DDC-2995: Joined Inheritance Mapping and Filters #3759

doctrinebot opened this Issue Feb 22, 2014 · 6 comments

2 participants


Jira issue originally created by user cappy:

Is there any reason why Inheritance Mapping IS LEFT JOINED not INNER JOINED?

When there is a filter and it's left joined it happens a record might not have parent table record. For example

Class B extends Class A.
Class A have column isactive | and filter activated with isactive = 1 condition.

Final query: LEFT JOIN parenttable s1_ ON p2_.id = s1_.id AND (s1_.isactive = '1')

Record 1 have is_active = false, so result set looks like this:

tableb | tablea
id | id is_active discriminatorColumn
1 | null null null

and occurs exception: The discriminator column ... is missing for ....


Comment created by @ocramius:

JTI MUST be left-joined, since not every subclass of the root of the inheritance causes inserts on all of the inheritance tables.

What is the DQL query that is causing the problem?


Comment created by cappy:

Hello Marco, I don't query from parent table, but from child. No sense to be LEFT JOINED.

DQL is something like that:

SELECT class1, class2 FROM Class1 class1 JOIN class1.class2 class2;

(Class2 extends Class3)
Class3 have is_active column.

And following filter:

public function addFilterConstraint(ClassMetadata $targetEntity, $targetTableAlias) {
if (!$targetEntity->reflClass->implementsInterface('ActivateableInterface')) {
return "";
return $targetTableAlias . '.is_active = ' . $this->getParameter('isActive');

Filter condition is added in LEFT JOINED parent_table. Full example SQL:
FROM class1 c1
INNER JOIN class2 c2 ON c1.c2_id = c2.id
LEFT JOIN table3 c3 ON c2.id = c3.id AND (c3.is_active = '1')


Comment created by @ocramius:

There are two possible solutions here:

  • verify if the selected entity is a leaf of a JTI, and use INNER JOIN on that if possible (probably not optimal, since the selection may be part of a LEFT JOIN itself)
  • add filtering on the discriminator column

[~cappy] can you provide a failing test case to make it easier to work on this?


Comment created by cappy:

Yes. Here is it sample failing test.

http://pastebin.com/xi8uUNX5 - Parent Class
http://pastebin.com/XRZLbyGX - Child Class
http://pastebin.com/HuPFb98u - Assoc Class
http://pastebin.com/hGqRk74e - TestCase

Here it should found 0 records because ot JOIN and is_active = true filter.


Comment created by @beberlei:

Since filters are only available on the root, i guess inner join is really necessary here.


Comment created by cappy:

Do you need something more? The bug is status Feedback?

@Ocramius Ocramius was assigned by doctrinebot Dec 6, 2015
@doctrinebot doctrinebot added the Bug label Dec 7, 2015
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment