fix result when summarize is passed to duckdb

[bbeat2782]

Describe your changes

Now the correct result is displayed when SUMMARIZE is passed to duckdb with sqlalchemy connection

testing_summarize.ipynb.zip

Issue number

Closes #836

Checklist before requesting a review

• Performed a self-review of my code
• Formatted my code with pkgmt format
• Added tests (when necessary).
• Added docstring documentation and update the changelog (when needed)

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📚 Documentation preview 📚: https://jupysql--841.org.readthedocs.build/en/841/

[bbeat2782]

For context,

With sqlalchemy==1.4.49, result of query is stored in LegacyCursorResult. Not sure why, but result stored here remains even after commit().
In sqlalchemy==2.x.x, LegacyCursorResult is removed, and result is stored in CursorResult. In this case, the CursorResult is emptied after commit() : related issue

So as @edublancas suggested here, returning the CursorResult without commit() (like we do with select, with, and from for duckdb) solves the problem.

[edublancas]

please add a note explaining why we're adding "summarize" here

[bbeat2782]

fixed