If I use the value of the hierarchy column in a query I can get all the rows that a given row is an descendant of. (SELECT * FROM items WHERE itm_id IN (1,31,68,97), for example. However, I need the rows to be in the correct order, ie the root node first, child second, grandchild third etc. I'm guessing the order can be set with an ORDER BY, but I've only ever used ORDER BY to order by ascending or descending order of a single column. Is there a way to retrieve the rows explicitly in the order they are listed in the hierarchy array?
If you've got the intarray contrib module installed, you can use idx(array[1,31,68,97], i)
