Oracle 不使用索引的原因有哪些?(二)

2014-11-24 17:28:17 · 作者: · 浏览: 1
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| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time | Pstart| Pstop |
---------------------------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 13 | 494 | 6 (0)| 00:00:01 | | |
| 1 | PARTITION RANGE ALL | | 13 | 494 | 6 (0)| 00:00:01 | 1 | 4 |
| 2 | TABLE ACCESS BY LOCAL INDEX ROWID| EMP | 13 | 494 | 6 (0)| 00:00:01 | 1 | 4 |
|* 3 | INDEX FULL SCAN | EMP_IDX1 | 13 | | 3 (0)| 00:00:01 | 1 | 4 |
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Predicate Information (identified by operation id):
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3 - filter("EMPNO"<>7900)


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