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47 lines
1.4 KiB
Plaintext
47 lines
1.4 KiB
Plaintext
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Thu Mar 24 17:25:48 CET 2005
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----------------------------
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This module and associated pl/pgsql functions have been implemented
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to provide long locking support required by Web Feature Service
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specification (https://portal.opengeospatial.org/files/?artifact_id=7176)
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It is based on original work by David Blasby <dblasby@openplans.org>
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and has been modified and packaged by Sandro Santilli <strk@refractions.net>.
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Usage:
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-- Enable long transaction support
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SELECT EnableLongTransactions();
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-- Disable long transaction support
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SELECT DisableLongTransactions();
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-- Check updates and deletes of rows in
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-- given table for being authorized.
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-- Identify rows using <column> value.
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SELECT CheckAuth([<schema>], <table>, <column>)
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-- Set lock/authorization for specific row in table
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-- <authid> is a text value, <expires> is a timestamp
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-- defaulting to now()+1hour.
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-- Returns 1 if lock has been assigned, 0 otherwise
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-- (already locked by other auth)
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SELECT LockRow([<schema>], <table>, <rowid>, <authid>, [<expires>])
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-- Remove all locks held by specified authorization id.
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-- Returns the number of locks released.
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SELECT UnlockRows(<authid>)
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-- Add an authorization token to be used in current
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-- transaction.
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SELECT AddAuth(<authid>)
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WARNING! users must use serializable transaction level
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(see http://www.postgresql.org/docs/7.4/static/transaction-iso.html)
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otherwise locking mechanism would break
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--strk;
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