----------  Rename  ----------

This command renames a table or an attribute.

Syntax:

     rename | table TABLE_NAME [|to|] NEW_TABLE_NAME           |;
            |                   |as|                           |
            |                                                  |
            | attr[ibute] TABLE.ATTR_NAME [|to|] NEW_ATTR_NAME |
            |                              |as|                |

NEW_TABLE_NAME and NEW_ATTR_NAME must not conflict with existing names.

Note that when specifying TABLE.ATTR_NAME, the attribute must be qualified  by
its table name. Also the keyword 'attr' or 'attribute' must be given.
