| db_add_index | includes/database/database.inc | Add an index. |
| db_add_primary_key | includes/database/database.inc | Add a primary key. |
| db_add_unique_key | includes/database/database.inc | Add a unique key. |
| db_change_field | includes/database/database.inc | |
| db_drop_index | includes/database/database.inc | Drop an index. |
| db_drop_primary_key | includes/database/database.inc | Drop the primary key. |
| db_drop_unique_key | includes/database/database.inc | Drop a unique key. |
| db_table_exists | includes/database/database.inc | Check if a table exists. |
| system_update_6043 | modules/system/system.install | Update table indices to make them more rational and useful. |
| variable_set | includes/bootstrap.inc | Set a persistent variable. |
