¿Cómo modificar una actualización en Oracle para que funcione más rápido?

8

Tengo esta consulta:

UPDATE   (
    SELECT   h.valid_through_dt, h.LAST_UPDATE_TMSTMP
    FROM   ETL_FEE_SCH_TMP d, FEE_SCHEDULE_HISTORICAL h
    WHERE       h.FUND_ID = d.FUND_ID
    AND h.FEETYPE_NAME = d.FEETYPE_NAME
    AND h.BREAKPOINT_TYPE = d.BREAKPOINT_TYPE
    AND h.BREAKPOINT_QTY = d.BREAKPOINT_QTY
    AND h.LOW_BREAKPOINT_AMT = d.LOW_BREAKPOINT_AMT
    AND h.VALID_THROUGH = TO_DATE ('31-DEC-9999', 'dd-mon-yyyy')
    AND h.universe = 'DC'
    AND h.universe = d.universe
    AND EXISTS
    (
        SELECT 1
        FROM FEE_SCHEDULE s
        WHERE s.FUND_ID = h.FUND_ID
        AND s.FEETYPE_NAME = h.FEETYPE_NAME
        AND s.BREAKPOINT_TYPE = h.BREAKPOINT_TYPE
        AND s.BREAKPOINT_QTY = h.BREAKPOINT_QTY
        AND s.LOW_BREAKPOINT_AMT = h.LOW_BREAKPOINT_AMT
        AND s.universe = 'DC'
    )
) updateTable
SET     updateTable.VALID_THROUGH = (SYSDATE - 1),
updateTable.LAST_UPDATE_TMSTMP = SYSTIMESTAMP;

El problema que tengo es que esta consulta tarda mucho tiempo en ejecutarse. No sé si es posible ejecutar esto en paralelo, o sería más fácil actualizar un cursor en una función de canalización.

¿Qué sugieres?

Esta es toda la información que creo que es relevante.

Este es el plan de ejecución de la selección interna:

Execution Plan
----------------------------------------------------------
Plan hash value: 57376096
---------------------------------------------------------------------------------------------------------
| Id  | Operation                    | Name                     | Rows  | Bytes| Cost (%CPU)| Time     |
---------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT             |                          |     1 |   306 |  8427   (1)| 00:01:42 |
|   1 |  NESTED LOOPS                |                          |       |       |            |          |
|   2 |   NESTED LOOPS               |                          |     1 |    306|  8427   (1)| 00:01:42 |
|   3 |    MERGE JOIN CARTESIAN      |                          |     1 |    192|  8426   (1)| 00:01:42 |
|*  4 |     INDEX RANGE SCAN         | SYS_C000666              |     1 |     96|     2   (0)| 00:00:01 |
|   5 |     BUFFER SORT              |                          |  3045K|   278M|  8425   (1)| 00:01:42 |
|   6 |      SORT UNIQUE             |                          |  3045K|   278M|  8425   (1)| 00:01:42 |
|*  7 |       TABLE ACCESS FULL      | FEE_SCHEDULE             |  3045K|   278M|  8425   (1)| 00:01:42 |
|*  8 |    INDEX RANGE SCAN          | FEE_SCHDL_IDX1           |     1 |       |     1   (0)| 00:00:01 |
|*  9 |   TABLE ACCESS BY INDEX ROWID| FEE_SCHEDULE_HISTORICAL  |     1 |   114 |     1   (0)| 00:00:01 |
---------------------------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
   4 - access("D"."UNIVERSE"='DC')
   7 - filter("S"."UNIVERSE"='DC')
   8 - access("H"."UNIVERSE"='DC' AND "S"."FUND_ID"="H"."FUND_ID" AND
              "S"."FEETYPE_NAME"="H"."FEETYPE_NAME" AND
              "S"."BREAKPOINT_TYPE"="H"."BREAKPOINT_TYPE" AND
              "S"."BREAKPOINT_QTY"="H"."BREAKPOINT_QTY" AND
              "S"."LOW_BREAKPOINT_AMT"="H"."LOW_BREAKPOINT_AMT")
       filter("H"."FUND_ID"="D"."FUND_ID" AND
              "H"."FEETYPE_NAME"="D"."FEETYPE_NAME" AND
              "H"."BREAKPOINT_TYPE"="D"."BREAKPOINT_UNIT_TY

Datos de la tabla:

---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
UNIVERSE|FUND_ID   |FEETYPE_NAME |BREAKPOINT_TYPE|BREAKPOINT_QTY|LOW_BREAKPOINT_AMT|HIGH_BREAKPOINT_AMT|FEE_PCT|FEE_SCHDL_SEQ_ID|GROUP_ID|LAST_UPDATE_TMSTMP  |VALID_FROM|VALID_THROUGH|INSERT_TMSTMP        |JOB_ID|
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
DC      |DC9ZTPLPHO|DeferLoad    |Percentage     |4             |10000             |300000             |3.14   |780250          |null    |1/4/2012  3:59:54 PM|6/23/2012 |12/31/9999   |1/5/2011   3:59:54 PM|666   |
DC      |DCE86Y8XFU|RedemptionFee|Percentage     |9             |  100             |100500             |7.67   |780251          |null    |6/4/2012  4:49:54 PM|11/12/2011|12/31/9999   |8/17/2011  2:00:54 PM|666   |
DC      |DCAYL0KONA|FrontLoad    |Percentage     |2             |50000             |601500             |5.00   |780252          |null    |4/25/2012 4:49:54 PM|8/2/2012  |12/31/9999   |12/19/2012 9:59:00 PM|666   |
DC      |DC9ZTPLPHO|DeferLoad    |Percentage     |7             |80000             |900000             |2.24   |780252          |null    |4/25/2012 4:49:54 PM|8/2/2012  |12/31/9999   |12/19/2012 9:59:00 PM|666   |
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Este es el guión de la tabla histórica:

CREATE TABLE FEE_SCHEDULE_HISTORICAL
(
  UNIVERSE                        VARCHAR2(2 BYTE) NOT NULL,
  FUND_ID                         VARCHAR2(10 BYTE) NOT NULL,
  FEETYPE_NAME                    VARCHAR2(75 BYTE),
  BREAKPOINT_TYPE                 VARCHAR2(50 BYTE),
  BREAKPOINT_QTY                  VARCHAR2(10 BYTE),
  LOW_BREAKPOINT_AMT              NUMBER(19,6),
  HIGH_BREAKPOINT_AMT             NUMBER(19,6),
  FEE_PCT                         NUMBER(19,6),
  FEE_SCHDL_SEQ_ID                NUMBER        NOT NULL,
  GROUP_ID                        NUMBER,
  LAST_UPDATE_TMSTMP              DATE          NOT NULL,
  VALID_FROM                      DATE          NOT NULL,
  VALID_THROUGH                   DATE          NOT NULL,
  INSERT_TMSTMP                   DATE          NOT NULL,
  JOB_ID                          NUMBER        NOT NULL
);

CREATE UNIQUE INDEX FEE_SCHDL_PK ON FEE_SCHEDULE_HISTORICAL(FEE_SCHDL_SEQ_ID);

CREATE UNIQUE INDEX FEE_SCHDL_HST_IDX ON FEE_SCHEDULE_HISTORICAL (
    UNIVERSE,
    FUND_ID,
    FEETYPE_NAME,
    BREAKPOINT_TYPE,
    BREAKPOINT_QTY, 
    LOW_BREAKPOINT_AMT,
    VALID_FROM,
    JOB_ID
)

CREATE INDEX FEE_SCHEDULE_HST_IDX2 ON FEE_SCHEDULE_HISTORICAL(LAST_UPDATE_TMSTMP)

CREATE INDEX FEE_SCHEDULE_HST_IDX3 ON FEE_SCHEDULE_HISTORICAL(VALID_THROUGH)

ALTER TABLE FEE_SCHEDULE_HISTORICAL ADD (
    CONSTRAINT FEE_SCHDL_PK
    PRIMARY KEY
    (FEE_SCHDL_SEQ_ID)
);

Esta es la otra tabla:

CREATE TABLE FEE_SCHEDULE
(
  UNIVERSE                        VARCHAR2(2 BYTE) NOT NULL,
  FUND_ID                         VARCHAR2(10 BYTE) NOT NULL,
  FEETYPE_NAME                    VARCHAR2(75 BYTE),
  BREAKPOINT_TYPE                 VARCHAR2(50 BYTE),
  BREAKPOINT_QTY                  VARCHAR2(10 BYTE),
  LOW_BREAKPOINT_AMT              NUMBER(19,6),
  HIGH_BREAKPOINT_AMT             NUMBER(19,6),
  FEE_PCT                         NUMBER(19,6),
  JOB_RUN_ID                      NUMBER        NOT NULL,
  FILE_DATE                       DATE          NOT NULL,
  CYCLE_DATE                      DATE          NOT NULL
)

La tabla temporal es el resultado de FEE_SCHEDULE_HISTORICAL menos FEE_SCHEDULE

oracle rdbms StrayChild01
fuente
Una pregunta tan detallada como esta realmente debería estar en una pila de DBA.
pst
¿No ..AND EXISTS (SELECT NULL..siempre devolvería falso? ¿Tendría esto ..AND NOT EXISTS (SELECT 1..más sentido?
AnBisw
2
@Annjawn Hola, de acuerdo con este forum.oracle.com/forums/thread.jspa?threadID=353014 NULL o 1 son solo nombres "simbólicos" (nunca se usan fuera de la sub-selección).
Sí, lo son y soy consciente de eso. ¿Pero no es lo que pregunté? SELECT NULL...es simplemente confuso y no debe usarse (a menos que esté usando a UNION).
AnBisw
3
¿Intentaste agregar un índice fee_schedule (universe, fund_id, feetype_name, breakpoint_type, breakpoint_qty, low_breakpoint_amt)? Tal vez uno encendido universe, fund_id ya sea lo suficientemente bueno como para convertir ese FTS en un escaneo de índice.
a_horse_with_no_name

Respuestas:

2

Supongo que su FEE_SCHEDULEmesa es mucho más pequeña que la FEE_SCHEDULE_HISTORICALmesa, por lo que es posible que desee explotar EXISTSun poco más. Sumergirse en la FEE_SCHEDULEtabla fila por fila puede ser una operación relativamente barata en comparación con unirlo a todas las filas en el FEE_SCHEDULE_HISTORICAL.

Dado que la ETL_FEE_SCH_TMPtabla es el FEE_SCHEDULE_HISTORICALmenos FEE_SCHEDULE, en realidad puede realizar la actualización con solo un par de EXISTSdeclaraciones, sin todas las uniones y ahorrándole la molestia de crear la tabla temporal. Realmente no necesitas la tabla temporal.

Creo que vale la pena echarle un vistazo:

update FEE_SCHEDULE_HISTORICAL H
set H.VALID_THROUGH = (sysdate - 1), H.LAST_UPDATE_TMSTMP = SYSTIMESTAMP
where 
    H.VALID_THROUGH = TO_DATE ('31-DEC-9999', 'dd-mon-yyyy')
    AND H.universe = 'DC'
    AND NOT EXISTS
    (
    SELECT 1
        FROM FEE_SCHEDULE F
        WHERE 
            F.universe = H.Universe
            AND F.FUND_ID = H.FUND_ID
            AND F.FEETYPE_NAME = H.FEETYPE_NAME
            AND F.BREAKPOINT_TYPE = H.BREAKPOINT_TYPE
            AND F.BREAKPOINT_QTY = H.BREAKPOINT_QTY
            AND F.LOW_BREAKPOINT_AMT = H.LOW_BREAKPOINT_AMT
            AND F.HIGH_BREAKPOINT_AMT = H.HIGH_BREAKPOINT_AMT
            AND F.FEE_PCT = H.FEE_PCT
    )
    AND EXISTS
        (
        SELECT 1
        FROM FEE_SCHEDULE FF
        WHERE 
            FF.universe = 'DC'
            AND FF.FUND_ID = h.FUND_ID
            AND FF.FEETYPE_NAME = h.FEETYPE_NAME
            AND FF.BREAKPOINT_TYPE = h.BREAKPOINT_TYPE
            AND FF.BREAKPOINT_QTY = h.BREAKPOINT_QTY
            AND FF.LOW_BREAKPOINT_AMT = h.LOW_BREAKPOINT_AMT
  )

Además, considere agregar un índice a la FEE_SCHEDULEtabla, similar al del FEE_SCHEDULE_HISTORICAL. Eso realmente ayuda a explicar el plan.

CREATE UNIQUE INDEX FEE_SCHDL_IDX ON FEE_SCHEDULE (
    UNIVERSE,
    FUND_ID,
    FEETYPE_NAME,
    BREAKPOINT_TYPE,
    BREAKPOINT_QTY, 
    LOW_BREAKPOINT_AMT
);
druzin
fuente