[gdal-dev] append mode in postgresql

[Even Rouault]

Selon "Yves Jacolin (Free)" <yjacolin at free.fr>:

> thanks Even. All information is in the pg_driver page. I really need to read
> it more carefully :(
>
> There is just a very small issue, the doc said about SCHEMA:
> "Use the -nln option of ogr2ogr instead, or better the active_schema "
>
> But there is no example about SCHEMA :/

This was actually moved in the http://gdal.org/ogr/drv_pg_advanced.html , that
can be accessed from the "Advanced OGR PostgreSQL driver Information" link at
the end of the main doc page of the PG driver.

>
> Y.
> Le mercredi 6 mars 2013 16:42:09 Even Rouault a écrit :
> > Selon "Yves Jacolin (Free)" <yjacolin at free.fr>:
> > > Le mercredi 6 mars 2013 15:38:11 Yves Jacolin a écrit :
> > > > Hello,
> > > >
> > > > I am trying to import EDIGEO files in append mode. The doc said to use
> > > > -append flag with ogr2ogr commande.
> > > >
> > > > ogr2ogr -gt 65536 -f "PostgreSQL" "PG:dbname=test_edigeo
> > > > host='localhost'"
> > > > - lco "GEOMETRY_NAME=the_geom" -lco "SCHEMA=test" -lco "OVERWRITE=YES"
> > > > -nln
> > > > EDIGEO_parcelle  E0001.THF PARCELLE_id
> > > >
> > > > => ok
> > > >
> > > > ogr2ogr -append -update -gt 65536 -f "PostgreSQL"
> "PG:dbname=test_edigeo
> > > > host='localhost'" -lco "GEOMETRY_NAME=the_geom" -lco "SCHEMA=test" -nln
> > > > EDIGEO_parcelle  E0002.THF PARCELLE_id
> > > >
> > > > => nok I get this error message:
> > > >
> > > > ERROR 1: Layer test.edigeo_parcelle already exists, CreateLayer failed.
> > > > Use the layer creation option OVERWRITE=YES to replace it.
> > > > ERROR 1: Terminating translation prematurely after failed
> > > > translation of layer PARCELLE_id (use -skipfailures to skip errors)
> >
> > You cannot use -lco (layer *creation* option) for an append/update. Well,
> > you can, but they will be ignored. As such, the schema that will be used
> > will be the public schema (since -lco SCHEMA=test is ignored). In your
> > update ogr2ogr command line, you have to specify either "-nln
> > test.PARCELLE_id" or add " active_schema=test" to your connexion string,
> > i.e. "PG:dbname=test_edigeo host='localhost' active_schema=test" (you could
> > also have used active_schema for the first ogr2ogr command that will create
> > the table)
> >
> > > > Y.
> > >
> > > Here some information about my issue:
> > >
> > > 1/ ogr2ogr is not protecting layer name. If I use EDIGEO_parcelle as a
> > > layername, Postgresql will create "edigeo_parcelle" table which is
> > > incorrect (even if this is not a good practice to set up an uppercase
> > > table name).
> > This is the effect of the "laundering" that is done by default. See the
> > LAUNDER layer creation option documented in http://gdal.org/ogr/drv_pg.html
> > > 2/ In SQL request sent by ogr2ogr I find this one:
> > > SELECT a.attname, a.attnum, t.typname, t.typname =
> > > ANY(ARRAY['int2','int4','serial']) AS isfid FROM pg_class c, pg_attribute
> > > a, pg_type t, pg_namespace n, pg_index i WHERE a.attnum > 0 AND
> > > a.attrelid = c.oid AND a.atttypid = t.oid AND c.relnamespace = n.oid AND
> > > c.oid = i.indrelid
> > > AND i.indisprimary = 't' AND t.typname !~ '^geom' AND c.relname =
> > > 'edigeo_parcelle' AND (i.indkey[0]=a.attnum OR i.indkey[1]=a.attnum OR
> > > i.indkey[2]=a.attnum OR i.indkey[3]=a.attnum OR i.indkey[4]=a.attnum OR
> > > i.indkey[5]=a.attnum OR i.indkey[6]=a.attnum OR i.indkey[7]=a.attnum OR
> > > i.indkey[8]=a.attnum OR i.indkey[9]=a.attnum) AND n.nspname='public'
> ORDER
> > > BY a.attnum;
> >
> > > But my layer should be in "test" schema. Correct SQL request should be:
> > See above explanation about active_schema.
>