SQLDeveloper : Not enough arguments - oracle

Question

I'm writing an APEX application which utilises spatial for proximity searching via Googlemaps API, I've built the function and it compiles fine, however whenever I try to run it in SQLDeveloper I get the error not enough arguments.
The function I created to set the new lat/long point takes one input of postcode from my stores table, it then uses the Google map API to return the long lat co-ords for that postcode, which on return builds an SDO_GEOMETRY object, which is returned and set in a location column in the stores table.
Function code:
CREATE OR REPLACE FUNCTION set_spatial_point
(
-- Only accept postcodes from the store table
p_postcode stores.postcode%TYPE
)
RETURN MDSYS.SDO_GEOMETRY
IS
-- Build local variables
l_lng VARCHAR2(100);
l_lat VARCHAR2(100);
n_spatial_object MDSYS.SDO_GEOMETRY;
BEGIN
-- Populate long and lat parameters
POSTCODE_TO_LAT_LNG_GM_API(p_postcode, l_lat, l_lng);
-- Populate the new spatial object
n_spatial_object := MDSYS.SDO_GEOMETRY
(
-- use 01 as we wish to add the point to the map
2001,
-- SRID for WGS84 longitutde/latitude format
8307,
-- Set the information of the point ( we don't need a Z co-ord )
SDO_POINT_TYPE
(
l_lng,
l_lat,
null
),
null, -- We have no SDO_ELEM_INFO_ARRAY
null -- We have no SDO_ORDINATE_ARRAY
);
-- Return the new spatial object
dbms_output.put_line('sdo_gtype='||n_spatial_object.sdo_gtype);
dbms_output.put_line('first element from sdo_ordinates='||n_spatial_object.sdo_ordinates(1));
RETURN n_spatial_object;
END set_spatial_point;
Why am I getting the not enough arguments error, even when I call it with a valid stores.postcode%TYPE, ( I have tried changing to VARCHAR2 but that doesn't make any difference.)
EDIT:
After creating the function, I run a call to the method:
DECLARE
my_object MDSYS.SDO_GEOMETRY;
BEGIN
my_object := set_spatial_value('MK80PB');
END;
I now get the following error:
Error starting at line : 1 in command -
DECLARE
my_object MDSYS.SDO_GEOMETRY;
BEGIN
my_object := set_spatial_value('MK80PB');
END;
Error report -
ORA-06550: line 4, column 14:
PLS-00201: identifier 'SET_SPATIAL_VALUE' must be declared
ORA-06550: line 4, column 1:
PL/SQL: Statement ignored
06550. 00000 - "line %s, column %s:\n%s"
*Cause: Usually a PL/SQL compilation error.
*Action:

Answer 1

The error you get is obvious: you create the function as SET_SPATIAL_POINT() but you call SET_SPATIAL_VALUE() and that obviously fails since it does not exist.
Now, let's try this out. I had to replace some of your code since I don't have your declarations of the STORES table or the Google call, so I hard-coded the results from that call:
CREATE OR REPLACE FUNCTION set_spatial_point
(
-- Only accept postcodes from the store table
p_postcode varchar2
)
RETURN SDO_GEOMETRY
IS
-- Build local variables
l_lng VARCHAR2(100);
l_lat VARCHAR2(100);
n_spatial_object SDO_GEOMETRY;
BEGIN
-- Populate long and lat parameters
-- POSTCODE_TO_LAT_LNG_GM_API(p_postcode, l_lat, l_lng);
l_lat:=45.3;
l_lng:= 3.7;
-- Populate the new spatial object
n_spatial_object := SDO_GEOMETRY
(
-- use 01 as we wish to add the point to the map
2001,
-- SRID for WGS84 longitutde/latitude format
8307,
-- Set the information of the point ( we don't need a Z co-ord )
SDO_POINT_TYPE
(
l_lng,
l_lat,
null
),
null, -- We have no SDO_ELEM_INFO_ARRAY
null -- We have no SDO_ORDINATE_ARRAY
);
-- Return the new spatial object
dbms_output.put_line('sdo_gtype='||n_spatial_object.sdo_gtype);
dbms_output.put_line('first element from sdo_ordinates='||n_spatial_object.sdo_ordinates(1));
RETURN n_spatial_object;
END set_spatial_point;
/
show errors
That works fine.
Let's try it out:
SQL> select set_spatial_point('XXXX') from dual;
ERROR at line 1:
ORA-06531: Reference to uninitialized collection
ORA-06512: at "SCOTT.SET_SPATIAL_POINT", line 38
Again, this is obvious. The error is on line 38:
dbms_output.put_line('first element from sdo_ordinates='||n_spatial_object.sdo_ordinates(1));
That fails (obviously again) since n_spatial_object.sdo_ordinates() is null (like you wrote on line 32.
Let's remove those debugging lines and redefine the function. Then let's try it out. It now works as expected:
SQL> select set_spatial_point('XXXX') from dual;
SET_SPATIAL_POINT('XXXX')(SDO_GTYPE, SDO_SRID, SDO_POINT(X, Y, Z), SDO_ELEM_INF
-------------------------------------------------------------------------------
SDO_GEOMETRY(2001, 8307, SDO_POINT_TYPE(3.7, 45.3, NULL), NULL, NULL)
1 row selected.