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From Julian Hyde <jh...@apache.org>
Subject Re: Proposal for Skipping Records
Date Mon, 16 Nov 2015 23:07:00 GMT
Fair enough.

Remember that end users don’t (in general) write Java functions and don’t know what exceptions
are. If your intent is to write a specification, you should describe in SQL terms what are
error conditions for the built-in operators.

> On Nov 16, 2015, at 3:01 PM, Sean Hsuan-Yi Chu <hsuanyi@usc.edu> wrote:
> It is defined with respect to the behavior of function evaluation. If a
> function evaluation fails (throwing exceptions), we then considered
> something bad with the input record of this function.
> I agree people might have different beliefs on the definition. However,
> from the aspect of users' experience, they could just proceed and see the
> different types of errors at the log, which helps them judge whether the
> failure is tolerable or not.
> On Mon, Nov 16, 2015 at 11:56 AM, Julian Hyde <jhyde@apache.org> wrote:
>> It would be useful if you could describe the different ways that a record
>> can be “bad”. IIRC the SQL standard divides the conditions into errors and
>> warnings. Examples of a warning would be a string column that is truncated
>> because it is too large for a varchar(20), or numeric underflow when you
>> add 10.00001 to 100000. Examples of errors would be divide-by-zero or
>> inserting a NULL value into a column declared NOT NULL.
>> Maybe Drill has a different set of error and warning conditions than this
>> (but probably not THAT different). But it would be useful to spell them
>> out. And it would be useful to be able to treat “error” and “warning”
>> conditions differently.
>> Julian
>>> On Nov 16, 2015, at 10:45 AM, Sean Hsuan-Yi Chu <hsuanyi@usc.edu> wrote:
>>> Hi all,
>>> We have worked on coming up a design document on this topic, which
>> focuses
>>> on external design. Thanks Neeraja for summarizing a document as below:
>> https://docs.google.com/document/d/1D4mDS-N722MZtkeYGSJbY-wUHG5E8IMT9rIMk1NHHGA/edit
>>> Please help take a look and offer some feedback.

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