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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*
+
* Parsing PostgreSQL arrays with empty strings now works correctly.
Previously, if you tried to parse `{"1","","2","","3"}` the result