OpenSearch/docs/reference/migration/migrate_7_5.asciidoc

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[[breaking-changes-7.5]]
== Breaking changes in 7.5
++++
<titleabbrev>7.5</titleabbrev>
++++
This section discusses the changes that you need to be aware of when migrating
your application to Elasticsearch 7.5.
See also <<release-highlights>> and <<es-release-notes>>.
coming[7.5.0]
//NOTE: The notable-breaking-changes tagged regions are re-used in the
//Installation and Upgrade Guide
//tag::notable-breaking-changes[]
//end::notable-breaking-changes[]
[discrete]
[[breaking_75_search_changes]]
=== Search Changes
[discrete]
==== Stricter checking for wildcard queries on _index
Previously, a wildcard query on the `_index` field matched directly against the
fully-qualified index name. Now, in order to match against remote indices like
i`cluster:index`, the query must contain a colon, as in `cl*ster:inde*`. This
behavior aligns with the way indices are matched in the search endpoint.