I'm trying to `regexp_replace()` all the values of a column ending without "/", by adding "/".

I can get the correct values by using this statement (the pattern was tested with a PCRE checker):

```
SELECT * FROM `table` WHERE `column` REGEXP("(?<=[^\/])$");

```

And the non-matching ones with:

```
SELECT * FROM `table` WHERE `column` REGEXP("(?<![^\/])$");

```

But when the statement is:

```
UPDATE `table` SET `column` = REGEXP_REPLACE(`column`, "(?<=[^\/])$", "/");

```

Then, there is no change, whatever value I put into the third parameter:

```
Query OK, 0 rows affected (0.00 sec)
Rows matched: 1031  Changed: 0  Warnings: 0

```