Here is a patch to complete the implementation of CREATE COLLATION IF
NOT EXISTS. The meat of this was already implemented for
pg_import_system_collations; this just exposes it in the SQL command.
If we go ahead with ICU, then creating collations by hand will become
more common, so this could be useful in practice.
--
Peter Eisentraut http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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