[GH-8471] undeprecate partials completly

[beberlei]

This undeprecates SELECT PARTIAL DQL queries. EntityManager::getPartialReference is still deprecated, since it will be indistinguishable from EntityManager::getReference in the future.

Related:

• Deprecate Partial Objects #8471
• Reintroduce PARTIAL, but only for non-object hydration. #11365
• Remove partial syntax in DQL #10985

[kevinpapst]

Probably not the best place, but I don't know where else:

This actually takes away a huge burden. I already invested many hours in replacing PARTIAL with the new fetchMode() but many use-cases were not covered and I wonder (and hope) that those are still on the roadmap ... but removing these specific deprecation actually improves my DX a lot.

Thank you 👍

[laufhannes]

Is it correct and wanted that the deprecation notice is still there in https://github.com/beberlei/doctrine2/blob/fc299b184b6c8e918ba08e4328687db126699ccd/src/UnitOfWork.php#L2991-L2996?

[greg0ire]

Why are you linking to another repository than doctrine/orm?

[laufhannes]

Because I copied it from the merge request. Here you go: https://github.com/doctrine/orm/blob/2.20.0/src/UnitOfWork.php#L2991-L2996

[beberlei]

@laufhannes good question, i need to look what the difference between HINT_PARTIAL and the HINT_FORCE_PARTIAL_LOAD constants are, I did not see this second location in createEntity during my PR, so its probably an oversight not to remove it.