Skip to Main Content
Forums

Database Software

Announcement

For appeals, questions and feedback about Oracle Forums, please email oracle-forums-moderators_us@oracle.com. Technical questions should be asked in the appropriate category. Thank you!

Interested in getting your voice heard by members of the Developer Marketing team at Oracle? Check out this post for AppDev or this post for AI focus group information.

Link to versioned tables from other schema

aschillingMay 4 2012 — edited May 7 2012
hi!

we are currently evaluating possible data synchronization mechanisms for a future database A that should use data from an existing database B.
option 1 is the simplest: export data from B, import in A and you're done. problems are of course the usual ones like hassle with import/export, how up-to-date the data is, etc.
however we are more interested in option 2: link to the tables in B from A. if we are not wrong here we could establish this by using dblink and synonyms.
importand fact is, the tables in B are versioned with OWM. is it in any way possible to link to those in that case? and if so, how would workspace/savepoint selection be handled?
we suspect it's not possible, at least not if the tables in database A aren't versioned as well. or one would need to omit real foreign keys when referencing versioned tables in B from A, which isn't exactly good either.

thanks for any hints in advance!

regards,

Andreas
This post has been answered by Ben Speckhard-Oracle on May 7 2012
Jump to Answer

Comments

Mike Kutz

Custom Aggregate functions are implemented via Oracle Data Cartridge Interface (ODCI).
They're UDTs that have a specific set of functions. (ODCIAggregate)
User-Defined Aggregate Functions Interface (0 Bytes)

1 person found this helpful
Solomon Yakobson

Not exactly sure what you need:

with vertices as (
                  select '001' line_id,1 part_num,1 vertex_num,0 x,5 y,0 m from dual union all
                  select '001',1,2,10,10,11.18 from dual union all
                  select '001',1,3,30,0,33.54 from dual union all
                  select '001',2,1,50,10,33.54 from dual union all
                  select '001',2,2,60,10,43.54 from dual
                 ),
           t1 as (
                  select  line_id,
                          part_num,
                          vertex_num,
                          x x_from,
                          y y_from,
                          count(*) over(partition by line_id,part_num) cnt,
                          lead(x) over(partition by line_id,part_num order by vertex_num) x_to,
                          lead(y) over(partition by line_id,part_num order by vertex_num) y_to
                    from  vertices
                 ),
           t2 as (
                  select  line_id,
                          part_num,
                          vertex_num,
                          sdo_geometry(
                                       2002,
                                       null,
                                       null,
                                       sdo_elem_info_array(1,2,1),
                                       sdo_ordinate_array(x_from,y_from,x_to,y_to)
                                      ) section
                    from  t1
                    where vertex_num < cnt
                 )
select  line_id,
        part_num,
        sdo_aggr_concat_lines(section) line
  from  t2
  group by line_id,
           part_num
  order by line_id,
           part_num
/

LINE_ID   PART_NUM LINE(SDO_GTYPE, SDO_SRID, SDO_POINT(X, Y, Z), SDO_ELEM_INFO, SDO_ORDINATES)
------- ---------- -----------------------------------------------------------------------------------------------------
001              1 SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(0, 5, 10, 10, 30, 0))
001              2 SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(50, 10, 60, 10))

SQL>

SY.

1 person found this helpful
_jum

Another approach:

WITH vertices (line_id,part_num,vertex_num,x,y,m) AS 
 (SELECT '001',1,1, 0, 5,   0 FROM dual UNION ALL
  SELECT '001',1,2,10,10,11.18 FROM dual UNION ALL
  SELECT '001',1,3,30, 0,33.54 FROM dual UNION ALL
  SELECT '001',2,1,50,10,33.54 FROM dual UNION ALL
  SELECT '001',2,2,60,10,43.54 FROM dual),
 t1 AS                     
 (SELECT x coord, line_id, part_num, vertex_num FROM vertices
    UNION ALL          
  SELECT y     , line_id, part_num, vertex_num FROM vertices)
 SELECT line_id, part_num
      , sdo_geometry(2002, NULL, NULL
        , sdo_elem_info_array(1,2,1)
        , CAST(collect (coord ORDER BY line_id, part_num, vertex_num) AS sdo_ordinate_array)) line
  FROM t1            
 GROUP BY line_id, part_num;


LINE_ID   PART_NUM LINE(SDO_GTYPE, SDO_SRID, SDO_POINT(X, Y, Z), SDO_ELEM_INFO, SDO_ORDINATES)
------- ---------- -----------------------------------------------------------------------------------------------------
001              1 SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(0, 5, 10, 10, 30, 0))
001              2 SDO_GEOMETRY(2002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(50, 10, 60, 10))
1 person found this helpful
User_1871

@jum3
Thanks! Does that approach assume that we'd need to do an additional step afterwards: merge the two single-part geometries into a multi-part geometry?

_jum

Yes, with an additional merge step, based on an adapted and extended (for M) approach of @SY or mine. The present draft was ready
This collapse is certainly possible in one very smart step...

Solomon Yakobson

@_jum: Another approach:
Careful, you need to weigh X & Y, othersise you get non-deterministic results and Y can end up first:

WITH vertices (line_id,part_num,vertex_num,x,y,m) AS 
 (SELECT '001',1,1, 0, 5,   0 FROM dual UNION ALL
  SELECT '001',1,2,10,10,11.18 FROM dual UNION ALL
  SELECT '001',1,3,30, 0,33.54 FROM dual UNION ALL
  SELECT '001',2,1,50,10,33.54 FROM dual UNION ALL
  SELECT '001',2,2,60,10,43.54 FROM dual),
 t1 AS                     
 (SELECT x coord, line_id, part_num, vertex_num, 1 weight FROM vertices
    UNION ALL          
  SELECT y     , line_id, part_num, vertex_num,2 weight FROM vertices)
 SELECT line_id, part_num
      , sdo_geometry(2002, NULL, NULL
        , sdo_elem_info_array(1,2,1)
        , CAST(collect (coord ORDER BY line_id, part_num, vertex_num,weight) AS sdo_ordinate_array)) line
  FROM t1            
 GROUP BY line_id, part_num;

SY.

1 person found this helpful
_jum

Of course, I need a break - Thanks @Solomon Yakobson!

User_1871

@jum3
This collapse is certainly possible in one very smart step...
What's the smart step for merging?

_jum

I honestly have no idea currently!

_jum

Last step could be:

SELECT sdo_geom.sdo_union(
       SDO_GEOMETRY(3002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(0, 5, 0, 10, 10, 11.18, 30, 0, 33.54))
     , SDO_GEOMETRY(3002, NULL, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(50, 10, 33.54, 60, 10, 43.54))
     , 0.01) ugeom
 FROM dual; 

UGEOM
---------------------------------
MDSYS.SDO_GEOMETRY(3006, NULL, NULL
      , MDSYS.SDO_ELEM_INFO_ARRAY(1, 2, 1, 10, 2, 1)
      , MDSYS.SDO_ORDINATE_ARRAY(0, 5, 0, 10, 10, 11.18, 30, 0, 33.54, 50, 10, 33.54, 60, 10, 43.54))

1 person found this helpful
odie_63

Isn't it just a matter of CONCAT them together?

WITH vertices (line_id,part_num,vertex_num,x,y,m) AS 
 (SELECT '001',1,1, 0, 5,  0 FROM dual UNION ALL
 SELECT '001',1,2,10,10,11.18 FROM dual UNION ALL
 SELECT '001',1,3,30, 0,33.54 FROM dual UNION ALL
 SELECT '001',2,1,50,10,33.54 FROM dual UNION ALL
 SELECT '001',2,2,60,10,43.54 FROM dual),
 t1 AS           
 (SELECT x coord, line_id, part_num, vertex_num, 1 weight FROM vertices
  UNION ALL      
 SELECT y   , line_id, part_num, vertex_num,2 weight FROM vertices
 UNION ALL      
 SELECT m   , line_id, part_num, vertex_num,3 weight FROM vertices
 )
, t2 as (
 SELECT line_id, part_num
   , sdo_geometry(2002, NULL, NULL
    , sdo_elem_info_array(1,2,1)
    , CAST(collect (coord ORDER BY line_id, part_num, vertex_num,weight) AS sdo_ordinate_array)) line
 FROM t1       
 GROUP BY line_id, part_num
 )
 select line_id
   , sdo_aggr_concat_lines(line) 
 from t2
 group by line_id
 ;
1 - 11
Locked Post
New comments cannot be posted to this locked post.

Post Details

Locked on Jun 4 2012
Added on May 4 2012
#database-key-features, #workspace-manager
1 comment
1,199 views