系统表 - 图1备注

自 Doris 1.2 版本起支持 rowset

描述

rowsets 是 Doris 内置的一张系统表，存放在information_schema数据库下。通过 rowsets 系统表可以查看各个BE 当前 rowsets 情况。

rowsets 表结构为：

  1. MySQL [(none)]> desc information_schema.rowsets;
  2. +------------------------+------------+------+-------+---------+-------+
  3. | Field                  | Type       | Null | Key   | Default | Extra |
  4. +------------------------+------------+------+-------+---------+-------+
  5. | BACKEND_ID             | BIGINT     | Yes  | false | NULL    |       |
  6. | ROWSET_ID              | VARCHAR(*) | Yes  | false | NULL    |       |
  7. | TABLET_ID              | BIGINT     | Yes  | false | NULL    |       |
  8. | ROWSET_NUM_ROWS        | BIGINT     | Yes  | false | NULL    |       |
  9. | TXN_ID                 | BIGINT     | Yes  | false | NULL    |       |
  10. | NUM_SEGMENTS           | BIGINT     | Yes  | false | NULL    |       |
  11. | START_VERSION          | BIGINT     | Yes  | false | NULL    |       |
  12. | END_VERSION            | BIGINT     | Yes  | false | NULL    |       |
  13. | INDEX_DISK_SIZE        | BIGINT     | Yes  | false | NULL    |       |
  14. | DATA_DISK_SIZE         | BIGINT     | Yes  | false | NULL    |       |
  15. | CREATION_TIME          | BIGINT     | Yes  | false | NULL    |       |
  16. | NEWEST_WRITE_TIMESTAMP | BIGINT     | Yes  | false | NULL    |       |
  17. +------------------------+------------+------+-------+---------+-------+

Example

  1. select * from information_schema.rowsets where BACKEND_ID = 10004 limit 10;
  2. +------------+--------------------------------------------------+-----------+-----------------+--------+--------------+---------------+-------------+-----------------+----------------+---------------+------------------------+------------------------+
  3. | BACKEND_ID | ROWSET_ID                                        | TABLET_ID | ROWSET_NUM_ROWS | TXN_ID | NUM_SEGMENTS | START_VERSION | END_VERSION | INDEX_DISK_SIZE | DATA_DISK_SIZE | CREATION_TIME | OLDEST_WRITE_TIMESTAMP | NEWEST_WRITE_TIMESTAMP |
  4. +------------+--------------------------------------------------+-----------+-----------------+--------+--------------+---------------+-------------+-----------------+----------------+---------------+------------------------+------------------------+
  5. |      10004 | 02000000000000994847fbd41a42297d7c7a57d3bcb46f8c |     10771 |           66850 |      6 |            1 |             3 |           3 |            2894 |         688855 |    1659964582 |             1659964581 |             1659964581 |
  6. |      10004 | 020000000000008d4847fbd41a42297d7c7a57d3bcb46f8c |     10771 |           66850 |      2 |            1 |             2 |           2 |            2894 |         688855 |    1659964575 |             1659964574 |             1659964574 |
  7. |      10004 | 02000000000000894847fbd41a42297d7c7a57d3bcb46f8c |     10771 |               0 |      0 |            0 |             0 |           1 |               0 |              0 |    1659964567 |             1659964567 |             1659964567 |
  8. |      10004 | 020000000000009a4847fbd41a42297d7c7a57d3bcb46f8c |     10773 |           66639 |      6 |            1 |             3 |           3 |            2897 |         686828 |    1659964582 |             1659964581 |             1659964581 |
  9. |      10004 | 020000000000008e4847fbd41a42297d7c7a57d3bcb46f8c |     10773 |           66639 |      2 |            1 |             2 |           2 |            2897 |         686828 |    1659964575 |             1659964574 |             1659964574 |
  10. |      10004 | 02000000000000884847fbd41a42297d7c7a57d3bcb46f8c |     10773 |               0 |      0 |            0 |             0 |           1 |               0 |              0 |    1659964567 |             1659964567 |             1659964567 |
  11. |      10004 | 02000000000000984847fbd41a42297d7c7a57d3bcb46f8c |     10757 |           66413 |      6 |            1 |             3 |           3 |            2893 |         685381 |    1659964582 |             1659964581 |             1659964581 |
  12. |      10004 | 020000000000008c4847fbd41a42297d7c7a57d3bcb46f8c |     10757 |           66413 |      2 |            1 |             2 |           2 |            2893 |         685381 |    1659964575 |             1659964574 |             1659964574 |
  13. |      10004 | 02000000000000874847fbd41a42297d7c7a57d3bcb46f8c |     10757 |               0 |      0 |            0 |             0 |           1 |               0 |              0 |    1659964567 |             1659964567 |             1659964567 |
  14. |      10004 | 020000000000009c4847fbd41a42297d7c7a57d3bcb46f8c |     10739 |            1698 |      8 |            1 |             3 |           3 |             454 |          86126 |    1659964582 |             1659964582 |             1659964582 |
  15. +------------+--------------------------------------------------+-----------+-----------------+--------+--------------+---------------+-------------+-----------------+----------------+---------------+------------------------+------------------------+

KeyWords

rowsets, information_schema