How to process 'Sequencial Vertices to Polygon'

Question

Hi~
I made a table of sequencial vertices from polygon using by 'SDO_UTIL.GETNUMVERTICES'.
The table has following four columns,
*"original primarykey, coord. of X, coord. of Y, ID(sequence)"*.
PK     X     Y ID
11847404     193952.2429     432465.9997     1
11847404     193942.4635     432459.81      2
11847404     193941.1902     432461.8218     3
11847404     193919.1535     432447.8742     4
11847404     193905.9558     432439.521     5
11847404     193907.2291     432437.5093     6
11847404     193898.0412     432431.694     7
11847404     193919.1577     432398.3308     8
11847404     193946.2585     432415.4836     9
11847404     193973.3593     432432.6365     10
After processing some logics to the table,
I don't know how to reconstruct  table(sequencial vertices) to polygon.
Is there any SDO function? or Should I use pivot the columns to CLOB and use 'FROM_WKTGEOMETRY'?
Thanks and Regards
Sangho, Kim.
글 수정: 951997
글 수정: 951997
글 수정: 951997

Answer 1

This will do it.
WITH polyPoints As
select 11847404 as pk, 193952.2429 as x, 432465.9997 as y, 1 as id from dual union all
select 11847404 as pk, 193942.4635 as x, 432459.81 as y, 2 as id from dual union all
select 11847404 as pk, 193941.1902 as x, 432461.8218 as y, 3 as id from dual union all
select 11847404 as pk, 193919.1535 as x, 432447.8742 as y, 4 as id from dual union all
select 11847404 as pk, 193905.9558 as x, 432439.521 as y, 5 as id from dual union all
select 11847404 as pk, 193907.2291 as x, 432437.5093 as y, 6 as id from dual union all
select 11847404 as pk, 193898.0412 as x, 432431.694 as y, 7 as id from dual union all
select 11847404 as pk, 193919.1577 as x, 432398.3308 as y, 8 as id from dual union all
select 11847404 as pk, 193946.2585 as x, 432415.4836 as y, 9 as id from dual union all
select 11847404 as pk, 193973.3593 as x, 432432.6365 as y, 10 as id from dual
select c.pk,sdo_geom.validate_geometry(c.polygon,0.005) as vGeom,  c.polygon
  from (SELECT a.pk,
               mdsys.sdo_geometry(2003,NULL,NULL,
                                  mdsys.sdo_elem_info_array(1,1003,1),
                                  CAST(MULTISET(SELECT b.COLUMN_VALUE
                                                  FROM polyPoints b,
                                                       TABLE(mdsys.sdo_ordinate_array(b.x,b.y)) b
                                                 WHERE b.pk = a.pk
                                                 ORDER BY b.id, rownum)
                                      AS mdsys.sdo_ordinate_array)) AS polygon
          FROM polyPoints a
         GROUP BY a.pk
         ORDER BY a.pk
        ) c;Note that vGeom shows, as FlyingGuy points out, that the geometry is not closed (13348).
regards
Simon
Edited by: Simon Greener on Apr 2, 2013 9:53 PM - Fixed SDO_GTYPE to be 2003 and not 3003 (thanks jhm)