moshebla commented on a change in pull request #549: WIP:SOLR-13129
URL: https://github.com/apache/lucene-solr/pull/549#discussion_r253303258
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File path: solr/solr-ref-guide/src/nested-documents.adoc
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@@ -264,11 +273,12 @@ For the upcoming examples, assume the following
documents have been indexed:
}
----
-==== Combining Block Join Query Parser with Child Doc Transformer
- * The combination of these two features enable seamless creation of powerful
queries. +
- For example, querying posts which are under a page tagged as a job, contain
the words "Search Engineer".
- The comments for matching posts can also be fetched, all done in a single
Solr Query.
- `q=+{!child of='-\_nest_path_:* *:*'}+tags:"jobs" &fl=*,[child]
+==== Combining Block Join Query Parsers with Child Doc Transformer
+The combination of these two features enable seamless creation of powerful
queries. +
+For example, querying posts which are under a page tagged as a job, contain
the words "Search Engineer".
+The comments for matching posts can also be fetched, all done in a single Solr
Query.
+
+ * `q=+{!child of='-\_nest_path_:* *:*'}+tags:"jobs" &fl=*,[child]
Review comment:
Yeah,
I did test it manually and observed odd results.
When using +{!child of='-\_nest_path_:*'}+tags:"jobs" no documents are found.
This seems to be a problem with the way queries are optimized.
When there is only a NOT clause in the "of" filter, the query is optimized
to a MatchNoDocsQuery.
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