Re: array_cat without duplicity

On Wed, 19 Mar 2008, Ondřej Fafejta <ondrej(dot)fafejta(at)kyberie(dot)cz> writes:
> SELECT array_cat(ARRAY[1,2], ARRAY[2,3]);
> array_cat
> -----------
> {1,2,2,3}
>
> I need to get result without duplicity!
> {1,2,3}

I don't know any builtin way of achieving such a thing. But you may want
to use intarray contrib module or implement your own PL function to
remove duplicates from an array.

Regards.