Using XML based output of rq*Eval() for generating graphical views

Question

I've been trying the standard example used in training manuals of generating RandomRedDots.
(Scripts that donot involve images are working fine)
While using rqTableEval() the output format
1. using select clause (select cast(value as longvarchar(32000)) from dual)
2. 'png'
is throwing ORA-29400: data cartridge error
ORA-24333: zero iteration count
ORA-06512: at "RQSYS.RQTABLEEVALIMPL", line 7
ORA-06512: at line 4
3. 'xml' type is generating output as desired with two columns name, value.
When this xml query is used in physical table with columns - name as int, value as longvarchar(32000) as output is clob ,
the execution(view data) results as 'no data'.
Can i get help in how to utilize this xml output so that graphs can be made available in obiee dashboard ultimately.
Thanks

Answer 1

Hi,
R script to be executed is as follows:
begin
sys.rqScriptDrop('Example6');
sys.rqScriptCreate('Example6',
'function(n){
     res<-1:10
plot( 1:n, rnorm(n), pch = 21,
bg = "red", cex = 2 )
     res
end;
set long 20000
set pages 1000
select id,image
from table(rqTableEval(
cursor(select 100 n from dual),
NULL,
'PNG',
'Example6'));
ERROR message:
select id,image
ERROR at line 1:
ORA-29400: data cartridge error
ORA-24333: zero iteration count
ORA-06512: at "RQSYS.RQTABLEEVALIMPL", line 7
ORA-06512: at line 4
when tried with xml as output format since 'png' was not working
select name,value
from table(rqTableEval(
cursor(select 100 n from dual),
NULL,
'XML',
'Example6'))
there is xml output in sqlplus
NAME
VALUE
<root><R-data><vector_obj> <ROW-vector_obj><value>1</value></ROW-vector_obj><ROW
-vector_obj><value>2</value></ROW-vector_obj><ROW-vector_obj><value>3</value></R.......so on
How to utilize this output in physical layer of rpd, in table with select clause
I tried select dbms_lob.substr(value,100000,1) to convert the clob of xml to varbinary but then there is no output in sqlplus.
If the above is used as select clause for physical table it throws ORA:00904 "value" invalid identifier.
Can I please get help in getting this output in physical layer tables and eventually to presentation layer.
Have i missed something or some configuration needs to be done for acquiring the images
(ps: this is occurring for images and scripts involving number type are working fine.
I've included png and other packages in RProfile.site file)