How does the SQL database always have physical reads through indexes? (2) _ MySQL

SQL database indexing how to always have physical reads (2) bitsCN.com 0 0 12 0
05 Fetch 2 0.00 0.00 0 1 0 1
06 -----------------------------------------------------------------------
07 total 4 0.79 0.90 0 1 12 1
08
09 Misses in library cache during parse: 1
10 Optimizer mode: ALL_ROWS
11 Parsing user id: 64
12
13 Rows Row Source Operation
14 ----------------------------------------------------------
15 1 SORT AGGREGATE
16 0 FILTER
17 0 index range scan IND_T_PREBM4 (object id 38674)
18
19 Elapsed times include waiting on following events:
20 Event waited on Times Max. Wait Total Waited
21 ---------------------------------------- Waited ----------------------
22 direct path write 1 0.00 0.00
23 SQL * Net message to client 2 0.00 0.00
24 SQL * Net message from client 2 27.20 27.22
1 insert into sys. fga_log $ (sessionid, timestamp #, dbuid, osuid, obj $ schema, obj $ name,
2 policynbitsCN.com