Hi,
why isn't 'aa' always treated as string?
While testing function for levenshtein distance I've noticed that:
with x as (
select
'1' a,
'2' b
)
SELECT levenshtein(a, b), length(a)
FROM x;
ERROR: failed to find conversion function from unknown to text
with x as (
select
'1'::TEXT a,
'2'::TEXT b
)
SELECT levenshtein(a, b), length(a)
FROM x;
levenshtein | length
-------------+--------
1 | 1
(1 row)
Why should I cast '1' to '1'::TEXT to satisfy a function (TEXT, TEXT)?
thanks,
Szymon
