Обсуждение: array_agg-like thing over arrays
Hi all, I could swear I remember being able to do this in the past, but it doesn't seem I can remember how, and I have been unable to find anything in The Fine Materials. I want to produce the output of rows of arrays as an aggregated array: create table eg1 (class_id int, item_id int8, arrayofstuff text[]); SELECT item_id, array_agg(arrayofstuff) from eg1 WHERE class_id = 1; But this, of course, gives an ERROR: could not find array type for data type text[]. What am I missing, or have I just misremembered that this was ever possible? Thanks, A -- Andrew Sullivan ajs@crankycanuck.ca
Hey Andrew,
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// Dmitriy.
2011/1/15 Andrew Sullivan <ajs@crankycanuck.ca>
Hi all,
I could swear I remember being able to do this in the past, but it
doesn't seem I can remember how, and I have been unable to find
anything in The Fine Materials.
I want to produce the output of rows of arrays as an aggregated array:
create table eg1 (class_id int, item_id int8, arrayofstuff text[]);
SELECT item_id, array_agg(arrayofstuff) from eg1 WHERE class_id = 1;
Try SELECT item_id, array_agg(arrayofstuff::text) from eg1 WHERE class_id = 1;
But this, of course, gives an ERROR: could not find array type for data type text[].
What am I missing, or have I just misremembered that this was ever
possible?
Thanks,
A
--
Andrew Sullivan
ajs@crankycanuck.ca
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// Dmitriy.
On Sat, Jan 15, 2011 at 01:35:20AM +0300, Dmitriy Igrishin wrote: > Try SELECT item_id, array_agg(arrayofstuff::text) from eg1 WHERE class_id = > 1; Doh! That's it. Thanks! A -- Andrew Sullivan ajs@crankycanuck.ca