On 16/05/12 14:54, Gauthier, Dave wrote:
> bi_hsx_a0_latest=# select regexp_replace('xxx','^xxxy$',null);
> regexp_replace
> ----------------
>
> (1 row)
> But why did it return null in this case? I would think no match would leave it 'xxx'.
If a function is defined as "strict" then any null parameters
automatically result in a null result.
And indeed, this:
SELECT * FROM pg_proc WHERE proname LIKE 'regexp_r%';
shows pro_isstrict is set to true, as it is for most other function.s
--
Richard Huxton
Archonet Ltd