In psql, define the function:
CREATE OR REPLACE FUNCTION db_to_csv(path TEXT) RETURNS void AS $$
declare
tables RECORD;
statement TEXT;
begin
FOR tables IN
SELECT (table_schema || '.' || table_name) AS schema_table
FROM information_schema.tables t INNER JOIN information_schema.schemata s
ON s.schema_name = t.table_schema
WHERE t.table_schema NOT IN ('pg_catalog', 'information_schema', 'configuration')
ORDER BY schema_table
LOOP
statement := 'COPY ' || tables.schema_table || ' TO ''' || path || '/' || tables.schema_table || '.csv' ||''' DELIMITER '','' CSV HEADER';
EXECUTE statement;
END LOOP;
return;
end;
$$ LANGUAGE plpgsql;
The function is used as follows:
SELECT db_to_csv('/home/user/dir');
Found on the following SO question: http://stackoverflow.com/questions/17463299/export-database-into-csv-file