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
