Convert a PostgreSQL database from SQL_ASCII to UTF8 encoding

gistfile1.sh

# convert createdb's template to UTF8
echo "UPDATE pg_database SET datistemplate = FALSE WHERE datname = 'template1';" | psql -U postgres
echo "drop database template1;" | psql -U postgres
echo "create database template1 with template = template0 encoding = 'UTF8';" | psql -U postgres
echo "update pg_database set datacl='{=c/postgres,postgres=CTc/postgres}' where datname='template1';" | psql -U postgres
echo "UPDATE pg_database SET datistemplate = TRUE WHERE datname = 'template1';" | psql -U postgres

# export and reimport as UTF8
pg_dump -U uniiverse --encoding utf8 mydatabase -f mydatabase_utf8.sql
createdb -U postgres -E utf8 mydatabase_utf8
psql -U postgres -f mydatabase_utf8.sql -d mydatabase_utf8
echo "ALTER DATABASE mydatabase RENAME TO mydatabase_ascii" | psql -U postgres
echo "ALTER DATABASE mydatabase_utf8 RENAME TO mydatabase" | psql -U postgres