)

┌─hourOfDay─┬─commits───────────────────────┬─lines_added────────────────────────────────────────┬─lines_deleted──────────────────────────────────────┐
│         0 │ ████████▊                     │ ██████▊                                            │ ███████████▎                                       │
│         1 │ ███████████▎                  │ ███▌                                               │ ██████▍                                            │
│         2 │ ████████                      │ ███▊                                               │ █████                                              │
│         3 │ █████████▌                    │ ████▎                                              │ █▋                                                 │
│         4 │ ███████▋                      │ ██▍                                                │ ████▎                                              │
│         5 │ ████▋                         │ ██▋                                                │ ▋                                                  │
│         6 │ █████████████                 │ ███████▍                                           │ █████████▊                                         │
│         7 │ ██████████████▋               │ ██████▊                                            │ █████▌                                             │
│         8 │ █████████████▎                │ ███████▋                                           │ ███████████████▌                                   │
│         9 │ ████████████████▊             │ ██████████████████████████████████████████████████ │ ████████▊                                          │
│        10 │ ██████████████████▋           │ ██████████▏                                        │ ███████████▌                                       │
│        11 │ ██████████████████████▋       │ █████████████▍                                     │ ████████████▋                                      │
│        12 │ ██████████████████████████    │ █████████████████████████████████████████████████  │ ██████████████████████████████████████████████████ │
│        13 │ ███████████████████████▍      │ █████████████████                                  │ ██████████████████▎                                │
│        14 │ █████████████████████████▌    │ ███████████████                                    │ ████████████████████▏                              │
│        15 │ ████████████████████████████▊ │ █████████████████████████▎                         │ █████████████████████████████████▌                 │
│        16 │ ████████████████████████▌     │ ███████████████▊                                   │ ███████████████████▋                               │
│        17 │ █████████████████▎            │ ████████▏                                          │ ████████████▋                                      │
│        18 │ ███████████████▍              │ ██████▊                                            │ ██████████                                         │
│        19 │ ████████████████████▋         │ ██████████████▋                                    │ ██████████████████████▏                            │
│        20 │ █████████████████▌            │ ██████▏                                            │ ███████▊                                           │
│        21 │ ████████████████▌             │ ██████████████████████████████████████████████████ │ █████████████▊                                     │
│        22 │ ██████████▋                   │ ██████▋                                            │ █████████████▏                                     │
│        23 │ ████████████▌                 │ █████▌                                             │ █████▋                                             │
└───────────┴───────────────────────────────┴────────────────────────────────────────────────────┴────────────────────────────────────────────────────┘

24 rows in set. Elapsed: 0.038 sec. Processed 266.05 thousand rows, 14.66 MB (7.09 million rows/s., 390.69 MB/s.)

SELECT
    prev_author || '(a)' AS add_author,
    author  || '(d)' AS delete_author,
    count() AS c
FROM git.line_changes
WHERE (sign = -1) AND (file_extension IN ('h', 'cpp')) AND (line_type NOT IN ('Punct', 'Empty')) AND (author != prev_author) AND (prev_author != '')
GROUP BY
    prev_author,
    author
ORDER BY c DESC
LIMIT 1 BY prev_author
LIMIT 100

┌─prev_author──────────┬─author───────────┬─────c─┐
│ Ivan                 │ Alexey Milovidov │ 18554 │
│ Alexey Arno          │ Alexey Milovidov │ 18475 │
│ Michael Kolupaev     │ Alexey Milovidov │ 14135 │
│ Alexey Milovidov     │ Nikolai Kochetov │ 13435 │
│ Andrey Mironov       │ Alexey Milovidov │ 10418 │
│ proller              │ Alexey Milovidov │  7280 │
│ Nikolai Kochetov     │ Alexey Milovidov │  6806 │
│ alexey-milovidov     │ Alexey Milovidov │  5027 │
│ Vitaliy Lyudvichenko │ Alexey Milovidov │  4390 │
│ Amos Bird            │ Ivan Lezhankin   │  3125 │
│ f1yegor              │ Alexey Milovidov │  3119 │
│ Pavel Kartavyy       │ Alexey Milovidov │  3087 │
│ Alexey Zatelepin     │ Alexey Milovidov │  2978 │
│ alesapin             │ Alexey Milovidov │  2949 │
│ Sergey Fedorov       │ Alexey Milovidov │  2727 │
│ Ivan Lezhankin       │ Alexey Milovidov │  2618 │
│ Vasily Nemkov        │ Alexey Milovidov │  2547 │
│ Alexander Tokmakov   │ Alexey Milovidov │  2493 │
│ Nikita Vasilev       │ Maksim Kita      │  2420 │
│ Anton Popov          │ Amos Bird        │  2127 │
└──────────────────────┴──────────────────┴───────┘

20 rows in set. Elapsed: 0.098 sec. Processed 7.54 million rows, 42.16 MB (76.67 million rows/s., 428.99 MB/s.)

SELECT
    day_of_week,
    author,
    count() AS c
FROM git.commits
GROUP BY
    dayOfWeek(time) AS day_of_week,
    author
ORDER BY
    day_of_week ASC,
    c DESC
LIMIT 1 BY day_of_week

┌─day_of_week─┬─author───────────┬────c─┐
│           1 │ Alexey Milovidov │ 2204 │
│           2 │ Alexey Milovidov │ 1588 │
│           3 │ Alexey Milovidov │ 1725 │
│           4 │ Alexey Milovidov │ 1915 │
│           5 │ Alexey Milovidov │ 1940 │
│           6 │ Alexey Milovidov │ 1851 │
│           7 │ Alexey Milovidov │ 2400 │
└─────────────┴──────────────────┴──────┘

7 rows in set. Elapsed: 0.012 sec. Processed 62.78 thousand rows, 395.47 KB (5.44 million rows/s., 34.27 MB/s.)

SELECT
    day_of_week,
    author,
    count() AS c
FROM git.commits
WHERE time > (now() - toIntervalYear(1))
GROUP BY
    dayOfWeek(time) AS day_of_week,
    author
ORDER BY
    day_of_week ASC,
    c DESC
LIMIT 1 BY day_of_week

┌─day_of_week─┬─author───────────┬───c─┐
│           1 │ Alexey Milovidov │ 198 │
│           2 │ alesapin         │ 162 │
│           3 │ alesapin         │ 163 │
│           4 │ Azat Khuzhin     │ 166 │
│           5 │ alesapin         │ 191 │
│           6 │ Alexey Milovidov │ 179 │
│           7 │ Alexey Milovidov │ 243 │
└─────────────┴──────────────────┴─────┘

7 rows in set. Elapsed: 0.004 sec. Processed 21.82 thousand rows, 140.02 KB (4.88 million rows/s., 31.29 MB/s.)

SELECT
    top_author.day_of_week,
    top_author.author,
    top_author.author_work / all_work.total_work AS top_author_percent
FROM
(
    SELECT
        day_of_week,
        author,
        sum(lines_added) + sum(lines_deleted) AS author_work
    FROM git.file_changes
    WHERE time > (now() - toIntervalYear(1))
    GROUP BY
        author,
        dayOfWeek(time) AS day_of_week
    ORDER BY
        day_of_week ASC,
        author_work DESC
    LIMIT 1 BY day_of_week
) AS top_author
INNER JOIN
(
    SELECT
        day_of_week,
        sum(lines_added) + sum(lines_deleted) AS total_work
    FROM git.file_changes
    WHERE time > (now() - toIntervalYear(1))
    GROUP BY dayOfWeek(time) AS day_of_week
) AS all_work USING (day_of_week)

┌─day_of_week─┬─author──────────────┬──top_author_percent─┐
│           1 │ Alexey Milovidov    │  0.3168282877768332 │
│           2 │ Mikhail f. Shiryaev │  0.3523434231193969 │
│           3 │ vdimir              │ 0.11859742484577324 │
│           4 │ Nikolay Degterinsky │ 0.34577318920318467 │
│           5 │ Alexey Milovidov    │ 0.13208704423684223 │
│           6 │ Alexey Milovidov    │ 0.18895257783624633 │
│           7 │ Robert Schulze      │  0.3617405888930302 │
└─────────────┴─────────────────────┴─────────────────────┘

7 rows in set. Elapsed: 0.014 sec. Processed 106.12 thousand rows, 1.38 MB (7.61 million rows/s., 98.65 MB/s.)

WITH current_files AS
    (
        SELECT path
        FROM
        (
            SELECT
                old_path AS path,
                max(time) AS last_time,
                2 AS change_type
            FROM git.file_changes
            GROUP BY old_path
            UNION ALL
            SELECT
                path,
                max(time) AS last_time,
                argMax(change_type, time) AS change_type
            FROM git.file_changes
            GROUP BY path
        )
        GROUP BY path
        HAVING (argMax(change_type, last_time) != 2) AND (NOT match(path, '(^dbms/)|(^libs/)|(^tests/testflows/)|(^programs/server/store/)'))
        ORDER BY path ASC
    )
SELECT
    concat(root, '/', sub_folder) AS folder,
    round(avg(days_present)) AS avg_age_of_files,
    min(days_present) AS min_age_files,
    max(days_present) AS max_age_files,
    count() AS c
FROM
(
    SELECT
        path,
        dateDiff('day', min(time), toDate('2022-11-03')) AS days_present
    FROM git.file_changes
    WHERE (path IN (current_files)) AND (file_extension IN ('h', 'cpp', 'sql'))
    GROUP BY path
)
GROUP BY
    splitByChar('/', path)[1] AS root,
    splitByChar('/', path)[2] AS sub_folder
ORDER BY
    root ASC,
    c DESC
LIMIT 5 BY root

┌─folder───────────────────────────┬─avg_age_of_files─┬─min_age_files─┬─max_age_files─┬────c─┐
│ base/base                        │              387 │           201 │           397 │   84 │
│ base/glibc-compatibility         │              887 │            59 │           993 │   19 │
│ base/consistent-hashing          │              993 │           993 │           993 │    5 │
│ base/widechar_width              │              993 │           993 │           993 │    2 │
│ base/consistent-hashing-sumbur   │              993 │           993 │           993 │    2 │
│ docker/test                      │             1043 │          1043 │          1043 │    1 │
│ programs/odbc-bridge             │              835 │            91 │           945 │   25 │
│ programs/copier                  │              587 │            14 │           945 │   22 │
│ programs/library-bridge          │              155 │            47 │           608 │   21 │
│ programs/disks                   │              144 │            62 │           150 │   14 │
│ programs/server                  │              874 │           709 │           945 │   10 │
│ rust/BLAKE3                      │               52 │            52 │            52 │    1 │
│ src/Functions                    │              752 │             0 │           944 │  809 │
│ src/Storages                     │              700 │             8 │           944 │  736 │
│ src/Interpreters                 │              684 │             3 │           944 │  490 │
│ src/Processors                   │              703 │            44 │           944 │  482 │
│ src/Common                       │              673 │             7 │           944 │  473 │
│ tests/queries                    │              674 │            -5 │           945 │ 3777 │
│ tests/integration                │              656 │           132 │           945 │    4 │
│ utils/memcpy-bench               │              601 │           599 │           605 │   10 │
│ utils/keeper-bench               │              570 │           569 │           570 │    7 │
│ utils/durability-test            │              793 │           793 │           793 │    4 │
│ utils/self-extracting-executable │              143 │           143 │           143 │    3 │
│ utils/self-extr-exec             │              224 │           224 │           224 │    2 │
└──────────────────────────────────┴──────────────────┴───────────────┴───────────────┴──────┘

24 rows in set. Elapsed: 0.129 sec. Processed 798.15 thousand rows, 15.11 MB (6.19 million rows/s., 117.08 MB/s.)

SELECT
    k,
    written_code.c,
    removed_code.c,
    removed_code.c / written_code.c AS remove_ratio
FROM
(
    SELECT
        author AS k,
        count() AS c
    FROM git.line_changes
    WHERE (sign = 1) AND (file_extension IN ('h', 'cpp')) AND (line_type NOT IN ('Punct', 'Empty'))
    GROUP BY k
) AS written_code
INNER JOIN
(
    SELECT
        prev_author AS k,
        count() AS c
    FROM git.line_changes
    WHERE (sign = -1) AND (file_extension IN ('h', 'cpp')) AND (line_type NOT IN ('Punct', 'Empty')) AND (author != prev_author)
    GROUP BY k
) AS removed_code USING (k)
WHERE written_code.c > 1000
ORDER BY remove_ratio DESC
LIMIT 10

┌─k──────────────────┬─────c─┬─removed_code.c─┬───────remove_ratio─┐
│ Marek Vavruša      │  1458 │           1318 │ 0.9039780521262003 │
│ Ivan               │ 32715 │          27500 │ 0.8405930001528351 │
│ artpaul            │  3450 │           2840 │ 0.8231884057971014 │
│ Silviu Caragea     │  1542 │           1209 │ 0.7840466926070039 │
│ Ruslan             │  1027 │            802 │ 0.7809152872444012 │
│ Tsarkova Anastasia │  1755 │           1364 │ 0.7772079772079772 │
│ Vyacheslav Alipov  │  3526 │           2727 │ 0.7733976176971072 │
│ Marek Vavruša      │  1467 │           1124 │ 0.7661895023858214 │
│ f1yegor            │  7194 │           5213 │ 0.7246316374756742 │
│ kreuzerkrieg       │  3406 │           2468 │  0.724603640634175 │
└────────────────────┴───────┴────────────────┴────────────────────┘

10 rows in set. Elapsed: 0.126 sec. Processed 15.07 million rows, 73.51 MB (119.97 million rows/s., 585.16 MB/s.)

WITH current_files AS
    (
        SELECT path
        FROM
        (
            SELECT
                old_path AS path,
                max(time) AS last_time,
                2 AS change_type
            FROM git.file_changes
            GROUP BY old_path
            UNION ALL
            SELECT
                path,
                max(time) AS last_time,
                argMax(change_type, time) AS change_type
            FROM git.file_changes
            GROUP BY path
        )
        GROUP BY path
        HAVING (argMax(change_type, last_time) != 2) AND (NOT match(path, '(^dbms/)|(^libs/)|(^tests/testflows/)|(^programs/server/store/)'))
        ORDER BY path ASC
    )
SELECT
    path,
    count() AS c
FROM git.line_changes
WHERE (file_extension IN ('h', 'cpp', 'sql')) AND (path IN (current_files))
GROUP BY path
ORDER BY c DESC
LIMIT 10

┌─path───────────────────────────────────────────────────┬─────c─┐
│ src/Storages/StorageReplicatedMergeTree.cpp            │ 21871 │
│ src/Storages/MergeTree/MergeTreeData.cpp               │ 17709 │
│ programs/client/Client.cpp                             │ 15882 │
│ src/Storages/MergeTree/MergeTreeDataSelectExecutor.cpp │ 14249 │
│ src/Interpreters/InterpreterSelectQuery.cpp            │ 12636 │
│ src/Parsers/ExpressionListParsers.cpp                  │ 11794 │
│ src/Analyzer/QueryAnalysisPass.cpp                     │ 11760 │
│ src/Coordination/KeeperStorage.cpp                     │ 10225 │
│ src/Functions/FunctionsConversion.h                    │  9247 │
│ src/Parsers/ExpressionElementParsers.cpp               │  8197 │
└────────────────────────────────────────────────────────┴───────┘

10 rows in set. Elapsed: 0.160 sec. Processed 8.07 million rows, 98.99 MB (50.49 million rows/s., 619.49 MB/s.)

WITH
    current_files AS
    (
        SELECT path
        FROM
        (
            SELECT
                old_path AS path,
                max(time) AS last_time,
                2 AS change_type
            FROM git.file_changes
            GROUP BY old_path
            UNION ALL
            SELECT
                path,
                max(time) AS last_time,
                argMax(change_type, time) AS change_type
            FROM git.file_changes
            GROUP BY path
        )
        GROUP BY path
        HAVING (argMax(change_type, last_time) != 2) AND (NOT match(path, '(^dbms/)|(^libs/)|(^tests/testflows/)|(^programs/server/store/)'))
        ORDER BY path ASC
    ),
    changes AS
    (
        SELECT
            path,
            max(time) AS max_time,
            commit_hash,
            any(lines_added) AS num_added,
            any(lines_deleted) AS num_deleted,
            any(change_type) AS type
        FROM git.file_changes
        WHERE (change_type IN ('Add', 'Modify')) AND (path IN (current_files)) AND (file_extension IN ('h', 'cpp', 'sql'))
        GROUP BY
            path,
            commit_hash
        ORDER BY
            path ASC,
            max_time ASC
    ),
    rewrites AS
    (
        SELECT
            path,
            commit_hash,
            max_time,
            type,
            num_added,
            num_deleted,
            sum(num_added - num_deleted) OVER (PARTITION BY path ORDER BY max_time ASC) AS current_size,
            if(current_size > 0, num_added / current_size, 0) AS percent_add,
            if(current_size > 0, num_deleted / current_size, 0) AS percent_delete
        FROM changes
    )
SELECT
    path,
    count() AS num_rewrites
FROM rewrites
WHERE (type = 'Modify') AND (percent_add >= 0.5) AND (percent_delete >= 0.5) AND (current_size > 50)
GROUP BY path
ORDER BY num_rewrites DESC
LIMIT 10

┌─path──────────────────────────────────────────────────┬─num_rewrites─┐
│ src/Storages/WindowView/StorageWindowView.cpp         │            8 │
│ src/Functions/array/arrayIndex.h                      │            7 │
│ src/Dictionaries/CacheDictionary.cpp                  │            6 │
│ src/Dictionaries/RangeHashedDictionary.cpp            │            5 │
│ programs/client/Client.cpp                            │            4 │
│ src/Functions/polygonPerimeter.cpp                    │            4 │
│ src/Functions/polygonsEquals.cpp                      │            4 │
│ src/Functions/polygonsWithin.cpp                      │            4 │
│ src/Processors/Formats/Impl/ArrowColumnToCHColumn.cpp │            4 │
│ src/Functions/polygonsSymDifference.cpp               │            4 │
└───────────────────────────────────────────────────────┴──────────────┘

10 rows in set. Elapsed: 0.299 sec. Processed 798.15 thousand rows, 31.52 MB (2.67 million rows/s., 105.29 MB/s.)

SELECT
    day_of_week_added,
    count() AS num,
    avg(days_present) AS avg_days_present
FROM
(
    SELECT
        added_code.line,
        added_code.time AS added_day,
        dateDiff('day', added_code.time, removed_code.time) AS days_present
    FROM
    (
        SELECT
            path,
            line,
            max(time) AS time
        FROM git.line_changes
        WHERE (sign = 1) AND (line_type NOT IN ('Punct', 'Empty'))
        GROUP BY
            path,
            line
    ) AS added_code
    INNER JOIN
    (
        SELECT
            path,
            line,
            max(time) AS time
        FROM git.line_changes
        WHERE (sign = -1) AND (line_type NOT IN ('Punct', 'Empty'))
        GROUP BY
            path,
            line
    ) AS removed_code USING (path, line)
    WHERE removed_code.time > added_code.time
)
GROUP BY dayOfWeek(added_day) AS day_of_week_added

┌─day_of_week_added─┬────num─┬───avg_days_present─┐
│                 1 │ 171879 │ 193.81759260875384 │
│                 2 │ 141448 │  153.0931013517335 │
│                 3 │ 161230 │ 137.61553681076722 │
│                 4 │ 255728 │ 121.14149799787273 │
│                 5 │ 203907 │ 141.60181847606998 │
│                 6 │  62305 │ 202.43449161383518 │
│                 7 │  70904 │  220.0266134491707 │
└───────────────────┴────────┴────────────────────┘

7 rows in set. Elapsed: 3.965 sec. Processed 15.07 million rows, 1.92 GB (3.80 million rows/s., 483.50 MB/s.)

WITH
    current_files AS
    (
        SELECT path
        FROM
        (
            SELECT
                old_path AS path,
                max(time) AS last_time,
                2 AS change_type
            FROM git.file_changes
            GROUP BY old_path
            UNION ALL
            SELECT
                path,
                max(time) AS last_time,
                argMax(change_type, time) AS change_type
            FROM git.clickhouse_file_changes
            GROUP BY path
        )
        GROUP BY path
        HAVING (argMax(change_type, last_time) != 2) AND (NOT match(path, '(^dbms/)|(^libs/)|(^tests/testflows/)|(^programs/server/store/)'))
        ORDER BY path ASC
    ),
    lines_removed AS
    (
        SELECT
            added_code.path AS path,
            added_code.line,
            added_code.time AS added_day,
            dateDiff('day', added_code.time, removed_code.time) AS days_present
        FROM
        (
            SELECT
                path,
                line,
                max(time) AS time,
                any(file_extension) AS file_extension
            FROM git.line_changes
            WHERE (sign = 1) AND (line_type NOT IN ('Punct', 'Empty'))
            GROUP BY
                path,
                line
        ) AS added_code
        INNER JOIN
        (
            SELECT
                path,
                line,
                max(time) AS time
            FROM git.line_changes
            WHERE (sign = -1) AND (line_type NOT IN ('Punct', 'Empty'))
            GROUP BY
                path,
                line
        ) AS removed_code USING (path, line)
        WHERE (removed_code.time > added_code.time) AND (path IN (current_files)) AND (file_extension IN ('h', 'cpp', 'sql'))
    )
SELECT
    path,
    avg(days_present) AS avg_code_age
FROM lines_removed
GROUP BY path
ORDER BY avg_code_age DESC
LIMIT 10

┌─path────────────────────────────────────────────────────────────┬──────avg_code_age─┐
│ utils/corrector_utf8/corrector_utf8.cpp                         │ 1353.888888888889 │
│ tests/queries/0_stateless/01288_shard_max_network_bandwidth.sql │               881 │
│ src/Functions/replaceRegexpOne.cpp                              │               861 │
│ src/Functions/replaceRegexpAll.cpp                              │               861 │
│ src/Functions/replaceOne.cpp                                    │               861 │
│ utils/zookeeper-remove-by-list/main.cpp                         │            838.25 │
│ tests/queries/0_stateless/01356_state_resample.sql              │               819 │
│ tests/queries/0_stateless/01293_create_role.sql                 │               819 │
│ src/Functions/ReplaceStringImpl.h                               │               810 │
│ src/Interpreters/createBlockSelector.cpp                        │               795 │
└─────────────────────────────────────────────────────────────────┴───────────────────┘

10 rows in set. Elapsed: 3.134 sec. Processed 16.13 million rows, 1.83 GB (5.15 million rows/s., 582.99 MB/s.)

SELECT
    author,
    countIf((file_extension IN ('h', 'cpp', 'sql', 'sh', 'py', 'expect')) AND (path LIKE '%tests%')) AS test,
    countIf((file_extension IN ('h', 'cpp', 'sql')) AND (NOT (path LIKE '%tests%'))) AS code,
    code / (code + test) AS ratio_code
FROM git.clickhouse_file_changes
GROUP BY author
HAVING code > 20
ORDER BY code DESC
LIMIT 20

┌─author───────────────┬─test─┬──code─┬─────────ratio_code─┐
│ Alexey Milovidov     │ 6617 │ 41799 │ 0.8633303040317251 │
│ Nikolai Kochetov     │  916 │ 13361 │ 0.9358408629263851 │
│ alesapin             │ 2408 │  8796 │  0.785076758300607 │
│ kssenii              │  869 │  6769 │ 0.8862267609321812 │
│ Maksim Kita          │  799 │  5862 │ 0.8800480408347096 │
│ Alexander Tokmakov   │ 1472 │  5727 │ 0.7955271565495208 │
│ Vitaly Baranov       │ 1764 │  5521 │ 0.7578586135895676 │
│ Ivan Lezhankin       │  843 │  4698 │ 0.8478613968597726 │
│ Anton Popov          │  599 │  4346 │ 0.8788675429726996 │
│ Ivan                 │ 2630 │  4269 │ 0.6187853312074214 │
│ Azat Khuzhin         │ 1664 │  3697 │  0.689610147360567 │
│ Amos Bird            │  400 │  2901 │ 0.8788245986064829 │
│ proller              │ 1207 │  2377 │ 0.6632254464285714 │
│ chertus              │  453 │  2359 │ 0.8389046941678521 │
│ alexey-milovidov     │  303 │  2321 │ 0.8845274390243902 │
│ Alexey Arno          │  169 │  2310 │ 0.9318273497377975 │
│ Vitaliy Lyudvichenko │  334 │  2283 │ 0.8723729461215132 │
│ Robert Schulze       │  182 │  2196 │ 0.9234650967199327 │
│ CurtizJ              │  460 │  2158 │ 0.8242933537051184 │
│ Alexander Kuzmenkov  │  298 │  2092 │ 0.8753138075313808 │
└──────────────────────┴──────┴───────┴────────────────────┘

20 rows in set. Elapsed: 0.034 sec. Processed 266.05 thousand rows, 4.65 MB (7.93 million rows/s., 138.76 MB/s.)

WITH (
        SELECT histogram(10)(ratio_code) AS hist
        FROM
        (
            SELECT
                author,
                countIf((file_extension IN ('h', 'cpp', 'sql', 'sh', 'py', 'expect')) AND (path LIKE '%tests%')) AS test,
                countIf((file_extension IN ('h', 'cpp', 'sql')) AND (NOT (path LIKE '%tests%'))) AS code,
                code / (code + test) AS ratio_code
            FROM git.clickhouse_file_changes
            GROUP BY author
            HAVING code > 20
            ORDER BY code DESC
            LIMIT 20
        )
    ) AS hist
SELECT
    arrayJoin(hist).1 AS lower,
    arrayJoin(hist).2 AS upper,
    bar(arrayJoin(hist).3, 0, 100, 500) AS bar

┌──────────────lower─┬──────────────upper─┬─bar───────────────────────────┐
│ 0.6187853312074214 │ 0.6410053888179964 │ █████                         │
│ 0.6410053888179964 │ 0.6764177968945693 │ █████                         │
│ 0.6764177968945693 │ 0.7237343804750673 │ █████                         │
│ 0.7237343804750673 │ 0.7740802855073157 │ █████▋                        │
│ 0.7740802855073157 │  0.807297655565091 │ ████████▋                     │
│  0.807297655565091 │ 0.8338381996094653 │ ██████▎                       │
│ 0.8338381996094653 │ 0.8533566747727687 │ ████████▋                     │
│ 0.8533566747727687 │  0.871392376017531 │ █████████▍                    │
│  0.871392376017531 │  0.904916108899021 │ ████████████████████████████▋ │
│  0.904916108899021 │ 0.9358408629263851 │ █████████████████▌            │
└────────────────────┴────────────────────┴───────────────────────────────┘
10 rows in set. Elapsed: 0.051 sec. Processed 266.05 thousand rows, 4.65 MB (5.24 million rows/s., 91.64 MB/s.)

SELECT
    author,
    avg(ratio_comments) AS avg_ratio_comments,
    sum(code) AS code
FROM
(
    SELECT
        author,
        commit_hash,
        countIf(line_type = 'Comment') AS comments,
        countIf(line_type = 'Code') AS code,
        if(comments > 0, comments / (comments + code), 0) AS ratio_comments
    FROM git.clickhouse_line_changes
    GROUP BY
        author,
        commit_hash
)
GROUP BY author
ORDER BY code DESC
LIMIT 10

┌─author─────────────┬──avg_ratio_comments─┬────code─┐
│ Alexey Milovidov   │  0.1034915408309902 │ 1147196 │
│ s-kat              │  0.1361718900215362 │  614224 │
│ Nikolai Kochetov   │ 0.08722993407690126 │  218328 │
│ alesapin           │  0.1040477684726504 │  198082 │
│ Vitaly Baranov     │ 0.06446875712939285 │  161801 │
│ Maksim Kita        │ 0.06863376297549255 │  156381 │
│ Alexey Arno        │ 0.11252677608033655 │  146642 │
│ Vitaliy Zakaznikov │ 0.06199215397180561 │  138530 │
│ kssenii            │ 0.07455322590796751 │  131143 │
│ Artur              │ 0.12383737231074826 │  121484 │
└────────────────────┴─────────────────────┴─────────┘
10 rows in set. Elapsed: 0.290 sec. Processed 7.54 million rows, 394.57 MB (26.00 million rows/s., 1.36 GB/s.)

SELECT
    author,
    countIf(line_type = 'Code') AS code_lines,
    countIf((line_type = 'Comment') OR (line_type = 'Punct')) AS comments,
    code_lines / (comments + code_lines) AS ratio_code,
    toStartOfWeek(time) AS week
FROM git.line_changes
GROUP BY
    time,
    author
ORDER BY
    author ASC,
    time ASC
LIMIT 10

┌─author──────────────────────┬─code_lines─┬─comments─┬─────────ratio_code─┬───────week─┐
│ 1lann                       │          8 │        0 │                  1 │ 2022-03-06 │
│ 20018712                    │          2 │        0 │                  1 │ 2020-09-13 │
│ 243f6a8885a308d313198a2e037 │          0 │        2 │                  0 │ 2020-12-06 │
│ 243f6a8885a308d313198a2e037 │          0 │      112 │                  0 │ 2020-12-06 │
│ 243f6a8885a308d313198a2e037 │          0 │       14 │                  0 │ 2020-12-06 │
│ 3ldar-nasyrov               │          2 │        0 │                  1 │ 2021-03-14 │
│ 821008736@qq.com            │         27 │        2 │ 0.9310344827586207 │ 2019-04-21 │
│ ANDREI STAROVEROV           │        182 │       60 │ 0.7520661157024794 │ 2021-05-09 │
│ ANDREI STAROVEROV           │          7 │        0 │                  1 │ 2021-05-09 │
│ ANDREI STAROVEROV           │         32 │       12 │ 0.7272727272727273 │ 2021-05-09 │
└─────────────────────────────┴────────────┴──────────┴────────────────────┴────────────┘

10 rows in set. Elapsed: 0.145 sec. Processed 7.54 million rows, 51.09 MB (51.83 million rows/s., 351.44 MB/s.)

WITH author_ratios_by_offset AS
    (
        SELECT
            author,
            dateDiff('week', start_dates.start_date, contributions.week) AS week_offset,
            ratio_code
        FROM
        (
            SELECT
                author,
                toStartOfWeek(min(time)) AS start_date
            FROM git.line_changes
            WHERE file_extension IN ('h', 'cpp', 'sql')
            GROUP BY author AS start_dates
        ) AS start_dates
        INNER JOIN
        (
            SELECT
                author,
                countIf(line_type = 'Code') AS code,
                countIf((line_type = 'Comment') OR (line_type = 'Punct')) AS comments,
                comments / (comments + code) AS ratio_code,
                toStartOfWeek(time) AS week
            FROM git.line_changes
            WHERE (file_extension IN ('h', 'cpp', 'sql')) AND (sign = 1)
            GROUP BY
                time,
                author
            HAVING code > 20
            ORDER BY
                author ASC,
                time ASC
        ) AS contributions USING (author)
    )
SELECT
    week_offset,
    avg(ratio_code) AS avg_code_ratio
FROM author_ratios_by_offset
GROUP BY week_offset
HAVING (week_offset % 10) = 0
ORDER BY week_offset ASC
LIMIT 20

┌─week_offset─┬──────avg_code_ratio─┐
│           0 │ 0.21626798253005078 │
│          10 │ 0.18299433892099454 │
│          20 │ 0.22847255749045017 │
│          30 │  0.2037816688365288 │
│          40 │  0.1987063517030308 │
│          50 │ 0.17341406302829748 │
│          60 │  0.1808884776496144 │
│          70 │ 0.18711773536450496 │
│          80 │ 0.18905573684766458 │
│          90 │  0.2505147771581594 │
│         100 │  0.2427673990917429 │
│         110 │ 0.19088569009169926 │
│         120 │ 0.14218574654598348 │
│         130 │ 0.20894252550489317 │
│         140 │ 0.22316626978848397 │
│         150 │  0.1859507592277053 │
│         160 │ 0.22007759757363546 │
│         170 │ 0.20406936638195144 │
│         180 │  0.1412102467834332 │
│         190 │ 0.20677550885049117 │
└─────────────┴─────────────────────┘

20 rows in set. Elapsed: 0.167 sec. Processed 15.07 million rows, 101.74 MB (90.51 million rows/s., 610.98 MB/s.)

WITH
    changes AS
    (
        SELECT
            path,
            commit_hash,
            max_time,
            type,
            num_added,
            num_deleted,
            sum(num_added - num_deleted) OVER (PARTITION BY path ORDER BY max_time ASC) AS current_size,
            if(current_size > 0, num_added / current_size, 0) AS percent_add,
            if(current_size > 0, num_deleted / current_size, 0) AS percent_delete
        FROM
        (
            SELECT
                path,
                max(time) AS max_time,
                commit_hash,
                any(lines_added) AS num_added,
                any(lines_deleted) AS num_deleted,
                any(change_type) AS type
            FROM git.file_changes
            WHERE (change_type IN ('Add', 'Modify')) AND (file_extension IN ('h', 'cpp', 'sql'))
            GROUP BY
                path,
                commit_hash
            ORDER BY
                path ASC,
                max_time ASC
        )
    ),
    rewrites AS
    (
        SELECT
            *,
            any(max_time) OVER (PARTITION BY path ORDER BY max_time ASC ROWS BETWEEN 1 PRECEDING AND CURRENT ROW) AS previous_rewrite,
            dateDiff('day', previous_rewrite, max_time) AS rewrite_days
        FROM changes
        WHERE (type = 'Modify') AND (percent_add >= 0.5) AND (percent_delete >= 0.5) AND (current_size > 50)
    )
SELECT
    avgIf(rewrite_days, rewrite_days > 0) AS avg_rewrite_time,
    quantilesTimingIf(0.5)(rewrite_days, rewrite_days > 0) AS half_life
FROM rewrites