postgres: switch from lib/pq to jackc/pgx

[craigpastro]

👋 Hi there! Closes #339.

It was quite a bit simpler than I imagined, so I hope it is done correctly. Please let me know if you have any suggestions.

Thanks!

[mfridman]

Great, only one change for the CLI in cmd/goose/main.go below line 95.

Need to special case postgres and use pgx as the driver name.

if driver == "postgres" {
	driver = "pgx"
}

Example:

goose/cmd/goose/main.go

Lines 93 to 95 in 1311a0e

	if driver == "sqlite3" {
	driver = "sqlite"
	}

CLI consumers are likely using GOOSE_DRIVER=postgres, so we avoid breaking them. It's an implementation detail that we use pgx.

[craigpastro]

Ah, that's a great point. Sorry I missed that.

Updated to add the if statement, and rearranged the comment. A switch statement could also be nice there. It sort of ensures that the comment applies to the statement. WDYT?

[mfridman]

Ah, that's a great point. Sorry I missed that.

Updated to add the if statement, and rearranged the comment. A switch statement could also be nice there. It sort of ensures that the comment applies to the statement. WDYT?

Ye no worries. Switch statement sounds good to me.

[mfridman]

Thanks for your contribution 🎉

[craigpastro]

It's my pleasure! Thanks for the help.