Does 'ALTER INDEX' take exclusive lock?

Hi All,

Does the command ALTER INDEX take exclusive lock on the objects involved?
Specifically I am looking at ALTER INDEX ... SET TABLESPACE. The docs do not
mention anything about this. I assume it would, and can do a few tests (or
look at code :) ), but asking here wouldn't hurt!

Best regards,
--
gurjeet[.singh]@EnterpriseDB.com
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