Обсуждение: [GENERAL] Nullsif ? PG 9.1

Hi guys,

I've got this select:

 SELECT split_part(n.node_full_path::text, '/'::text, 8)::integer AS id,

However, not always I will get the 8th field, and because of that, i may get no data somethings.

Example:

/filesuser/client/27801123/attachment/4510/main

/filesuser/client/1111/attachment/21314134/file/12312312312/small/photo.jpg

Note that, sometimes it only goes until the 7th splitted_part, not always i will get the 8th.

How can I tell the select, if no 8th field is found, then returns null?

Thanks!
Patrick