The REBUILDSCOPE option allows you to specify a SCOPE option for all REBUILD command statements in the SYSIN.
If you do not specify a REBUILDSCOPE setting on the OPTIONS command, SCOPE ALL is the default option for all REBUILD requests.
The REBUILDSCOPE option settings are ALL, PENDING, and STATUS (status1, status2,…). For more information about these settings, see SCOPE-specification-for-REBUILD-INDEX.