Hi Regina,
Thank you so much for the wiki posting. I've been using your code from
your august 12th email with great success, if not joy. What an amazing
speed improvement, especially for such a critical function. This was
your exact email of code I have working: http://postgis.refractions.net/pipermail/postgis-devel/2008-August/003412.html
I've just downloaded the new code off the wiki, but I'm getting an
error of 'Unknown Geometry Type: 0'. I'll paste the whole error below
in case you have an idea what might be going on. I'm running mac 10.5
with these details:
postgis_version
---------------------------------------
1.3 USE_GEOS=1 USE_PROJ=1 USE_STATS=1
(1 row)
--------------------------------------------------------------
PostgreSQL 8.3.3 on i386-apple-darwin9.4.0, compiled by GCC
Cheers,
Dane
-- full error:
test=# select upgis_cascadeunion(the_geom) from npsa group by
wholedrain;
ERROR: Unknown geometry type: 0
CONTEXT: SQL function "upgis_dump_collect_garray" statement 1
SQL statement "SELECT
upgis_dump_collect_garray( array_append(ARRAY(SELECT $1 [s] As geom
FROM generate_series(1, $2 ) As s WHERE NOT (s = ANY( $3 )) ),
st_unite_garray(ARRAY(SELECT $1 [s] As geom FROM generate_series(1,
$2 ) As s WHERE s = ANY( $3 ) ) ) ) )"
PL/pgSQL function "st_collect_unite_garray" line 29 at assignment
SQL statement "SELECT upgis_unitecascade_garray(ARRAY(SELECT
st_collect_unite_garray( $1 [i:least(i + $2 - 1, $3 )]) As geom FROM
generate_series(1, $3 , $2 ) As i), $4 + 1, $5 , false)"
PL/pgSQL function "upgis_unitecascade_garray" line 48 at assignment
SQL statement "SELECT
upgis_dump_collect_garray( array_append(ARRAY(SELECT $1 [ $2 [s]] As
geom FROM generate_series(1, array_upper( $2 ,1)) As s ),
upgis_unitecascade_garray(ARRAY(SELECT $1 [s] As geom FROM
generate_series(1, $3 ) As s WHERE NOT (s = ANY( $2 )) ), $4 + 1,
$5 , true) ) )"
PL/pgSQL function "upgis_unitecascade_garray" line 33 at assignment
SQL function "upgis_unitecascade_garray_sort" statement 1
On Oct 4, 2008, at 4:53 PM, Paragon Corporation wrote:
Oops sorry about that.
Just realized I had ugly spaces in the link. I've changed it. Use
this one
http://postgis.refractions.net/support/wiki/index.php?upgis_cascadeunion
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Paragon
Corporation
Sent: Saturday, October 04, 2008 7:44 PM
To: 'PostGIS Users Discussion'
Subject: [postgis-users] Cascaded Union Aggregate function
For those people who have unions to do that are slow, feel free to
try out
this aggregate union function.
I haven't tested it enough for it to make it into 1.3.4, but have
included a
link to the source code in the wiki. It should work just fine on
PostGIS
versions 1.2.2 and above.
http://postgis.refractions.net/support/wiki/index.php?PL%2FPGSQL%20Pseudo%20
Cascade%20Union%20Aggregate%20Function
Let me know if you run into any problems with it. It has worked
well for
the samples I have used it on.
Thanks,
Regina
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