fix: optimize show open tables xxx statment (#676)

[gufengwyx8]

What this PR does: optimize show open tables xxx statment

Which issue(s) this PR fixes: Fixes #676

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[cr-gpt[bot]]

Seems you are using me but didn't get OPENAI_API_KEY seted in Variables/Secrets for this repo. you could follow readme for more information

[cr-gpt[bot]]

Seems you are using me but didn't get OPENAI_API_KEY seted in Variables/Secrets for this repo. you could follow readme for more information

[sonarcloud[bot]]

Quality Gate passed

The SonarCloud Quality Gate passed, but some issues were introduced.

1 New issue
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov-commenter]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (9b24ed9) 40.20% compared to head (aa7f09e) 40.20%.

Files	Patch %	Lines
pkg/runtime/plan/dal/show_open_tables.go	0.00%	3 Missing :warning:

:exclamation: Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #825 +/- ## ======================================= Coverage 40.20% 40.20% ======================================= Files 265 265 Lines 26708 26708 ======================================= Hits 10738 10738 + Misses 14826 14823 -3 - Partials 1144 1147 +3 ```

:umbrella: View full report in Codecov by Sentry.
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[cr-gpt[bot]]

Seems you are using me but didn't get OPENAI_API_KEY seted in Variables/Secrets for this repo. you could follow readme for more information

[cr-gpt[bot]]

Seems you are using me but didn't get OPENAI_API_KEY seted in Variables/Secrets for this repo. you could follow readme for more information

[sonarcloud[bot]]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[baerwang]

把comment 都resolve下吧 @gufengwyx8