Good Explain plan long execution.

Question

Hi,
on 11.2.0.3 for a query I have following explain plan which sounds good but when executed by an application it does not finish.
It waits on db file scattered read. Thanks for your ideas.
| Id  | Operation                     | Name              | Rows  | Bytes | Cost (%CPU)| Time     |
|   0 | INSERT STATEMENT              |                   |     1 |   427 |     2   (0)| 00:00:01 |
|   1 |  LOAD TABLE CONVENTIONAL      | PS_PC_RT_RUN_TA24 |       |       |            |          |
|*  2 |   FILTER                      |                   |       |       |            |          |
|   3 |    TABLE ACCESS BY INDEX ROWID| PS_PRT_PRICE4     |     1 |   427 |     0   (0)| 00:00:01 |
|*  4 |     INDEX RANGE SCAN          | PSAPRT_PRICE4     |     1 |       |     0   (0)| 00:00:01 |
|*  5 |    TABLE ACCESS FULL          | PS_PC_RT_RUN_TA24 |     1 |    57 |     2   (0)| 00:00:01 |
Query Block Name / Object Alias (identified by operation id):
   1 - SEL$1
   3 - SEL$1 / PRT@SEL$1
   4 - SEL$1 / PRT@SEL$1
   5 - SEL$2 / A@SEL$2
Predicate Information (identified by operation id):
   2 - filter( NOT EXISTS (SELECT 0 FROM "PS_PC_RT_RUN_TA24" "A" WHERE
              "A"."BUSINESS_UNIT"=:B1 AND "A"."PROJECT_ID"=:B2 AND "A"."ACTIVITY_ID"=:B3 AND
              "A"."RESOURCE_ID"=:B4 AND "A"."PROCESS_INSTANCE"=2690469))
   4 - access("PRT"."PROCESS_INSTANCE"=2690469)
   5 - filter("A"."BUSINESS_UNIT"=:B1 AND "A"."PROJECT_ID"=:B2 AND "A"."ACTIVITY_ID"=:B3
              AND "A"."RESOURCE_ID"=:B4 AND "A"."PROCESS_INSTANCE"=2690469)
SQL> show parameter optimizer
NAME                                 TYPE        VALUE
optimizer_capture_sql_plan_baselines boolean     FALSE
optimizer_dynamic_sampling           integer     2
optimizer_features_enable            string      11.2.0.3
optimizer_index_caching              integer 0
optimizer_index_cost_adj             integer     100
optimizer_mode                       string      ALL_ROWS
optimizer_secure_view_merging        boolean     TRUE
optimizer_use_invisible_indexes      boolean     FALSE
optimizer_use_pending_statistics     boolean FALSE
  optimizer_use_sql_plan_baselines     boolean TRUE

Answer 1

many thanks Nicolas,
yes it is the famous standard PC_Pricing on step PC_PRICING.COPYTA2.Step01.S.
The query is :
INSERT INTO PS_PC_RT_RUN_TA24 (PROCESS_INSTANCE, BUSINESS_UNIT, PROJECT_ID, ACTIVITY_ID, RESOURCE_ID, LINE_NO, SEQ_NUM, RESOURCE_ID_FROM, ANALYSIS_TYPE, RESOURCE_TYPE, RESOURCE_CATEGORY, RESOURCE_SUB_CAT, CONTRACT_NUM, CONTRACT_LINE_NUM, RESOURCE_QUANTITY, FOREIGN_AMOUNT, RATE_OPTION, RATE_AMT, AMOUNT, TRANS_DT, ACCOUNTING_DT, INFO_FLD1, INFO_FLD2, EMPLID, TIME_RPTG_CD, JOBCODE, UOM_BILL, UNIT_OF_MEASURE, UNIT_AMT, FOREIGN_CURRENCY, RT_TYPE, OPRID, OVERRIDE_SRC, SRC_AN_TYPE, SRC_RES_CATEGORY, SRC_RES_SUB_CAT, SRC_RES_TYPE, TO_CUR, BUSINESS_UNIT_GL, ACCOUNT, ALTACCT, DEPTID, OPERATING_UNIT, PRODUCT, FUND_CODE, CLASS_FLD, PROGRAM_CODE, BUDGET_REF, AFFILIATE, AFFILIATE_INTRA1, AFFILIATE_INTRA2, CHARTFIELD1, CHARTFIELD2, CHARTFIELD3, SYSTEM_SOURCE, PROCESS_STATUS, BI_DISTRIB_STATUS, RATE_PLAN, DESCR, DESCR1, PROJ_ROLE, TIER_PRICE_SW, PRICED_RATE, RATE_MULT, RATE_DIV, CST_DISTRIB_STATUS, REV_DISTRIB_STATUS, RATE_DEF_TYPE, BUSINESS_UNIT_WO, WO_ID, WO_TASK_ID, RSRC_TYPE, RES_LN_NBR, PC_TEMPLATE_ID, COMBO_STATUS, COST_RATE, BILL_RATE, TEMPLATE_TYPE, RATE_PLAN_TYPE, RATE_DEF_BIL, RATE_DEF_COST, RATE_DEF_REV) SELECT PRT.PROCESS_INSTANCE, PRT.BUSINESS_UNIT, PRT.PROJECT_ID, PRT.ACTIVITY_ID, PRT.RESOURCE_ID, 1, 0, PRT.RESOURCE_ID, PRT.ANALYSIS_TYPE, PRT.RESOURCE_TYPE, PRT.RESOURCE_CATEGORY, PRT.RESOURCE_SUB_CAT, PRT.CONTRACT_NUM, PRT.CONTRACT_LINE_NUM, PRT.RESOURCE_QUANTITY, PRT.FOREIGN_AMOUNT, ' ', 0, 0, PRT.TRANS_DT, PRT.ACCOUNTING_DT, ' ', ' ', PRT.EMPLID, PRT.TIME_RPTG_CD, PRT.JOBCODE, ' ', PRT.UNIT_OF_MEASURE, 0, PRT.FOREIGN_CURRENCY, PRT.RT_TYPE, PRT.OPRID, 'N', ' ', ' ', ' ', ' ', ' ', PRT.BUSINESS_UNIT_GL, PRT.ACCOUNT, PRT.ALTACCT, PRT.DEPTID, PRT.OPERATING_UNIT, PRT.PRODUCT, PRT.FUND_CODE, PRT.CLASS_FLD, PRT.PROGRAM_CODE, PRT.BUDGET_REF, PRT.AFFILIATE, PRT.AFFILIATE_INTRA1, PRT.AFFILIATE_INTRA2, PRT.CHARTFIELD1, PRT.CHARTFIELD2, PRT.CHARTFIELD3, PRT.SYSTEM_SOURCE, PRT.PROCESS_STATUS, PRT.BI_DISTRIB_STATUS, PRT.RATE_PLAN, PRT.DESCR, ' ', PRT.PROJ_ROLE, PRT.TIER_PRICE_SW, PRT.PRICED_RATE, PRT.RATE_MULT, PRT.RATE_DIV, PRT.CST_DISTRIB_STATUS, PRT.REV_DISTRIB_STATUS, PRT.RATE_DEF_TYPE, PRT.BUSINESS_UNIT_WO, PRT.WO_ID, PRT.WO_TASK_ID, PRT.RSRC_TYPE, PRT.RES_LN_NBR, PRT.PC_TEMPLATE_ID, ' ', 0, 0, PRT.TEMPLATE_TYPE, PRT.RATE_PLAN_TYPE, PRT.RATE_DEF_BIL, PRT.RATE_DEF_COST, PRT.RATE_DEF_REV FROM PS_PRT_PRICE4 PRT WHERE PRT.PROCESS_INSTANCE = 2690469 AND NOT EXISTS ( SELECT 'X' FROM PS_PC_RT_RUN_TA24 A
WHERE A.BUSINESS_UNIT = PRT.BUSINESS_UNIT AND A.PROJECT_ID = PRT.PROJECT_ID AND A.ACTIVITY_ID = PRT.ACTIVITY_ID AND A.RESOURCE_ID = PRT.RESOURCE_ID AND A.PROCESS_INSTANCE = 2690469)
====================End of query=================================
Best regards.