Aggregations order : Escaping the user defined AGG_NAME

[aaneja]

The order by path has the form defined as -
AGG_SEPARATOR := '>'
METRIC_SEPARATOR := '.'
AGG_NAME :=
METRIC := <the name of the metric (in case of multi-value metrics aggregation)>
PATH := <AGG_NAME>[<AGG_SEPARATOR><AGG_NAME>]*[<METRIC_SEPARATOR>]

Since AGG_NAME can contain dots (.) which is the METRIC_SEPARATOR, is it possible to somehow quote the AGG_NAME ?

A similar problem would arise if the multi-value metric aggregation name is a part of AGG_NAME

[aaneja]

I took a quick look at src/main/java/org/elasticsearch/search/aggregations/support/OrderPath.java and it doesn't look like there's any code to escape/quote parts of the order path.

[clintongormley]

Related to #6736

[colings86]

closing in favour of #9059