Provide access to column-oriented query results

[cocoa-xu]

Hi, thanks for this great library for ClickHouse!

I was wondering if it's possible to access query results by column? Currently Conn.Query only exposed row-oriented results via Rows. It'd be much more easier to work with other column-major libraries such as arrow if column-oriented results are available.

[jkaflik]

hi @cocoa-xu ch-go fits your needs.

[cocoa-xu]

Thanks @jkaflik! I'll take a look at it.