GV$CLASS_PING

select
0,                       -- INST_ID NUMBER
'data block',            -- CLASS CHAR(10)
0,                       -- X_2_NULL NUMBER
0,                       -- X_2_NULL_FORCED_WRITE NUMBER
0,                       -- X_2_NULL_FORCED_STALE NUMBER
0,                       -- X_2_S NUMBER
0,                       -- X_2_S_FORCED_WRITE NUMBER
0,                       -- X_2_SSX NUMBER
0,                       -- X_2_SSX_FORCED_WRITE NUMBER
0,                       -- S_2_NULL NUMBER
0,                       -- S_2_NULL_FORCED_STALE NUMBER
0,                       -- SS_2_NULL NUMBER
0,                       -- SS_2_RLS NUMBER
0,                       -- OP_2_SS NUMBER
0,                       -- NULL_2_X NUMBER
0,                       -- S_2_X NUMBER
0,                       -- SSX_2_X NUMBER
0,                       -- NULL_2_S NUMBER
0                        -- NULL_2_SS NUMBER
from
dual
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