Support for creating functional indexes in PostgreSQL and MySQL

[yuly3]

PR Info

• Closes Postgres: Support creating functional indexes #756

New Features

• Support for creating functional indexes in PostgreSQL and MySQL

Breaking Changes

• Change public Struct index::common::IndexColumn to Enum

References

• PostgreSQL 17: https://www.postgresql.org/docs/17/indexes-expressional.html
• MySQL 8.4: https://dev.mysql.com/doc/refman/8.4/en/create-index.html

Notes

I'm not entirely confident that this implementation is appropriate.
If you have any suggestions for a better implementation, I would greatly appreciate your feedback.

[tyt2y3]

thank you. looks good at first glance. I need more time to read it again

[tyt2y3]

thank you

[github-actions]

🎉 Released In 0.32.5 🎉

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