I found the problem, it looks like nnlength := length(newnode); is not getting reset
create or replace function nnodetestt(text) returns text language plpgsql as $$
DECLARE
newnode alias for $1;
nnlength integer;
t text;
nmarker text;
BEGIN
nnlength := length(newnode);
for i in 1..(nnlength-1) loop
select into t
node
from
(Values('threeee','N'),('threee',''),('fiveu','N'),('five',''))
blast(node,nmarker)
where node = substring(newnode,1,i-1)||substring(newnode,i+1,nnlength);
end loop;
return t;
END;
$$
select
node as node_orig,
nmarker,
nnodetestt(node),
case
when nmarker = 'N' then
nnodetestt(node)
end
from
(Values('threeee','N'),('threee',''),('fiveu','N'),('five',''))
blast(node,nmarker)
"threeee";"N";"threee";"threee"
"threee";"";"";""
"fiveu";"N";"";""
"five";"";"";""
