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+* PostgreSQL implementation of SchemaStatements#index_name_exists?
+
+ The database agnostic implementation does not detect with indexes that are
+ not supported by the ActiveRecord schema dumper. For example, expressions
+ indexes would not be detected.
+
+ This fixes #11018.
+
+ *Jonathan Baudanza*
+
* Currently Active Record can be configured via the environment variable
`DATABASE_URL` or by manually injecting a hash of values which is what Rails does,
reading in `database.yml` and setting Active Record appropriately. Active Record