Sdo_elem_info elements

Question

Hello,
I would like to select the data in the sdo_elem_info.
When I use this query:
select a.geom.sdo_elem_info
from test a where rownum =1
I get:
SDO_ELEM_INFO_ARRAY(1, 1003, 1, 605, 2003, 1)
I want to select it so it looks like this:
1|1003|1|605|2003|1
I have tried several ideas, and searched the archives.
None of these work:
select a.geom.sdo_elem_info(0)
from test a where rownum =1
select a.geom.sdo_elem_info_array(0)
from test a where rownum =1
select a.geom.sdo_elem_info.sdo_elem_info_array(0)
from test a where rownum =1
I am using sdo_util.getvertices to get the sdo_ordinates.
Any help is appreciated.
Thank you.
S

Answer 1

Hello
For plain SQL the difficulty is dealing with varying length of the array sdo_elem_info. This is how far I got. As you will see this will only return the concatenated first 3 elements.
In order to have it working in more flexible way you have to make some flexible Pivot table function.
So it is easier using the function of Dan.
select id,
max(decode(rn, 1, column_value)) || '|' ||
   max(decode(rn, 2, column_value))  || '|' ||
       max(decode(rn, 3, column_value)) elem_info
   from
      (select id, column_value,
              row_number() over (partition by rowid order by rowid) Rn
       from your_table r, table(r.GEOMETRY.SDO_ELEM_INFO)
      ) T
  group by id
In case you're ok with a normal table record output, you can use Reggie's query or this one listing also the array position of the element for every feature.
select id, column_value,
              row_number() over (partition by rowid order by rowid) position
       from your_table r, table(r.GEOMETRY.SDO_ELEM_INFO)Luc