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Update migration-guide-5.2-5.3.adoc

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Peter-Josef Meisch
2024-07-04 20:58:41 +02:00
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src/main/antora/modules/ROOT/pages/migration-guides/migration-guide-5.2-5.3.adoc
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@@ -5,7 +5,10 @@ This section describes breaking changes from version 5.2.x to 5.3.x and how remo
[[elasticsearch-migration-guide-5.2-5.3.breaking-changes]]
== Breaking Changes
During the parameter replacement in `@Query` annotated repository methods previous versions wrote the String _"null"_ into the query that was sent to Elasticsearch
when the actual parameter value was `null`. As Elasticsearch does not store `null` values, this behaviour could lead to problems, for example whent the fields to be
searched contains the string `"null"`. In Version 5.3 a `null` value in a parameter will cause a `ConversionException` to be thrown. If you are using `"null"` as the
`null_value` defined in a field mapping, then pass that string into the query instead of a Java `null`.
[[elasticsearch-migration-guide-5.2-5.3.deprecations]]
== Deprecations