On 2025-10-13 Mo 10:22 AM, jian he wrote:
On Mon, Jul 21, 2025 at 2:31 PM jian he <[email protected]> wrote:
actually,
section (9.7.3.)
https://www.postgresql.org/docs/current/functions-matching.html#FUNCTIONS-POSIX-REGEXP
already have example, like:
substring('foobar' from 'o(.)b')
new patch attached, split substr, substring to make review more easier.
v6-0001: add function argument name to function substr
v6-0002: add function argument name to function substring
v6-0002 incorporated some of the changes in v5-0002-v3-delta.patch.
some of the changes in v5-0002-v3-delta.patch are not related to this thread,
so I didn't incorporate them, right now.
hi.
rebased.
I'm late to the party on this, but I wonder if it wouldn't be better to
use a type-neutral parameter name here, like "source", which could cover
all these cases, instead of "string", "bytes", etc.
cheers
andrew
--
Andrew Dunstan
EDB: https://www.enterprisedb.com
