Remove spclocation field from pg_tablespace
This is a backport of the below commit from upstream 9.3: commit 16d8e594 Author: Magnus Hagander <magnus@hagander.net> Date: Wed Dec 7 10:35:00 2011 +0100 Remove spclocation field from pg_tablespace Instead, add a function pg_tablespace_location(oid) used to return the same information, and do this by reading the symbolic link. Doing it this way makes it possible to relocate a tablespace when the database is down by simply changing the symbolic link.
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