davebarnes97 commented on a change in pull request #6279:
URL: https://github.com/apache/geode/pull/6279#discussion_r626670479
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File path: geode-docs/developing/query_index/creating_map_indexes.html.md.erb
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@@ -58,4 +58,7 @@ In order to create or query a map index, you must use the
bracket notation to li
**Note:**
You can still query against Map or HashMap fields without querying against a
map index. For example, you can always create a regular range query on a single
key in any Map or HashMap field. However, note that subsequent query lookups
will be limited to a single key.
+**Note:**
+Map indexes on all keys (when `*` is specified) are not used in queries where
the map field is compared with `null` or when it is compared using `!=`, e.g.
`p.positions['company1'] = null` or `p.positions['company1'] != '3'`.
+These types of queries will be executed without making use of the index which
could make them slower.
Review comment:
Please insert a comma after "index": ...making use of the index, which
could...
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