Convert tables in a SQL database to individual CSVs

database_tables_to_csv.sql

/* 
1. Log in to psql as a superuser
2. CHMOD target directory to 777
3. Execute via SELECT db_to_csv('/path/to/output');
4. Use complete file path.
*/

CREATE OR REPLACE FUNCTION db_to_csv(path TEXT) RETURNS void AS $$
declare
   tables RECORD;
   statement TEXT;
begin
FOR tables IN
   SELECT (table_schema || '.' || table_name) AS schema_table
   FROM information_schema.tables t INNER JOIN information_schema.schemata s
   ON s.schema_name = t.table_schema
   WHERE t.table_schema NOT IN ('pg_catalog', 'information_schema')
   AND t.table_type NOT IN ('VIEW')
   ORDER BY schema_table
LOOP
   statement := 'COPY ' || tables.schema_table || ' TO ''' || path || '/' || tables.schema_table || '.csv' ||''' DELIMITER '';'' CSV HEADER';
   EXECUTE statement;
END LOOP;
return;
end;
$$ LANGUAGE plpgsql;