The CHANGE command alters the name-to-region or region-to-segment mapping and /or the environment for a region or segment.

The format of the CHANGE command is:

C[HANGE]-N[AME] name-space -R[EGION]=new-region
C[HANGE]-R[EGION] region-name [-REGION-qualifier...]
C[HANGE]-S[EGMENT] segment-name [-SEGMENT-qualifier...]

The CHANGE command requires specification of an object-type and object-name.

Once you exit GDE, mapping changes take effect for any subsequent image activation (for example, the next RUN or the mumps -direct command). Changes to database parameters only take effect for new database files created with subsequent MUPIP CREATE commands that use the modified Global Directory. Use the MUPIP SET command (or in some cases DSE) to change characteristics of existing database files.

Example:

GDE> change -region master -dynamic=temp -key=100

This command changes the region master to use the segment temp and establishes a maximum KEY_SIZE of 100 characters for the next creation of a file for this region. The segment change takes effect the first time the system uses the Global Directory after the GDE session EXITs, while the KEY_SIZE change takes effect after the next MUPIP CREATE that creates a new database file for segment temp.