How to calculate the area of a large number of polygons in a single query

Hi forum
Is it possible to calculate the area of a large number of polygons in a single query using a combination of SDO_AGGR_UNION and SDO_AREA? So far, I have tried doing something similar to this:
select sdo_geom.sdo_area((
select sdo_aggr_union ( sdoaggrtype(mg.geoloc, 0.005))
from mapv_gravsted_00182 mg
where mg.dblink = 521 or mg.dblink = 94 or mg.dblink = 38 <many many more....>),
0.0005) calc_area from dualThe table MAPV_GRAVSTED_00182 contains 2 fields - geoloc (SDO_GEOMETRY) and dblink (Id field) needed for querying specific polygons.
As far as I can see, I need to first somehow get a single SDO_GEOMETRY object and use this as input for the SDO_AREA function. But I'm not 100% sure, that I'm doing this the right way. This query is very inefficient, and sometimes fails with strange errors like "No more data to read from socket" when executed from SQL Developer. I even tried with the latest JDBC driver from Oracle without much difference.
Would a better approach be to write some kind of stored procedure, that adds up all the single geometries by adding each call to SDO_AREA on each single geometry object - or what is the best approach?
Any advice would be appreciated.
Thanks in advance,
Jacob

Hi
I am now trying to update all my spatial table with SRID's. To do this, I try to drop the spatial index first to recreate it after the update. But for a lot of tables I can't drop the spatial index. Whenever I try to DROP INDEX <spatial index name>, I get this error - anyone know what this means?
Thanks,
Jacob
Error starting at line 2 in command:
drop index BSSYS.STIER_00182_SX
Error report:
SQL Error: ORA-29856: error occurred in the execution of ODCIINDEXDROP routine
ORA-13249: Error in Spatial index: cannot drop sequence BSSYS.MDRS_1424B$
ORA-13249: Stmt-Execute Failure: DROP SEQUENCE BSSYS.MDRS_1424B$
ORA-29400: data cartridge error
ORA-02289: sequence does not exist
ORA-06512: at "MDSYS.SDO_INDEX_METHOD_10I", line 27
29856. 00000 - "error occurred in the execution of ODCIINDEXDROP routine"
*Cause: Failed to successfully execute the ODCIIndexDrop routine.
*Action: Check to see if the routine has been coded correctly.
Edit - just found the answer for this in MetaLink note 241003.1. Apparently there is some internal problem when dropping spatial indexes, some objects gets dropped that shouldn't be. Solution is to manually create the sequence it complains it can't drop, then it works... Weird error.

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Environment:
Oracle 11.2.0.3 EE on Solaris 10.5
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Here are the CREATE TABLE and INSERT statements for some sample data:
create table sales(custno number, tran_dt date, amount number)Here are the INSERTs to load:
INSERT INTO SALES(custno, tran_dt, amount) VALUES (5, TO_DATE('23-MAR-12','DD-MON-RRRR'),3065);
INSERT INTO SALES(custno, tran_dt, amount) VALUES (5, TO_DATE('29-FEB-12','DD-MON-RRRR'),8435);
INSERT INTO SALES(custno, tran_dt, amount) VALUES (5, TO_DATE('29-FEB-12','DD-MON-RRRR'),9712);
INSERT INTO SALES(custno, tran_dt, amount) VALUES (5, TO_DATE('20-MAR-12','DD-MON-RRRR'),1869);
INSERT INTO SALES(custno, tran_dt, amount) VALUES (5, TO_DATE('03-AUG-12','DD-MON-RRRR'),647);
INSERT INTO SALES(custno, tran_dt, amount) VALUES (5, TO_DATE('03-MAR-12','DD-MON-RRRR'),7434);
INSERT INTO SALES(custno, tran_dt, amount) VALUES (5, TO_DATE('23-AUG-12','DD-MON-RRRR'),225);
INSERT INTO SALES(custno, tran_dt, amount) VALUES (5, TO_DATE('01-SEP-12','DD-MON-RRRR'),28);
INSERT INTO SALES(custno, tran_dt, amount) VALUES (5, TO_DATE('10-APR-12','DD-MON-RRRR'),9393);
INSERT INTO SALES(custno, tran_dt, amount) VALUES (26, TO_DATE('19-MAY-12','DD-MON-RRRR'),1010);
INSERT INTO SALES(custno, tran_dt, amount) VALUES (26, TO_DATE('29-FEB-12','DD-MON-RRRR'),2625);
INSERT INTO SALES(custno, tran_dt, amount) VALUES (26, TO_DATE('18-MAR-12','DD-MON-RRRR'),2511);
INSERT INTO SALES(custno, tran_dt, amount) VALUES (26, TO_DATE('15-AUG-12','DD-MON-RRRR'),1156);
INSERT INTO SALES(custno, tran_dt, amount) VALUES (26, TO_DATE('17-AUG-12','DD-MON-RRRR'),5106);
INSERT INTO SALES(custno, tran_dt, amount) VALUES (26, TO_DATE('19-AUG-12','DD-MON-RRRR'),714);
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INSERT INTO SALES(custno, tran_dt, amount) VALUES (26, TO_DATE('14-MAY-12','DD-MON-RRRR'),1880);
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INSERT INTO SALES(custno, tran_dt, amount) VALUES (26, TO_DATE('04-SEP-12','DD-MON-RRRR'),8277);
INSERT INTO SALES(custno, tran_dt, amount) VALUES (26, TO_DATE('20-MAR-12','DD-MON-RRRR'),3929);
INSERT INTO SALES(custno, tran_dt, amount) VALUES (26, TO_DATE('04-MAR-12','DD-MON-RRRR'),9239);
INSERT INTO SALES(custno, tran_dt, amount) VALUES (26, TO_DATE('24-APR-12','DD-MON-RRRR'),4390);
INSERT INTO SALES(custno, tran_dt, amount) VALUES (26, TO_DATE('12-MAY-12','DD-MON-RRRR'),8362);
INSERT INTO SALES(custno, tran_dt, amount) VALUES (26, TO_DATE('06-APR-12','DD-MON-RRRR'),4157);
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INSERT INTO SALES(custno, tran_dt, amount) VALUES (26, TO_DATE('31-MAR-12','DD-MON-RRRR'),8017);
INSERT INTO SALES(custno, tran_dt, amount) VALUES (26, TO_DATE('20-MAY-12','DD-MON-RRRR'),2420);
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INSERT INTO SALES(custno, tran_dt, amount) VALUES (26, TO_DATE('23-AUG-12','DD-MON-RRRR'),313);
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from sales
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If it's easier to use a lower percentile I can use the examples to plug in the 99.
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         5 4506.11111 28.1111111 4142.61146 12427.8344
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Thanks very much for the assistance!!
-gary
Edited by: garywicke on Sep 5, 2012 9:54 AM

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http://oracleitalia.wordpress.com
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Bilinear_Model.jpg ‏33 KB

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This account is no longer active. Contact ShadesOfGray for current posts and information.

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[svn:fx-trunk] 10545: Make DataGrid smarter about when and how to calculate the modulefactory for its renderers when using embedded fonts

Revision: 10545
Author:   [email protected]
Date:     2009-09-23 13:33:21 -0700 (Wed, 23 Sep 2009)
Log Message:
Make DataGrid smarter about when and how to calculate the modulefactory for its renderers when using embedded fonts
QE Notes: 2 Mustella tests fail:
components/DataGrid/DataGrid_HaloSkin/Properties/datagrid_properties_columns_halo datagrid_properties_columns_increase0to1_halo
components/DataGrid/DataGrid_SparkSkin/Properties/datagrid_properties_columns datagrid_properties_columns_increase0to1
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Doc Notes: None
Bugs: SDK-15241
Reviewer: Darrell
API Change: No
Is noteworthy for integration: No
tests: checkintests mustella/browser/DataGrid
Ticket Links:
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Modified Paths:
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    flex/sdk/trunk/frameworks/projects/framework/src/mx/controls/dataGridClasses/DataGridBase .as
    flex/sdk/trunk/frameworks/projects/framework/src/mx/controls/dataGridClasses/DataGridColu mn.as

Hi Matthias,
Sorry, if this reply seems like a products plug (which it is), but this is really how we solve this software engineering challenge at JKI...
At JKI, we create VI Packages (which are basically installers for LabVIEW instrument drivers and toolkits) of our reusable code (using the package building capabilities of VIPM Professional). We keep a VI Package Configuration file (that includes a copy of the actual packages) in each of our project folders (and check it into source code control just as we do for all our project files). We also use VIPM Enterprise to distribute new VI Packages over the network.
Also, as others have mentioned, we use the JKI TortoiseSVN Tool to make it easy to use TortoiseSVN directly from LabVIEW.
Please feel free to contact JKI if you have any specific questions about these products.
Thanks,
-Jim

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