fix: memory leak in database/sql integration

[stepan-romankov]

Change Description

There is a memory leak in postgres/pgxv4/postgres.go:60 func (p *pgDriver) Open(name string) (driver.Conn, error)
This happens because stdlib.RegisterConnConfig() on every connection opening returns new dbURI and stores new instance of pgx.ConnConfig to map indexed by dbURI

Relevant issues:

• Fixes Memory leak in Postgres database/sql integration #161

[google-cla]

Thanks for your pull request! It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

For more information, open the CLA check for this pull request.

[kurtisvg]

Hi @stepan-romankov - Thanks for taking the time to open an issue, identify the cause, and suggest a fix. It's greatly appreciated.

Are you able to sign the CLA? We need to have the CLA signed before we can leave feedback on your PR or accept the change.

[enocom]

Thanks for sending a fix for this!

[stepan-romankov]

Hi @stepan-romankov - Thanks for taking the time to open an issue, identify the cause, and suggest a fix. It's greatly appreciated.

Are you able to sign the CLA? We need to have the CLA signed before we can leave feedback on your PR or accept the change.

Should already be done...

[kurtisvg]

Should already be done...

Unfortunately, I just ran the CLA check and it's still showing up missing. You can follow the instructions in that link to check your status.

[stepan-romankov]

Looks ok now.

[stepan-romankov]

Thanks for sending a fix for this!

I implemented all the requested changes. Please review @enocom.

[enocom]

Two small things. Otherwise LGTM

[stepan-romankov]

@enocom done.

[enocom]

Thanks!