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|? 0 | SELECT STATEMENT? ? ? ? ? ? ? ? ? ? ? ? |? ? ? |? ? 19 |? 798 |? ? 16? (7)| 00:00:01 |? ? ? |? ? ? |
|*? 1 |? CONNECT BY NO FILTERING WITH START-WITH|? ? ? |? ? ? |? ? ? |? ? ? ? ? ? |? ? ? ? ? |? ? ? |? ? ? |
|? 2 |? PARTITION LIST ALL? ? ? ? ? ? ? ? ? ? |? ? ? |? ? 19 |? 285 |? ? 15? (0)| 00:00:01 |? ? 1 |? ? 9 |
|? 3 |? ? TABLE ACCESS FULL? ? ? ? ? ? ? ? ? ? | TEST |? ? 19 |? 285 |? ? 15? (0)| 00:00:01 |? ? 1 |? ? 9 |
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Predicate Information (identified by operation id):
---------------------------------------------------
? 1 - access("T"."PARENT_ID"=PRIOR "T"."ID" AND PRIOR "T"."CODE"='0306')
? ? ? filter("T"."ID"=12)
统计信息
----------------------------------------------------------
? ? ? ? ? 1? recursive calls
? ? ? ? ? 0? db block gets
? ? ? ? 55? consistent gets
? ? ? ? ? 0? physical reads
? ? ? ? ? 0? redo size
? ? ? ? 557? bytes sent via SQL*Net to client
? ? ? ? 360? bytes received via SQL*Net from client
? ? ? ? ? 2? SQL*Net roundtrips to/from client
? ? ? ? ? 2? sorts (memory)
? ? ? ? ? 0? sorts (disk)
? ? ? ? ? 2? rows processed
只有下面的写法才能用到分区，可以看到t.code = '0306'是关键
SQL> select * from test t
? ? start with (t.id = 12
? ? ? ? ? ? and t.code = '0306')
? ? connect by prior t.id = t.parent_id
? ? ? ? ? ? and t.code = '0306';
执行计划
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Plan hash value: 3571852076
| Id? | Operation? ? ? ? ? ? ? ? ? ? ? ? ? | Name? ? ? ? | Rows? | Bytes | Cost (%CPU)| Time? ? | Pstart| Pstop |
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|? 0 | SELECT STATEMENT? ? ? ? ? ? ? ? ? ? |? ? ? ? ? ? ? |? ? 2 |? ? 84 |? ? 9? (34)| 00:00:01 |? ? |? ? ? ? ? |
|*? 1 |? CONNECT BY WITH FILTERING? ? ? ? ? |? ? ? ? ? ? ? |? ? ? |? ? ? |? ? ? ? ? ? |? ? ? ? ? |? ? |? ? ? ? ? |
|*? 2 |? TABLE ACCESS BY GLOBAL INDEX ROWID| TEST? ? ? ? |? ? 1 |? ? 15 |? ? 1? (0)| 00:00:01 |? 6 |? ? ? ? 6 |
|*? 3 |? ? INDEX UNIQUE SCAN? ? ? ? ? ? ? ? | SYS_C0010758 |? ? 1 |? ? ? |? ? 0? (0)| 00:00:01 |? ? |? ? ? ? ? |
|*? 4 |? HASH JOIN? ? ? ? ? ? ? ? ? ? ? ? |? ? ? ? ? ? ? |? ? 1 |? ? 28 |? ? 6? (17)| 00:00:01 |? ? |? ? ? ? ? |
|? 5 |? ? CONNECT BY PUMP? ? ? ? ? ? ? ? ? |? ? ? ? ? ? ? |? ? ? |? ? ? |? ? ? ? ? ? |? ? ? ? ? |? ? |? ? ? ? ? |
|? 6 |? ? PARTITION LIST SINGLE? ? ? ? ? ? |? ? ? ? ? ? ? |? ? 2 |? ? 30 |? ? 4? (0)| 00:00:01 |? KEY |? KEY |
|? 7 |? ? TABLE ACCESS FULL? ? ? ? ? ? ? | TEST? ? ? ? |? ? 2 |? ? 30 |? ? 4? (0)| 00:00:01 |? 6 |? ? ? ? 6 |
--------------------------------------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
? 1 - access("T"."PARENT_ID"=PRIOR "T"."ID")
? ? ? filter("T"."CODE"='0306')
? 2 - filter("T"."CODE"='0306')
? 3 - access("T"."ID"=12)
? 4 - access("connect$_by$_pump$_002"."prior t.id "="T"."PARENT_ID")
统计信息
----------------------------------------------------------
? ? ? ? ? 0? recursive calls
? ? ? ? ? 0? db block gets
? ? ? ? 16? consistent gets
? ? ? ? ? 0? physical reads
? ? ? ? ? 0? redo size
? ? ? ? 557? bytes sent via SQL*Net to client
? ? ? ? 360? bytes received via SQL*Net from client
? ? ? ? ? 2? SQL*Net roundtrips to/from client
? ? ? ? ? 4? sorts (memory)
? ? ? ? ? 0? sorts (disk)
? ? ? ? ? 2? rows processed
SQL> select t.*, prior id, prior parent_