Hi all,
this could be done using the hstore concat operator "||". See [1] section F.16.4. But I don't know if this is anywhat faster than a full reimport.
Greetings, Julian Picht
[1] http://www.postgresql.org/docs/9.1/static/hstore.html
2011/12/18 Kai Krueger kakrueger@gmail.com
On 12/17/2011 03:38 PM, Kay Drangmeister wrote:
Hi all
The parking styles partially fail with the newly imported database.
Am 25.11.2011 09:56, schrieb Kai Krueger:
[...] progress on updating the software stack (The re-import will occur into a postgresql 9.1 database with the latest osm2pgsql) [...]
Maybe it is due to the latest osm2pgsql.
The import is intended to occur with the default set of db columns together with the hstore extensions.
The problem is that not all tags are present in the hstore any more, unlike in the old database. The tags available in other columns are left out in the hstore.
It looks like the following commit to osm2pgsql might have been the issue:
r25689 | giggls | 2011-03-24 09:25:24 -0600 (Thu, 24 Mar 2011) | 9 lines
Minor rework of hstore functionality:
- Do not add a key to the hstore column if there is an exclusive column for
this key by
- Add an additional commandline switch to restore the original behaviour
to add any key
- remove the "z_order" special key from hstore in any case
I did not use the additional commandline switch to move back to the original behaviour.
Coming to think of it, I thought I saw a commit changing the behaviour back again, but I can't find it anymore.
Here is an example for the "amenity" tag missing:
osm_mapnik=> select amenity,tags->'amenity' as "hstore-amenity" from planet_polygon where osm_id=32550266; amenity | hstore-amenity ---------+---------------- parking | (1 row)
here is how it looked before the new import:
osm_mapnik=> select amenity,tags->'amenity' as "hstore-amenity" from planet_polygon where osm_id=32550266;
amenity | hstore-amenity ---------+---------------- parking | parking (1 row)
(If you happen to be a subscriber of mapnik-de there has been the same issue with osm2pgsql, but it has been changed back to the old behaviour. See thread here:
https://lists.openstreetmap.de/mailman/private/mapnik-de/2011-July/000067.ht...
login needed.)
No I am not a subscriber, but why aren't those archives public?!
Of course it is a space advantage not to repeat each tag existing in a regular column in the "tags" hstore again, but on the other side, stylesheets have to be always adapted if the osm2pgsql config file is changed. Plus they will no longer be portable across servers with different osm2pgsql configurations.
OK, so the question is now what to do?
Would it be possible to re-import the hstore?
Does anyone know of an sql query that could be run to pull data from the normal columns and insert it into the hstore?
I'd be somewhat reluctant to do a full re-import of the database.
Kai
Kind regards, Kay
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