----------  Lock Level  ----------

Locking maintains database integrity by controlling the concurrent access  al-
lowed  on  a  table.  The LOCK LEVEL command changes the level of locking on a
table.  The most recent locking level remains in force until a subsequent lock
level command is issued.

Syntax:

     lock level [on] TABLE [is] | table        |;
                                | group  [(n)] |
                                | record [(n)] |
                                | null         |

Table-level locking locks the entire table for  the  duration  of  each  Query
Language  command.   Group-level  locking locks only those records accessed by
the current Query Language command.  Record-level  locking  locks  the  record
currently  being  processed  by  the Query Language command.  All locking on a
table is removed by specifying 'null'.
