Parent/child queries don't work with via the delete by query api

[martijnvg]

Reported via ML:
https://groups.google.com/forum/?fromgroups=#!topic/elasticsearch/Wsv3ziKdeTk

[hari-tw]

we have the same issue.. any updates on this?

[snmaynard]

Any updates on when this might be fixed? I just need to know whether I should work round the issue or if we should just wait for an official fix?

[martijnvg]

I might take a while, before we fully support parent / child queries via the delete by query api.

[ofavre]

Here is a recreation gist https://gist.github.com/ofavre/5434929 , it fails under 0.90.0.RC2.
Is it safe to use {"term":{"_parent":"parenttype#parentid"}} as a workaround?

[martijnvg]

@ofavre This is safe to use. I'll make sure you don't get a NPE, when you use parent/child like queries with delete by query, but a descriptive error message for now.

[martijnvg]

Implemented via #3822