topsql: remove redundant attach sql information

[crazycs520]

Signed-off-by: crazycs520 crazycs520@gmail.com

What problem does this PR solve?

Issue Number: close #33805

What is changed and how it works?

Remove redundant attach sql information operation.

Sysbench Point-Get Test

Topology

machine: AWS c4.4xlarge, 16 cpu core, 32G memory.

+------+--------------------+-------------+------------------------------------------+
| TYPE | INSTANCE           | VERSION     | GIT_HASH                                 |
+------+--------------------+-------------+------------------------------------------+
| tidb | 172.31.9.146:4000  | 6.1.0-alpha | b8d65ce20b4721c7dff7c6d90dc2db9f7582be30 |
| pd   | 172.31.9.146:2379  | 6.1.0-alpha | 8eb3bbed0584ee435be27b9f0743d640aec35d12 |
| tikv | 172.31.9.146:20160 | 6.0.0-alpha | 0cfc9afaff465f5cc3f50f9bb245694c5c1aaf4e |
+------+--------------------+-------------+------------------------------------------+

Before this PR

Threads	QPS(k) with TopSQL	QPS(k) Without TopSQL	QPS Impact (%)
50	28775	30778	6.50789525
300	34556	37304	7.366502252

This PR

Threads	QPS(k) with TopSQL	QPS(k) Without TopSQL	QPS Impact (%)
50	29107	30867	5.701882269
300	35022	37401	6.360792492

Release note

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

None

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• breeswish
• zhongzc

To complete the pull request process, please ask the reviewers in the list to review by filling /cc @reviewer in the comment.
After your PR has acquired the required number of LGTMs, you can assign this pull request to the committer in the list by filling /assign @committer in the comment to help you merge this pull request.

The full list of commands accepted by this bot can be found here.

Reviewer can indicate their review by submitting an approval review.
Reviewer can cancel approval by submitting a request changes review.

[crazycs520]

/run-all-tests

[crazycs520]

/run-all-tests

[sre-bot]

Code Coverage Details: https://codecov.io/github/pingcap/tidb/commit/ef5925104f293e063fb50281bda26f9a40bbfc57

[zhongzc]

Does it make any difference to the topsql graph?

[crazycs520]

Does it make any difference to the topsql graph?

It doesn't affect the TopSQL feature.

[crazycs520]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: ef59251

[crazycs520]

/merge