> Are arrays in PostgreSQL like associative arrays in Oracle PL/SQL hash > tables?, that is an > association between key & values? where the integer indexes stand in reality > for keys?
No, arrays in PostgreSQL are just arrays. You can consider the position like a special case of key.. but it is not, because it is just a position and cannot be set. For key value you can consider hstore: http://www.postgresql.org/docs/9.3/static/hstore.html Or build your own multi dimension array.
