On Sunday 08 November 2015 16:49:20 you wrote:
> I'm not necessarily objecting to that, but it's not impossible that it
> could break something for some existing user.  We can decide not to
> care about that, though.

We had an idea. You can use ~ to convert the index to the array which always 
starts with 0. Then we can use negative indexes, and you can always find the 
beginning of the array.
we have array [-3:3]={1,2,3,4,5,6,7}
array[~0] == 1
array[~-1] == 7
array[~2:~-2] == {3,4,5,6}

What do you think?
YUriy Zhuravlev
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company

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