mosh created SOLR-12519:
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Summary: Support Deeply Nested Docs In Child Documents Transformer
Key: SOLR-12519
URL: https://issues.apache.org/jira/browse/SOLR-12519
Project: Solr
Issue Type: Sub-task
Security Level: Public (Default Security Level. Issues are Public)
Reporter: mosh
As discussed in SOLR-12298, to make use of the meta-data fields in SOLR-12441,
there needs to be a smarter child document transformer, which provides the
ability to rebuild the original nested documents' structure.
In addition, I also propose the transformer will also have the ability to
bring only some of the original hierarchy, to prevent unnecessary block join
queries. e.g.
{code} {"a": "b", "c": [ {"e": "f"}, {"e": "g"} , {"h": "i"} ]} {code}
Incase my query is for all the children of "a:b", which contain the key "e" in
them, the query will be broken in to two parts:
1. The parent query "a:b"
2. The child query "e:*".
If the only children flag is on, the transformer will return the following
documents:
{code}[ {"e": "f"}, {"e": "g"} ]{code}
In case the flag was not turned on(perhaps the default state), the whole
document hierarchy will be returned, containing only the matching children:
{code}{"a": "b", "c": [ {"e": "f"}, {"e": "g"} ]{code}
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