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+* `type_to_sql` returns a `String` for unmapped columns. This fixes an error
+ when using unmapped array types in PG
+
+ Example:
+
+ change_colum :table, :column, :bigint, array: true
+
+ Fixes #13146.
+
+ *Jens Fahnenbruck*, *Yves Senn*
+
* Fix `QueryCache` to work with nested blocks, so that it will only clear the existing cache
after leaving the outer block instead of clearing it right after the inner block is finished.