Symfony - addHaving - concat + regexp - regex

Question

Raw query:
select firstfield, secondfield, phone_number, thirdfield
from table
having CONCAT(firstfield, ' ', secondfield, ' ', thirdfield, ' ', fourthfield) regexp 'value'
and CONCAT(firstfield, ' ', secondfield, ' ', thirdfield, ' ', fourthfield) regexp 'value2'
and CONCAT(firstfield, ' ', secondfield, ' ', thirdfield, ' ', fourthfield) regexp 'value3'
and CONCAT(firstfield, ' ', secondfield, ' ', thirdfield, ' ', fourthfield) regexp 'value4'
Querybuilder
$qb->select(
'firstfield',
'secondfield',
'thirdfield',
'fourthfield',
)->from(Table, 'u');
$queryHaving = "CONCAT(firstfield, ' ', secondfield, ' ', thirdfield, ' ', fourthfield) regexp 'value'";
$qb->andhaving($queryHaving);
$queryHaving = "CONCAT(firstfield, ' ', secondfield, ' ', thirdfield, ' ', fourthfield) regexp 'value2'";
$qb->andhaving($queryHaving);
Problem:
How to collect concat with regexp not as function? Tried using literal() function but it is not possible to create due error throws on not possible to assign into.

Answer 1

The query seems to work for me for MySQL with any of these 2 forms:
select *
from test
having concat(field1, field2) regexp '^[FB].*' and
concat(field1, field2) regexp 'o$';
select *
from test
where concat(field1, field2) regexp '^[FB].*' and
concat(field1, field2) regexp 'o$';
See demo here
I'm just thinkging about the problem could be with CHAR columns
So, for example, one column would have FOO<space><space> on a CHAR(5) instead of FOO at VARCHAR(5). So when concatenating you would have something similar to FOO<space><space>BAR<space><space> and thus the regex would fail.
However, with SQLFiddle it doesn't seem to be the case. It does not seem to add spaces. See here.
Anyways, it may be worth trying on your app: Are you using chars or varchars? Could you try adding trims at the columns, like this:
select *,concat(trim(field1), trim(field2))
from test
having concat(trim(field1), trim(field2)) regexp '^[FB].*' and
concat(trim(field1), trim(field2)) regexp 'o$';
select *,concat(trim(field1), trim(field2))
from test
where concat(trim(field1), trim(field2)) regexp '^[FB].*' and
concat(trim(field1), trim(field2)) regexp 'o$';
Demo here.