*: add session alias field in slowlog, general log and extension framework

[lcwangchao]

What problem does this PR solve?

Issue Number: close #46272, ref #46071

What is changed and how it works?

After set @@tidb_session_alias='alias123' , you can see a field named Session_alias in slow log output:

# Time: 2023-08-21T15:06:02.507248+08:00
# Txn_start_ts: 0
# User@Host: root[root] @ 127.0.0.1 [127.0.0.1]
# Conn_ID: 2097154
# Session_alias: alias123
# Query_time: 1.002047042
# Parse_time: 0.000107792
...

for table information_schema.SLOW_QUERY

TiDB root@127.0.0.1:test> select * from information_schema.SLOW_QUERY where session_alias='alias123'\G
***************************[ 1. row ]***************************
Time                          | 2023-08-21 15:06:02.507248
Txn_start_ts                  | 0
User                          | root
Host                          | 127.0.0.1
Conn_ID                       | 2097154
Session_alias                 | alias123
Exec_retry_count              | 0
Exec_retry_time               | 0.0
...

TiDB root@127.0.0.1:test> admin show slow recent 1;
+-----------------+----------------------------+----------+---------+------+---------+----------------+--------+------+-----------+-----------+----------+------------------------------------------------------------------+---------------+
| SQL             | START                      | DURATION | DETAILS | SUCC | CONN_ID | TRANSACTION_TS | USER   | DB   | TABLE_IDS | INDEX_IDS | INTERNAL | DIGEST                                                           | SESSION_ALIAS |
+-----------------+----------------------------+----------+---------+------+---------+----------------+--------+------+-----------+-----------+----------+------------------------------------------------------------------+---------------+
| select sleep(1) | 2023-08-21 15:06:01.505137 | 0:00:01  |         | 1    | 2097154 | 0              | root@% | test |           |           | 0        | a0adeeb79b71315ac13a77f3f11162106b5ec7b48212cf17c20c754263ab9228 | alias123      |
+-----------------+----------------------------+----------+---------+------+---------+----------------+--------+------+-----------+-----------+----------+------------------------------------------------------------------+---------------+

for general log:

[2023/08/21 15:06:01.505 +08:00] [INFO] [session.go:3957] [GENERAL_LOG] [conn=2097154] [session_alias=alias123] [user=root@127.0.0.1] [schemaVersion=137] [txnStartTS=0] [forUpdateTS=0] [isReadConsistency=false] [currentDB=test] [isPessimistic=false] [sessionTxnMode=PESSIMISTIC] [sql="select sleep(1)"]

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

add session alias field in slowlog, general log and extension framework

[codecov]

Codecov Report

Merging #46273 (9942f44) into master (ab4d6ad) will decrease coverage by 0.9646%.
Report is 26 commits behind head on master.
The diff coverage is 92.8571%.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #46273        +/-   ##
================================================
- Coverage   73.3860%   72.4214%   -0.9646%     
================================================
  Files          1285       1305        +20     
  Lines        394834     402331      +7497     
================================================
+ Hits         289753     291374      +1621     
- Misses        86637      92486      +5849     
- Partials      18444      18471        +27     

Flag	Coverage Δ
integration	25.8561% <15.3846%> (?)
unit	73.3585% <92.8571%> (-0.0276%)	⬇️

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Components	Coverage Δ
dumpling	54.0444% <ø> (ø)
parser	85.0775% <ø> (ø)
br	47.2245% <ø> (-5.0383%)	⬇️

[lcwangchao]

/retest

[bb7133]

LGTM

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-08-23 07:45:03.323875189 +0000 UTC m=+1308267.872891171: ☑️ agreed by bb7133.
• 2023-08-23 08:31:11.796190307 +0000 UTC m=+1311036.345206293: ☑️ agreed by tiancaiamao.

[easonn7]

/approve

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: bb7133, easonn7, tiancaiamao

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• OWNERS [bb7133,tiancaiamao]
• sessionctx/variable/OWNERS [easonn7]

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