Hi:
bi_hsx_a0_latest=# select regexp_replace('xxx','^xxx$','abc');
regexp_replace
----------------
abc
(1 row)
expected behavior because there's a match
bi_hsx_a0_latest=# select regexp_replace('xxx','^xxxy$','abc');
regexp_replace
----------------
xxx
(1 row)
expected because there is no match (the 'y' in 'xxxy')
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'.
Thanks in Advance for any help and/or explanation.
