Update column value after some validation on it - sql

Question

I have a scenario where i need to update the value of a column or say append !
Below is test table and data
create table test (rsrc_nm varchar2(50), parm varchar2(400));
insert into test values ('HLRCamelProfileBasic','resource_code:7|resource_type:HLR_Camel_Profile|Priority:1|');
insert into test values ('HSSUSERProfileBasic','resource_code:3|resource_type:HSS_User_Profile|Priority:1|');
insert into test values ('HSSUSERProfileBasic','resource_code:3|resource_type:HSS_User_Profile|Priority:2|');
insert into test values ('HSSUSERProfileBasic','resource_code:3|resource_type:HSS_User_Profile|Priority:1|');
insert into test values ('HLRBaseProfileBasic','resource_code:1|resource_type:HLR_Base_Profile|Priority:2|');
insert into test values ('HLRBaseProfileBasic','resource_code:1|resource_type:HLR_Base_Profile|Priority:3|');
Here we have 2 columns of a staging table in which rsrc_nm and parm are given what i have to do is i need to update or append the rsrc_nm column for parm coulmn where the last value i.e. priority is changing from 1 to 2 for same rsrc_nm.
For example
rsrc_ nm -- HSSUSERProfileBasic parm -- resource_code:3|resource_type:HSS_User_Profile|Priority:1|
rsrc_ nm -- HSSUSERProfileBasic parm -- resource_code:3|resource_type:HSS_User_Profile|Priority:2|
Here we have same parm priority but the values are different and i need to insert these values into another table for which i need to separate all PIPE values so while i insert it in the table it gives me error for unique constraint because that table table have 3 columns
RSRC_NM PARM VAL
------------------------------- -------------- ----------------
HSSUSERProfileBasic Priority 1
HLRCamelProfileBasic Priority 1
HLRBaseProfileBasic Priority 2
And on this table we have primary key on first two columns which enforce unique constraint also so i can not insert " HLRCamelProfileBasic " rsrc_nm for parm " Priority " because it fails in uniqueness.
So i find a solution to overcome this if i can append or update the rsrc_nm HLRCamelProfileBasic to " HLRCamelProfileBasic_1 " for " Priority:1 " and HLRCamelProfileBasic_2 for " Priority:2 " and so on for all RSRC_NM in Staging table.
My solution --
declare
cursor c1 is select * from RSRC_SVC_MAPPING where parm_entry like '%Priorit%';
parm_entry_length number;
l_value varchar2(100);
parm_name varchar2(100);
parm_val varchar2(100);
l_c1 c1%rowtype;
l_cnt number := 0;
l_rsrc_nm varchar2(100);
begin
open c1;
loop
fetch c1 into l_c1;
parm_entry_length := length(l_c1.Parm_Entry) - length(replace(l_c1.Parm_Entry,'|',''));
for i in 1 .. parm_entry_length loop
select regexp_substr(l_c1.Parm_Entry,'[^|]+',1,i) into l_value from dual;
select regexp_substr (l_value, '[^:]+', 1, 1) into parm_name from dual;
select regexp_substr (l_value, '[^:]+', 1, 2) into parm_val from dual;
-- dbms_output.put_line(l_value||' '||parm_name||' '||parm_val||' '||l_c1.resourcename);
for r in ( select count(*) cnt, resourcename
-- into l_cnt , l_rsrc_nm
from (select count(*), resourcename, parm_entry from RSRC_SVC_MAPPING where parm_entry like '%Priorit%' group by resourcename, parm_entry) group by resourcename)
loop
if r.cnt > 1
then
dbms_output.put_line(l_value||' '||parm_name||' '||parm_val||' '||l_c1.resourcename);
update RSRC_SVC_MAPPING
set resourcename = r.resourcename||'_'||l_cnt
where resourcename = r.resourcename;
l_cnt := l_cnt +1;
end if;
end loop;
end loop;
exit when c1%notfound;
end loop;
exception
when others then
dbms_output.put_line('ERROR OCCURED '||SQLCODE||' '||sqlerrm);
dbms_output.put_line(dbms_utility.format_error_backtrace());
end;
Data which needs to be like after UPDATE is like
HSSUSERProfileBasic_1 resource_code:3|resource_type:HSS_User_Profile|Priority:1|
HSSUSERProfileBasic_2 resource_code:3|resource_type:HSS_User_Profile|Priority:2|
HLRBaseProfileBasic_2 resource_code:1|resource_type:HLR_Base_Profile|Priority:2|
HLRBaseProfileBasic_3 resource_code:1|resource_type:HLR_Base_Profile|Priority:3|
Here we have changed the value rsrc_nm column and append it with the value of priority i.e. 1 and 2
target table is like
create table target (rsrc_nm varchar2(100), parm varchar2(50), val varchar2(50) constraint tgt_pk primary key (rsrrc_nm, parm));
MY DB is -- Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production