Try it: select * from comments where article_id = 2 order by string_to_array(path::text,'.')::integer[];
2011/7/21 Ivan Polak <ivan.po...@f4s.sk> > Hi, thank you for your answer, please can You send me complete select > command how to convert ltree column to integer[] and use it to order > by. > > thanks > > Ivan > > 2011/7/21 pasman pasmański <pasma...@gmail.com>: > > Hi. > > > > You should convert path to integer[]. > > > > 2011/7/20, Ivan Polak <ivan.po...@f4s.sk>: > >> Hi, > >> > >> in postgreSQL (with LTREE extension) database I have the following > >> table "comments": > >> > >> id BIGINT /* id */ > >> article_id BIGINT /*article-id */ > >> parent_id BIGINT > >> comment TEXT > >> path LTREE > >> level INTEGER /* level */ > >> > >> with the following rows: > >> > >> id article_id comment parent_id path level > >> 1 1 aaaa 1 1 > >> 2 1 bbbb 1 1.2 2 > >> 3 1 cccc 2 1.2.3 3 > >> 4 1 dddd 2 1.4 2 > >> 5 1 eeee 4 1.4.5 3 > >> 6 1 ffff 6 1 > >> 7 1 gggg 6 6.7 2 > >> 8 1 hhhh 6 6.8 2 > >> 9 1 iiii 9 1 > >> 10 1 jjjj 10 1 > >> 11 1 kkkk 5 1.4.5.11 4 > >> > >> and I need to select complete tree (with correct order of comments). > >> > >> SELECT * from comments where article_id = 2 order by <???> > >> > >> when I used: > >> > >> SELECT * from comments where article_id = 2 order by path > >> > >> the result is: > >> > >> id comment path > >> 1 aaaa 1 > >> 2 bbbb 1.2 > >> 3 cccc 1.2.3 > >> 4 dddd 1.4 > >> 5 eeee 1.4.5 > >> 11 kkkk 1.4.5.11 > >> 10 jjjj 10 > >> 6 ffff 6 > >> 7 gggg 6.7 > >> 8 hhhh 6.8 > >> 9 iiii 9 > >> > >> BUT, it is wrong, because comment with id = 10 is after comment with > id=11 > >> > >> (i know, this is correct, because ordering by column PATH [as TEXT], > >> and 10 is 'after' 1.4.5.11) > >> > >> , but I need : > >> > >> id comment path > >> 1 aaaa 1 > >> 2 bbbb 1.2 > >> 3 cccc 1.2.3 > >> 4 dddd 1.4 > >> 5 eeee 1.4.5 > >> 11 kkkk 1.4.5.11 > >> 6 ffff 6 > >> 7 gggg 6.7 > >> 8 hhhh 6.8 > >> 9 iiii 9 > >> 10 jjjj 10 > >> > >> thanks > >> > >> Ivan > >> > >> -- > >> Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) > >> To make changes to your subscription: > >> http://www.postgresql.org/mailpref/pgsql-sql > >> > > > > > > -- > > ------------ > > pasman > > > > -- > > Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) > > To make changes to your subscription: > > http://www.postgresql.org/mailpref/pgsql-sql > > > > -- > Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-sql > >
