Doctirine 2 Case Statement - doctrine-orm

Question

I use Doctirine 2 and zf2. How can i convert this sql query to dql. (Doctirine Query Language)
My product entity is here "Application\Entity\Product" I 've tried it but it doesn't work..
Thanks for your help.
SELECT price_range, count(*) AS num
FROM
(SELECT CASE WHEN price >= 0 AND price <= 10 THEN '0-10'
WHEN price >= 10 AND price <= 20 THEN '10-20'
WHEN price >= 20 AND price <= 30 THEN '30-40'
WHEN price >= 30 AND price <= 40 THEN '30-40'
WHEN price >= 40 AND price <= 50 THEN '40-50'
WHEN price >= 50 AND price <= 60 THEN '50-60'
WHEN price >= 60 AND price <= 70 THEN '60-70'
WHEN price >= 70 AND price <= 80 THEN '70-80'
WHEN price >= 80 AND price <= 90 THEN '90-100'
WHEN price >= 100 AND price <= 110 THEN '100-110'
ELSE 'over 1000'
END as price_range
FROM product
WHERE 1
) AS price_summaries
GROUP BY price_range

Answer 1

Well, unfortunately you can't. Doctrine doesn't support CASE. And looking at your problem, I'm also unable to find an adequate other solution with DQL.
You can however use a native query. Native queries are embedded raw SQL queries, basically an extension of PDO.
Native queries are of course generally discouraged, as they have two disadvantages:
You must do the hydration into Doctrine entities yourself, using ResultSetMapping (if you want the result of the query to contain ready-made entities instead of plain arrays/objects).
Native queries undermine the whole point of using a DBAL: you loose portability. (But, to be honest, most projects don't just switch their RDBMS, so it's a rather theoretical concern).
But if you need to have the above query executed, use a native query in this single case.

Answer 2

Doctirine support case statement.
This works
SELECT CASE WHEN (p.price >= 0 AND p.price <= 10) THEN '0-10'
WHEN (p.price >= 10 AND p.price <= 20) THEN '10-20'
WHEN (p.price >= 20 AND p.price <= 30) THEN '30-40'
WHEN (p.price >= 30 AND p.price <= 40) THEN '30-40'
WHEN (p.price >= 40 AND p.price <= 50) THEN '40-50'
WHEN (p.price >= 50 AND p.price <= 60) THEN '50-60'
WHEN (p.price >= 60 AND p.price <= 70) THEN '60-70'
WHEN (p.price >= 70 AND p.price <= 80) THEN '70-80'
WHEN (p.price >= 80 AND p.price <= 90) THEN '90-100'
WHEN (p.price >= 100 AND p.price <= 110) THEN '100-110'
ELSE 'over 1000'
END as price_range
FROM \Application\Entity\Product p
But this doesn't work, i think i should try native query
SELECT price_range, count(*) AS num
FROM
(SELECT CASE WHEN (p.price >= 0 AND p.price <= 10) THEN '0-10'
WHEN (p.price >= 10 AND p.price <= 20) THEN '10-20'
WHEN (p.price >= 20 AND p.price <= 30) THEN '30-40'
WHEN (p.price >= 30 AND p.price <= 40) THEN '30-40'
WHEN (p.price >= 40 AND p.price <= 50) THEN '40-50'
WHEN (p.price >= 50 AND p.price <= 60) THEN '50-60'
WHEN (p.price >= 60 AND p.price <= 70) THEN '60-70'
WHEN (p.price >= 70 AND p.price <= 80) THEN '70-80'
WHEN (p.price >= 80 AND p.price <= 90) THEN '90-100'
WHEN (p.price >= 100 AND p.price <= 110) THEN '100-110'
ELSE 'over 1000'
END as price_range
FROM \Application\Entity\Product p
) AS price_summaries
GROUP BY price_range