GV$SQL_FEATURE_HIERARCHY definition in Oracle Database 11.2
GV$SQL_FEATURE_HIERARCHY

select
  INST_ID,                                 -- INST_ID NUMBER
  ID_QKSFMPRTSYROW,                        -- SQL_FEATURE VARCHAR2(64)
  PID_QKSFMPRTSYROW                        -- PARENT_ID VARCHAR2(64)
from
  x$qksfmprt
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