Postgres database functions for Qilletni.
| Connection | A connection object. |
| Database | An entity for interacting with a PostgreSQL database. |
| PreparedStatement | An entity for holding a single prepared statement. |
| Result | The result of a database operation that retrieves data. |
| ResultMetadata | Column metadata for the result of a query. |
| ResultSet | A set of results from a database query. |