On 11/16/2015 08:03 AM, Johannes wrote:
Ccing list
No, i did a mistake while simplifying it.
It should be
FOR i IN SELECT id, level, path_names||'%' as path_names from x LOOP
update x set path_ids[i.level] = i.id where path_names like i.path_names;
So what do you see if you do?:
EXPLAIN ANALYZE select ... your_function(...);
Sorry.
Best regards Johannes
Am 16.11.2015 um 15:10 schrieb Adrian Klaver:
On 11/16/2015 05:56 AM, Johannes wrote:
Dear List,
I have problems with a self written function, which does not use the
index, which takes very long (500 ms per update).
The pl/pgsql function iterates over a select resultset with a cursor.
In every loop I execute an update with a where LIKE condition, which
relates to my current cursor position:
FOR i IN SELECT id, level_ids, path_names||'%' as path_names from x LOOP
update x set path_ids[i.level] = id where path_names like i.path_names;
Is this the actual UPDATE in the function?
If so, where are i.level and id coming from?
Or is that supposed to be?:
update x set path_ids[i.level_ids] = i.id where path_names like
i.path_names;
RAISE NOTICE 'path_names : %', i.path_names;
END LOOP;
Calling the updates outside the function, they are very fast because
like 'a.b%' uses the index of the path field ( ~ 15 ms ).
Does anyone know how to fix that?
Thanks, Johannes
--
Adrian Klaver
adrian.kla...@aklaver.com
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