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From Ted Dunning <ted.dunn...@gmail.com>
Subject Re: [PROPOSAL] Optiq
Date Thu, 01 May 2014 22:44:07 GMT
On Thu, May 1, 2014 at 10:19 PM, Kasper Sørensen <
kasper.sorensen@humaninference.com> wrote:

> - Can you explain or link to more information about the type inference you
> mention?
>

The type inferencing is used by Drill.

The problem is that strong typing is normally required to parse SQL
statements.  If you don't even yet know what columns exist, parsing a query
is difficult for normal SQL parsers. Generating good code for such
situations has to be delayed until type information is available.

See

http://tnachen.wordpress.com/2013/11/05/lifetime-of-a-query-in-drill-alpha-release/

https://docs.google.com/document/d/1QTL8warUYS2KjldQrGUse7zp8eA72VKtLOHwfXy6c7I/edit

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