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55 lines
1.4 KiB
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55 lines
1.4 KiB
Plaintext
$PostgreSQL: pgsql/contrib/vacuumlo/README.vacuumlo,v 1.4 2003/11/29 19:51:36 pgsql Exp $
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This is a simple utility that will remove any orphaned large objects out of a
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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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Compiling
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--------
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Simply run make. A single executable "vacuumlo" is created.
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Usage
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-----
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vacuumlo [options] database [database2 ... databasen]
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All databases named on the command line are processed. Available options
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include:
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-v Write a lot of progress messages
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-n Don't remove large objects, just show what would be done
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-U username Username to connect as
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-W Prompt for password
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-h hostname Database server host
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-p port Database server port
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Method
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------
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First, it builds a temporary table which contains all of the OIDs of the
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large objects in that database.
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It then scans through all columns in the database that are of type "oid"
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or "lo", and removes 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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Notes
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-----
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I decided to place this in contrib as it needs further testing, but hopefully,
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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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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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