2000-11-22 01:54:21 +08:00
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$Header: /cvsroot/pgsql/contrib/vacuumlo/Attic/README.vacuumlo,v 1.2 2000/11/21 17:54:21 tgl Exp $
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2000-06-19 22:02:16 +08:00
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This is a simple utility that will remove any orphaned large objects out of a
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2000-11-22 01:54:21 +08:00
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PostgreSQL database. An orphaned LO is considered to be any LO whose OID
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does not appear in any OID data column of the database.
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2000-06-19 22:02:16 +08:00
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Compiling
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--------
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Simply run make. A single executable "vacuumlo" is created.
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2000-11-22 01:54:21 +08:00
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Usage
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-----
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2000-06-19 22:02:16 +08:00
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vacuumlo [-v] database [db2 ... dbn]
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The -v flag outputs some progress messages to stdout.
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2000-11-22 01:54:21 +08:00
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2000-06-19 22:02:16 +08:00
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Method
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------
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First, it builds a temporary table which contains all of the oid's of the
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large objects in that database.
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2000-11-22 01:54:21 +08:00
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It then scans through all columns in the database that are of type 'oid',
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and removes any matching entries from the temporary table.
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The remaining entries in the temp table identify orphaned LOs. These are
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removed.
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2000-06-19 22:02:16 +08:00
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2000-11-22 01:54:21 +08:00
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Notes
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-----
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2000-06-19 22:02:16 +08:00
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I decided to place this in contrib as it needs further testing, but hopefully,
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2000-11-22 01:54:21 +08:00
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this (or a variant of it) would make it into the backend as a "vacuum lo"
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command in a later release.
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2000-06-19 22:02:16 +08:00
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Peter Mount <peter@retep.org.uk>
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http://www.retep.org.uk
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March 21 1999
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Committed April 10 1999 Peter
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