es | Cost (%CPU)| Time |
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| 0 | SELECT STATEMENT | | 2121K| 40M| 3644 (2)| 00:00:44 |
|* 1 | TABLE ACCESS FULL| TT | 2121K| 40M| 3644 (2)| 00:00:44 |
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Predicate Information (identified by operation id):
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1 - filter("ID"=1)
Note
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- dynamic sampling used for this statement (level=2)
看到了吧，此时是全表扫描读取，数据库是很聪明的吧！
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