add Mysql support

[jychen7]

verify locally with cargo run --features=mysql

example config

[[execution.database.mysql]]
name="mysql"
database="development"

please refer to https://github.com/datafusion-contrib/datafusion-table-providers?tab=readme-ov-file#mysql for local mysql setup

[jychen7]

@matthewmturner, what do you think about this feature?

I will resolve conflict tomorrow.

[matthewmturner]

Looks like datafusion-table-providers needs to update to DF v45. Would you be able to make that change first and see when they plan on doing release? I am trying to align all my DF related dependencies on v45 for the next release.

[jychen7]

yes, this PR is using a temp branch jychen7/datafusion-table-providers#1, combining datafusion-contrib/datafusion-table-providers#249 and datafusion-contrib/datafusion-table-providers#247.

I agree we should wait those two PRs merged, that's why this is a draft. I will post in Slack or Discord and ask if maintainer have time to help review.

[jychen7]

thread: https://discord.com/channels/885562378132000778/1206315256977035394/1348640250922143857

[matthewmturner]

I'm not that familiar with MySql but im surprised the default database is an empty string - is that correct?

[jychen7]

actually, we should remove default. MySQL does not have default database for applications and when using mysql client, we need to say use {database};

[matthewmturner]

@matthewmturner, what do you think about this feature?

I will resolve conflict tomorrow.

I love this! I left a couple comments. One thing in particular that is missing is a test for the extension. Would you be able to add a test by following the same pattern that we already have setup for testing extensions?

Specifically by adding a MySql test here and here

[jychen7]

Would you be able to add a test by following the same pattern that we already have setup for testing extensions?

sounds good