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PostgreSQL Upgrading
# Taken from http://robots.thoughtbot.com/post/33706558963/migrating-data-from-an-upgraded-postgres
#
# Note: these steps assume installation with Homebrew.
# Initialize a new database, adding a .new suffix to the directory that Homebrew recommends.
initdb /usr/local/var/postgres.new -E utf8
# Run the upgrade script, providing the correct paths for the various flags.
pg_upgrade \
-b /usr/local/Cellar/postgresql/9.1.4/bin \
-B /usr/local/Cellar/postgresql/9.2.1/bin \
-d /usr/local/var/postgres \
-D /usr/local/var/postgres.new
# Put the data in the correct place.
rm -rf /usr/local/var/postgres
mv /usr/local/var/postgres.new /usr/local/var/postgres
# If you’ve set up launchd to run Postgres automatically,
# everything should be up and running! Otherwise, check out the
# documentation with brew info postgres to read how to have OS X
# manage postgres for you.
#######
# Alternatively, if you’ve just upgraded Postgres with Homebrew and
# Postgres won’t start, as long as you don’t care about any data stored locally:
brew remove --force postgresql
rm -rf /usr/local/var/postgres/
brew install postgresql
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