Hi,
Small thing, but please change example usage code for sql.Out from:
_, err := db.ExecContext(ctx, "ProcName", sql.Named("Arg1", Out{Dest: &outArg}))
to:
_, err := db.ExecContext(ctx, "ProcName", sql.Named("Arg1", sql.Out{Dest: &outArg}))

Line 288 in database/sql/sql.go

What version of Go are you using (go version)?

Go 1.9

Does this issue reproduce with the latest release?

Yes

What operating system and processor architecture are you using (go env)?

linux/amd64 (Windows Subsystem for Linux)

What did you do?

I copied the code in the example usage of the new Out parameter and the compiler complained about unknown type Out

What did you expect to see?

N/A

What did you see instead?

Compile error