executor: support show table partition regions

[crazycs520]

Signed-off-by: crazycs520 [email protected]

What problem does this PR solve?

related parser PR pingcap/parser#855

As the title said, here is an example:

mysql>show table t partition (p4) regions;
+-----------+----------------+----------------+-----------+-----------------+-------+------------+---------------+------------+----------------------+------------------+
| REGION_ID | START_KEY      | END_KEY        | LEADER_ID | LEADER_STORE_ID | PEERS | SCATTERING | WRITTEN_BYTES | READ_BYTES | APPROXIMATE_SIZE(MB) | APPROXIMATE_KEYS |
+-----------+----------------+----------------+-----------+-----------------+-------+------------+---------------+------------+----------------------+------------------+
| 1047      | t_154_r        | t_154_r_200000 | 1048      | 1               | 1048  | 0          | 0             | 0          | 1                    | 1                |
| 1049      | t_154_r_200000 | t_154_r_400000 | 1050      | 1               | 1050  | 0          | 0             | 0          | 1                    | 0                |
| 1051      | t_154_r_400000 | t_154_r_600000 | 1052      | 1               | 1052  | 0          | 0             | 0          | 1                    | 0                |
| 1053      | t_154_r_600000 | t_154_r_800000 | 1054      | 1               | 1054  | 0          | 0             | 0          | 1                    | 0                |
| 2         | t_154_r_800000 |                | 3         | 1               | 3     | 0          | 747           | 0          | 1                    | 0                |
| 1045      | t_154_         | t_154_r        | 1046      | 1               | 1046  | 0          | 0             | 0          | 1                    | 1                |
+-----------+----------------+----------------+-----------+-----------------+-------+------------+---------------+------------+----------------------+------------------+
6 rows in set
Time: 0.009s
mysql>show table t partition (p3) regions;
+-----------+-----------+---------+-----------+-----------------+-------+------------+---------------+------------+----------------------+------------------+
| REGION_ID | START_KEY | END_KEY | LEADER_ID | LEADER_STORE_ID | PEERS | SCATTERING | WRITTEN_BYTES | READ_BYTES | APPROXIMATE_SIZE(MB) | APPROXIMATE_KEYS |
+-----------+-----------+---------+-----------+-----------------+-------+------------+---------------+------------+----------------------+------------------+
| 1041      | t_153_    | t_154_  | 1042      | 1               | 1042  | 0          | 0             | 0          | 1                    | 0                |
+-----------+-----------+---------+-----------+-----------------+-------+------------+---------------+------------+----------------------+------------------+
1 row in set

What is changed and how it works?

Related changes

• Need to cherry-pick to the release branch

Check List

Tests

• Unit test

Side effects

Release note

• support show table partition regions.

[tangenta]

LGTM

[crazycs520]

/run-all-tests

[crazycs520]

/run-all-tests

[djshow832]

LGTM

[tiancaiamao]

LGTM

[tiancaiamao]

/merge

[sre-bot]

/run-all-tests

[sre-bot]

@crazycs520 merge failed.

[codecov]

Codecov Report

Merging #17229 into master will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff             @@
##             master     #17229   +/-   ##
===========================================
  Coverage   79.8557%   79.8557%           
===========================================
  Files           517        517           
  Lines        139881     139881           
===========================================
  Hits         111703     111703           
  Misses        19209      19209           
  Partials       8969       8969           

[crazycs520]

/run-cherry-picker

[sre-bot]

cherry pick to release-4.0 in PR #17294