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Introduce ParentJoinFieldMapper, a field mapper that creates parent/child relation within documents of the same index #24978

Merged
merged 3 commits into from
May 31, 2017
Merged

Introduce ParentJoinFieldMapper, a field mapper that creates parent/child relation within documents of the same index #24978

merged 3 commits into from
May 31, 2017

Commits on May 31, 2017

  1. Introduce ParentJoinFieldMapper, a field mapper that creates parent/c… 

    …hild relation within documents of the same index

This change adds a new field mapper named ParentJoinFieldMapper. This mapper is a replacement for the ParentFieldMapper but instead of using the types in the mapping
it uses an internal field to materialize parent/child relation within a single index.
This change also adds a fetch sub phase that automatically retrieves the join name (parent or child name) and the parent id for child documents in the response hit fields.
The compatibility with `has_parent`, `has_child` queries and `children` agg will be added in a follow up.

Relates elastic#20257
    @jimczi
    jimczi committed May 31, 2017
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  2. Remove unrelated change

    @jimczi
    jimczi committed May 31, 2017
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  3. after review

    @jimczi
    jimczi committed May 31, 2017
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