postgresql - select from nested hstore and then delete - hstore

Question

My code below works but is there a better approach to this? What would the syntax for the delete be?
Thanks in advance, my mainframe background is showing.
v_result boolean;
v_all_skills hstore [];
v_skill hstore;
v_skill_details hstore;
v_num_skills integer;
v_ii integer;
v_found boolean;
raise notice 'BEFORE (%)', v_all_skills;
select array_length(v_all_skills,1 ) into v_num_skills;
v_found = FALSE;
FOR v_ii IN 1..v_num_skills LOOP
v_skill = v_all_skills[v_ii];
v_found = v_skill -> 'skill_id' = v_skill_id;
IF v_found THEN
v_skill_details = v_skill -> 'skill_details';
**-- here I need to delete the selected v_skill from v_all_skills for the given skill_id**
EXIT;
END IF;
END LOOP;
raise notice 'v_found (%)', v_found;
raise notice 'AFTER v_all_skills (%)', v_all_skills;
raise notice 'AFTER v_skill_details (%)', v_skill_details;
NOTICE: BEFORE ({"\"skill_id\"=>\"aa000001\", \"skill_details\"=>\"\\"skill_level\\"=>\\"5\\", \\"level_confirmed\\"=>\\"true\\", \\"level_confirmed_by\\"=>\\"624\\"\""})
NOTICE: v_found (t)
NOTICE: AFTER v_all_skills \n ({"\"skill_id\"=>\"aa000001\", \"skill_details\"=>\"\\"skill_level\\"=>\\"5\\", \\"level_confirmed\\"=>\\"true\\", \\"level_confirmed_by\\"=>\\"624\\"\""})
NOTICE: AFTER v_skill_details ("skill_level"=>"5", "level_confirmed"=>"true", "level_confirmed_by"=>"624")

Answer 1

OK, I have re-designed it to get the desired result with a new hstore v_all_skills_new
FOR v_ii IN 1..v_num_skills LOOP
v_skill = v_all_skills[v_ii];
v_found = v_skill -> 'skill_id' = v_skill_id;
CASE
WHEN (v_action = 1 OR v_action = 2) THEN -- insert/update the a skill
IF NOT v_found THEN -- keep existing skill before inserting the new one
v_all_skills_new = array_append(v_all_skills_new , v_skill);
END IF;
-- build the new/updated skill from input
v_skill_details = hstore(ARRAY['skill_level','level_confirmed','level_confirmed_by'],
ARRAY[v_skill_level::TEXT, v_skill_level_confirmed::TEXT, v_skill_level_confirmed_by::TEXT]);
v_skill = hstore(ARRAY['skill_id', 'skill_details'],
ARRAY[v_skill_id::TEXT, v_skill_details::TEXT]);
v_all_skills_new = array_append(v_all_skills_new, v_skill); -- insert new/updated skill
WHEN v_action = 3 THEN -- delete(i.e. do not move to new array) skill if found
IF NOT v_found THEN -- keep existing skill before inserting the new one
v_all_skills_new = array_append(v_all_skills_new , v_skill);
END IF;
END CASE;
END LOOP;