On 10/17/16 11:29 AM, Tom Lane wrote:
Jim Nasby <jim.na...@bluetreble.com> writes:
On 10/16/16 3:13 PM, Tom Lane wrote:
Related to this I'd also like to add a boolean XOR operator as that's a
relatively common request/question.


We have boolean XOR; it's spelled "<>".

I always forget about that...

Maybe it should be mentioned explicitly in the docs.

Hrm, went to go add it and it appears we don't have a section for boolean type operators. I guess I should add it to 9.1?

though, it doesn't work for boolean arrays.

Define doesn't work?

I would expect array[true, false] XOR array[true, true] to return array[false, true], but <> just returns a single true (since the arrays are !=).

Though, I guess what would make the most sense there is a map function that would apply an operator or function to every element of a set of arrays. But I don't see any way to do that without major changes to how anyarray works.
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Jim Nasby, Data Architect, Blue Treble Consulting, Austin TX
Experts in Analytics, Data Architecture and PostgreSQL
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