How to determine the RTD name generated by sdo_geor.init ()?

I did the following in a stored procedure:

insert into... values (sdo_geor.init ()) return newcol in gr.

Now, before you do anything with gr, I create the RTD whose name was generated by sdo_geor.init. How can I get this name? It doesn't seem to be a sdo_geor.get* procedure or function for this return.

What I'm trying to do is to implement this example of sdo_geor.copy, but without specifying a RTD in sdo_geor.init ():

DECLARE
GR1 sdo_georaster;
Sdo_georaster GR2;
BEGIN
INSERT INTO georaster_table VALUES (11, sdo_geor.init ('RDT_11', 1))
RETURN georaster INTO gr2;
Georaster SELECT INTO gr1 from georaster_table WHERE georid = 1;
sdo_geor. Copy (gr1, gr2);
UPDATE georaster_table SET georaster is gr2 WHERE georid = 11;.
COMMIT;
END;
/


If not, is there a way to generate a unique name for the RTD myself so that I can specify in the call to sdo_geor.init?

Thank you very much
Mike

Mike,

the name of table RTD is in the object georaster (gr), that you just created. It is an attribute of the sdo_georaster object, that is, gr. RASTERDATATABLE in your case.

in general, automatically generate the RTD name through sdo_geor.init is not recommended because that would generate a RTD for each object GeoRaster. A table of RTD should be used to contain many smaller GeoRaster objects raster blocks while you spend on a single table RTD for a huge object GeoRaster (an image with a size over tens of GB to several terabytes for example). Even if the RTD arrays are internal GeoRaster, creating the table RTD is made by users, which is intentional, so that you can take full advantage of the configuration and power setting of oracle database (for example, if the DSO is not used, the tables of RTD can be created on different tablespaces so that the raster blocks are distributed to different disks to improve performance).

to generate unique names for RTD, you can leverage the SEQUENCE object to create sequence numbers and then attach them to a special table name you have picked up.

Kind regards
Jeffrey

Tags: Database

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