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From: Jonathan S. Katz <[email protected]>
To: Erik Rijkers <[email protected]>
To: PostgreSQL Advocacy <[email protected]>
Subject: Re: Feature matrix updates
Date: Mon, 18 Jul 2022 21:32:34 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
	<[email protected]>

On 7/17/22 4:18 PM, Erik Rijkers wrote:
> On 7/17/22 20:34, Jonathan S. Katz wrote:
>> Hi,
>>
>> Please see updates for the feature matrix in advance of the PostgreSQL 
>> 15 release:
>>
>> https://www.postgresql.org/about/featurematrix/
>>
>> In addition to adding information about new features in PostgreSQL 
>> 15[1][2], this version of the feature matrix adds additional  
>> categories including:
>>
>> * Replication
>> * JSON
>> * Transactions and Visibility
>> * VACUUM and Maintenance
>> * Client Applications
> 
> Perhaps add one item for
> 
>    * Indexing & Constraints
> 
> to wit:
> 
> -----
> "Allow unique constraints and indexes to treat NULL values as not 
> distinct (Peter Eisentraut)
> 
> Previously NULL values were always indexed as distinct values, but this 
> can now be changed by creating constraints and indexes using UNIQUE 
> NULLS NOT DISTINCT."
> -----

Agreed, that was an unintended omission. I've added an entry for this.

Thanks!

Jonathan


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