因此，我正在编写一个使用大约 10 种不同选择填充表格的过程。作为该过程的一部分，我收集了一些东西，但是在执行 INSERT/SELECT 时，我有时会遇到一些不一致的行为。当我单独运行选择查询时，我会在 10 秒内得到结果（在我刷新缓冲区缓存和 shared_pool 之后），但是一旦我在插入部分上标记，需要 10 多分钟......
这是我清除表格后我正在做的事情......在插入上添加了“附加”提示，这似乎在本周早些时候有很大帮助，但现在它恢复到比平时更长的时间，但仅在执行插入时！！
--// Disable GL_JLOG_DETAILS INDEXES
Execute immediate 'alter index IDX_GLDTL1 unusable';
Execute immediate 'alter index IDX_GLDTL2 unusable';
--// SECTION 1
INSERT /*+ APPEND PARALLEL(6) */ INTO GL_JLOG_DETAILS ( MAT_SECTION
,JLOG_KEY
,SRC_CD
,SRC_KEY
,CASE_KEY
,CASE_MBR_KEY
,UNALLOC_ACCT_CD
,FDRT_KEY
,FDRT_TR_CD
,TR_CD
,TR_REF_NO
,STAT_CD
,FD_DESC_ID
,FD_NO
,FD_TYP_CD
,BKT_NO
,RVSL_CD
,CO_CD
,BEN_RPT_TYP_CD
,DB_CR_CD
,ACCT_NO
,SUB_ACCT_NO
,JRNL_AMT
,TDTL_AMT
,RVSL_ERROR
,RVSL_SAME_DAY
,TDTL_REF_KEY)
---// SECTION 1 //--------
Select /*+ USE_NL(TMAP,TMOV,ACCT,SBNT,BNTP,FDRT) */ '1' MAT_SECTION,
JLOG.JLOG_KEY,
JLOG.SRC_CD,
TDTL.TDTL_KEY AS SRC_KEY,
TDTL.CASE_KEY,
TDTL.CASE_MBR_KEY,
TDTL.UNALLOC_ACCT_CD,
TDTL.FDRT_KEY,
FDRT.TR_CD FDRT_TR_CD,
TDTL.TR_CD,
TDTL.TR_REF_NO,
TDTL.STAT_CD,
TDTL.FD_DESC_ID,
TDTL.FD_NO,
FDDC.FD_TYP_CD,
TDTL.BKT_NO,
JLOG.RVSL_CD,
BNTP.CO_CD,
SBNT.BEN_RPT_TYP_CD,
JLOG.DB_CR_CD,
ACCT.ACCT_NO,
ACCT.SUB_ACCT_NO,
JLOG.JRNL_AMT,
ABS (TDTL.AMT) AS TDTL_AMT,
CASE
WHEN TDTL.PROC_DT < TDTL.RVSL_CYC_DT AND TDTL.ORIG_INBS_KEY IS NULL
THEN
1
ELSE
0
END RVSL_ERROR,
CASE
WHEN TDTL.PROC_DT = TDTL.RVSL_CYC_DT AND NOT TDTL.TR_CD IN ('3002','3004','1501','1502','1503','1504','1505')
THEN 1
ELSE 0
END RVSL_SAME_DAY,
TDTL.REF_KEY TDTL_REF_KEY
from GL_JOURNAL_LOGS JLOG,
Transact_Details TDTL,
FUND_DESC FDDC,
FD_RATES FDRT,
BEN_TYPES BNTP,
SYS_BEN_TYPES SBNT,
LEDGER_ACCOUNTS ACCT,
TRANS_MAP_OVRD TMOV,
TRANSACTION_MAP TMAP
WHERE JLOG.JRNL_CD = '0'
AND JLOG.SRC_CD = '2'
AND JLOG.MKEY_FD_NUM <> 0
AND NVL(JLOG.TMOV_KEY, -1) > 0
AND NVL(JLOG.ORIG_SCAT_KEY, 1) = 1
AND JLOG.Scat_key = TDTL.SCAT_KEY
AND JLOG.TR_CD = TDTL.TR_CD
AND JLOG.CASE_KEY = TDTL.CASE_KEY
AND JLOG.TR_REF_NO = TDTL.TR_REF_NO
AND JLOG.ACCT_KEY = ACCT.ACCT_KEY
AND JLOG.TMOV_KEY = TMOV.TMOV_KEY
AND NVL(TDTL.ORIG_SCAT_KEY, 1) = 1
AND TDTL.STAT_CD <> '4'
AND TDTL.FD_DESC_ID = FDDC.FD_DESC_ID
AND TDTL.FDRT_KEY = FDRT.FDRT_KEY
AND BNTP.BNTP_KEY = FDRT.BNTP_KEY
AND BNTP.SBNT_KEY (+) = SBNT.SBNT_KEY
AND TMOV.TMAP_KEY = TMAP.TMAP_KEY
AND TMOV.CO_CD = BNTP.CO_CD
AND DECODE(FDDC.MKEY_FD_NUM, NULL, TMAP.MKEY_FD_NUM, FDDC.MKEY_FD_NUM) = TMAP.MKEY_FD_NUM;
任何提示/建议将不胜感激！
解释计划
Plan hash value: 4157721082
-----------------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
-----------------------------------------------------------------------------------------------------------
| 0 | INSERT STATEMENT | | 1 | 212 | 1596 (1)| 00:00:20 |
| 1 | LOAD AS SELECT | GL_JLOG_DETAILS | | | | |
| 2 | NESTED LOOPS | | | | | |
| 3 | NESTED LOOPS | | 1 | 212 | 1596 (1)| 00:00:20 |
| 4 | NESTED LOOPS | | 1 | 195 | 1595 (1)| 00:00:20 |
| 5 | NESTED LOOPS | | 1 | 190 | 1594 (1)| 00:00:20 |
| 6 | NESTED LOOPS | | 12 | 2172 | 1582 (1)| 00:00:19 |
|* 7 | HASH JOIN | | 12 | 2004 | 1570 (1)| 00:00:19 |
| 8 | TABLE ACCESS FULL | FUND_DESC | 168 | 1176 | 4 (0)| 00:00:01 |
| 9 | NESTED LOOPS | | | | | |
| 10 | NESTED LOOPS | | 257 | 41120 | 1566 (1)| 00:00:19 |
| 11 | NESTED LOOPS | | 257 | 22359 | 537 (0)| 00:00:07 |
| 12 | NESTED LOOPS | | 257 | 20817 | 280 (0)| 00:00:04 |
|* 13 | TABLE ACCESS BY INDEX ROWID| GL_JOURNAL_LOGS | 257 | 18504 | 23 (0)| 00:00:01 |
|* 14 | INDEX RANGE SCAN | IDX_ORIGSCATKEY | 690 | | 4 (0)| 00:00:01 |
| 15 | TABLE ACCESS BY INDEX ROWID| TRANS_MAP_OVRD | 1 | 9 | 1 (0)| 00:00:01 |
|* 16 | INDEX UNIQUE SCAN | TMOV_PK | 1 | | 0 (0)| 00:00:01 |
| 17 | TABLE ACCESS BY INDEX ROWID | TRANSACTION_MAP | 1 | 6 | 1 (0)| 00:00:01 |
|* 18 | INDEX UNIQUE SCAN | TMAP_PK | 1 | | 0 (0)| 00:00:01 |
|* 19 | INDEX RANGE SCAN | IX_AML8890 | 3 | | 3 (0)| 00:00:01 |
|* 20 | TABLE ACCESS BY INDEX ROWID | TRANSACT_DETAILS | 1 | 73 | 4 (0)| 00:00:01 |
| 21 | TABLE ACCESS BY INDEX ROWID | FD_RATES | 1 | 14 | 1 (0)| 00:00:01 |
|* 22 | INDEX UNIQUE SCAN | FDRT_PK | 1 | | 0 (0)| 00:00:01 |
|* 23 | TABLE ACCESS BY INDEX ROWID | BEN_TYPES | 1 | 9 | 1 (0)| 00:00:01 |
|* 24 | INDEX UNIQUE SCAN | BNTP_PK | 1 | | 0 (0)| 00:00:01 |
| 25 | TABLE ACCESS BY INDEX ROWID | SYS_BEN_TYPES | 1 | 5 | 1 (0)| 00:00:01 |
|* 26 | INDEX UNIQUE SCAN | SBNT_PK | 1 | | 0 (0)| 00:00:01 |
|* 27 | INDEX UNIQUE SCAN | ACCT_PK | 1 | | 0 (0)| 00:00:01 |
| 28 | TABLE ACCESS BY INDEX ROWID | LEDGER_ACCOUNTS | 1 | 17 | 1 (0)| 00:00:01 |
-----------------------------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
7 - access("TDTL"."FD_DESC_ID"="FDDC"."FD_DESC_ID")
filter("TMAP"."MKEY_FD_NUM"=DECODE(TO_CHAR("FDDC"."MKEY_FD_NUM"),NULL,"TMAP"."MKEY_FD_NUM","
FDDC"."MKEY_FD_NUM"))
13 - filter("JLOG"."TMOV_KEY" IS NOT NULL AND "JLOG"."SRC_CD"='2' AND "JLOG"."MKEY_FD_NUM"<>0
AND NVL("TMOV_KEY",(-1))>0 AND "JLOG"."JRNL_CD"='0')
14 - access(NVL("ORIG_SCAT_KEY",1)=1)
16 - access("JLOG"."TMOV_KEY"="TMOV"."TMOV_KEY")
18 - access("TMOV"."TMAP_KEY"="TMAP"."TMAP_KEY")
19 - access("JLOG"."SCAT_KEY"="TDTL"."SCAT_KEY" AND "JLOG"."CASE_KEY"="TDTL"."CASE_KEY")
filter("TDTL"."FD_DESC_ID" IS NOT NULL AND "TDTL"."STAT_CD"<>'4' AND
"JLOG"."CASE_KEY"="TDTL"."CASE_KEY")
20 - filter("TDTL"."FDRT_KEY" IS NOT NULL AND NVL("TDTL"."ORIG_SCAT_KEY",1)=1 AND
"JLOG"."TR_CD"="TDTL"."TR_CD" AND "JLOG"."TR_REF_NO"="TDTL"."TR_REF_NO")
22 - access("TDTL"."FDRT_KEY"="FDRT"."FDRT_KEY")
23 - filter("TMOV"."CO_CD"="BNTP"."CO_CD")
24 - access("BNTP"."BNTP_KEY"="FDRT"."BNTP_KEY")
26 - access("BNTP"."SBNT_KEY"="SBNT"."SBNT_KEY")
27 - access("JLOG"."ACCT_KEY"="ACCT"."ACCT_KEY")