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Undocumented but likely finds information related to database links used for materialized view replication
snaptab IN sys.dbms_utility.uncl_array,
cuser IN VARCHAR2,
snpcnt IN OUT BINARY_INTEGER,
owner IN OUT sys.SYS dbms_utility.name_array,
sname IN OUT sys.dbms_utility.name_array,
stab IN OUT sys.dbms_utility.name_array,
stype IN OUT sys.dbms_utility.number_array,
uslog IN OUT sys.dbms_utility.name_array,
truemethod IN OUT VARCHAR2,
dblink IN OUT sys.dbms_utility.dblink_array,
aws IN OUT sys.dbms_utility.number_array);