From: | "Thomas T(dot) Thai" <tom(at)minnesota(dot)com> |
---|---|
To: | PostgreSQL General <pgsql-general(at)postgresql(dot)org> |
Subject: | concat for pgsql? |
Date: | 2001-01-26 17:57:55 |
Message-ID: | Pine.NEB.4.21.0101261151110.2450-100000@ns01.minnesota.com |
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Lists: | pgsql-general |
i'm still porting my app from mysql to pgsql. i'm stuck on this one. in my
mysql app where i have a tree structure defined as:
01
0101
0102
...
ZZ01
ZZ02
ZZ0301
...etc
it's basically base 36
when i would move a node in the tree, i would do something like this in
mysql:
UPDATE tbl SET code =
CONCAT('NEWPREFIX',SUBSTRING(code,LENGTH('parent_code'))) WHERE \
code LIKE 'parent_code%';
so if i moved all the nodes under 01010201 to AA, it would UPDATE all the
paths starting with 01010201 with AA using CONCAT. i can't seem to find a
similar function in pgsql. ofcourse i could pull the results into an array
in php and loop through it to make the changes, and UPDATE them
individually back to pgsql, but that's a very slow process.
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