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From Mike Carey <>
Subject Re: Issue status for indexing open data? (@Ildar?)
Date Sun, 09 Aug 2015 07:54:24 GMT
Q:  Is the nullability info drawn from the index entry really used?  Can 
you give an example of where/how? (Wondering if it's perhaps removable.)

On 8/7/15 2:39 PM, Ildar Absalyamov wrote:
> So it turned out I was wrong about about open indexes & nullable types. Is
> is indeed not allowed that, is you look closely on parser's production rules
> The problem appears when we're trying to create an ordinary index on
> nullable field. The information about the field type is persisted in the
> index metadata entry. In the open case the type is provided by the user,
> whereas in the closed the type is extracted from the record's metadata
> entry (where we do have a nullability attribute). We can replicate the
> nullablility attribute in the index metadata entry as well, but I think
> that is against the Till's original comment since this information is
> becoming spread around several places. Other solution would be to carry "if
> (open) {} else if (closed) {}" logic throughout the code, where we do need
> nullability information, but that will be ugly.
> 2015-08-07 11:18 GMT-07:00 Michael Carey <>:
>> Q: (@Ildar) - What's the status of removing "?" from the open index DDL
>> and reverting that (unnecessary) part of the metadata patch?

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