Oracle：基になるビューのデータ変更後にMWがNEEDS_COMPILE状態に無効化される理由

Question

以下のマテリアライズド・ビューおよびその基礎となるビューを使用して、いくつかのレポートを実現しています。マテリアライズド・ビューは、アプリケーションから完全に手動でリフレッシュされます（DBMS_SNAPSHOT.REFRESH（ '"OVERALL_WEEKLY"、' C '）;）。このコールの後、ビューはFRESH状態ですが、基になる表に対してDML操作が実行された後、マテリアライズド・ビューはNEEDS_COMPILE状態になります。 ビューのクエリは次のとおりです。 EBR_CYCLE_TIMEおよびEBR_AREAのテーブルの下落が頻繁に変化しています。したがってコミット時のリフレッシュは、私たちの目的のための選択肢ではありません。

NEEDS_COMPILE状態を回避する手段はありますか？ NEED_COMPILE状態の原因は何ですか？

CREATE OR REPLACE FORCE VIEW "OTD_WEEKLY" AS 
    SELECT 
    otd.WEEK, 
    otd.SITE_ID, 
    otd.AREA_ID, 
    otd.OTD_METRIC            AS CT_METRIC, 
    ROUND(100 * (SUM(otd.SUCCESS)/SUM(otd.CT_TOTAL_COUNT)), 2) AS OTD_VALUE 
    FROM 
    (SELECT 
     FC.MFL_FISCAL_YR_NUM * 100 + FC.MFL_FISCAL_WK_NUM AS WEEK, 
     r.BUSINESS_UNIT_ID        AS PAL2_ID, 
     a.site_id           AS SITE_ID, 
     a.area_def_id          AS AREA_ID, 
     a.PRIORITY          AS PRIORITY, 
     r.EBR_BUILD_SUBTYPE        AS NPI, 
     r.CORPORATE_TD         AS CTD, 
     ctd.NAME           AS OTD_METRIC, 
     COUNT(r.ebr_number)        AS CT_TOTAL_COUNT, 
     COUNT(
      CASE 
      WHEN (ct.TIME_ELAPSED) > (ct.TARGET * 86400) 
      THEN NULL 
      ELSE r.ebr_number 
      END)           AS SUCCESS, 
     COUNT(
      CASE 
      WHEN (ct.TIME_ELAPSED) > (ct.TARGET * 86400) 
      THEN r.ebr_number 
      ELSE NULL 
      END)           AS MISSED, 
     COUNT(DISTINCT r.ebr_number)      AS TOTAL_NUMBER_OF_EBR 
    FROM ebr_cycle_time ct 
     JOIN ebr_area a 
     ON (a.id = ct.ebr_area_id 
      AND ct.status = 'FINISHED' 
      AND a.ship_date IS NOT NULL) 
     JOIN ebr_request r 
     ON (a.ebr_id = r.id AND r.submit_date >= to_date((select STRING_VALUE from EBR_STATUS_TABLE where key = 'REPORT_DATE_FROM'),'DD.MM.YY')) 
     JOIN EBR_GROUP_CYCLE_TIME_DEF gctd 
     ON (ct.CYCLE_TIME_GROUP_DEF = gctd.ID) 
     JOIN EBR_CYCLE_TIME_DEF ctd 
     ON (ctd.ID = gctd.CYCLE_TIME_DEF_ID 
      AND ctd.OTD_METRIC = 'Y') 
     JOIN EBR_CYCLE_TIME_GROUP ctg 
     ON (ctg.id = gctd.CYCLE_TIME_GROUP_ID) 
     JOIN EEBR_MC_LCL_FISCAL FC 
     ON (FC.MFL_QUERY_DT = TRUNC(a.ship_date) AND fc.MFL_QUERY_DT > add_months(trunc(sysdate, 'MM'), -8) AND fc.MFL_QUERY_DT <= sysdate) 
    GROUP BY 
     r.BUSINESS_UNIT_ID, 
     a.site_id, 
     a.area_def_id, 
     ctd.name, 
     fc.mfl_fiscal_yr_num, 
     fc.mfl_fiscal_wk_num, 
     ct.target, 
     a.PRIORITY, 
     r.CORPORATE_TD, 
     r.EBR_BUILD_SUBTYPE 
    ) otd 
    GROUP BY 
    otd.WEEK, 
    otd.PAL2_ID, 
    otd.SITE_ID, 
    otd.AREA_ID, 
    otd.OTD_METRIC; 


CREATE OR REPLACE FORCE VIEW "LAGGING_SCORE_WEEKLY" AS 
    SELECT 
    dsc.SITE_ID, 
    dsc.AREA_ID, 
    dsc.CT_METRIC, 
    (dsc.ARCHIVE_YEAR * 100 + dsc.ARCHIVE_WEEK) AS WEEK, 
    ROUND(AVG(SCORE), 4)      AS SCORE 
    FROM 
    (SELECT 
     cts.site_id           AS SITE_ID, 
     ls.AREA_DEF_ID          AS AREA_ID, 
     ctd.name           AS CT_METRIC, 
     ctd.id            AS CT_ID, 
     fc.MFL_QUERY_DT          AS ARCHIVE_DAY, 
     fc.MFL_FISCAL_WK_NUM        AS ARCHIVE_WEEK, 
     fc.MFL_FISCAL_MTH_NUM        AS ARCHIVE_MONTH, 
     fc.MFL_FISCAL_YR_NUM        AS ARCHIVE_YEAR, 
     (fc.MFL_FISCAL_YR_NUM * 100 + fc.MFL_FISCAL_WK_NUM) AS WEEK, 
     CASE 
     WHEN SUM(cts.PENALTY) > 0 
     THEN SUM(cts.PENALTY) 
     ELSE 0 
     END             AS EBR_PENALTY, 
     COUNT(DISTINCT cts.ebr_number)      AS NUMBER_OF_EBR, 
     COUNT(DISTINCT (
     CASE 
     WHEN cts.LAGGING_TIME > 0 
      THEN cts.ebr_number 
     ELSE NULL 
     END))            AS NUMBER_OF_LAGGING_EBR, 
     CASE 
     WHEN SUM(cts.PENALTY) > 0 
     THEN greatest(100 - 100 * (SUM(cts.PENALTY)/COUNT(DISTINCT cts.ebr_number)), 0) 
     ELSE 100 
     END             AS SCORE 
    FROM EBR_CYCLE_TIME_SNAPSHOT cts 
     JOIN EBR_REQUEST r 
     ON (r.ebr_number = cts.ebr_number AND r.submit_date >= to_date((select STRING_VALUE from EBR_STATUS_TABLE where key = 'REPORT_DATE_FROM'),'DD.MM.YY')) 
     RIGHT JOIN EBR_LAGGING_STATISTIC ls 
     ON ((TRUNC(ls.stat_date) = TRUNC(cts.SNAPSHOT_TIME)) 
      AND ls.site_id = cts.site_id 
      AND cts.AREA_DEF_ID = ls.AREA_DEF_ID 
      AND ls.CT_DEF_ID = cts.CYCLE_TIME_DEF_ID) 
     JOIN EBR_CYCLE_TIME_DEF ctd 
     ON (ls.CT_DEF_ID = ctd.id 
      AND ctd.OTD_METRIC = 'Y') 
     JOIN EEBR_MC_LCL_FISCAL fc 
     ON (TRUNC(ls.STAT_DATE) = TRUNC(fc.MFL_QUERY_DT) AND fc.MFL_QUERY_DT > add_months(trunc(sysdate, 'MM'), -8)) 
    GROUP BY 
     cts.site_id, 
     ls.AREA_DEF_ID, 
     ctd.name, 
     ctd.id, 
     fc.MFL_QUERY_DT, 
     fc.MFL_FISCAL_WK_NUM, 
     fc.MFL_FISCAL_MTH_NUM, 
     fc.MFL_FISCAL_YR_NUM, 
     ls.NUMBER_OF_EBR, 
     ls.NUMBER_OF_LAGGING_EBR, 
     TRUNC(ls.STAT_DATE) 
    ) dsc 
    GROUP BY dsc.SITE_ID, 
    dsc.AREA_ID, 
    dsc.CT_METRIC, 
    dsc.ARCHIVE_WEEK, 
    dsc.ARCHIVE_MONTH, 
    dsc.ARCHIVE_YEAR; 


CREATE OR REPLACE FORCE VIEW "START_COMPLIANCE_WEEKLY" AS 
    SELECT 
    'Starts Compliance'          AS CT_METRIC, 
    a.site_id             AS SITE_ID, 
    a.area_def_id            AS AREA_ID, 
    ((lstw.MFL_FISCAL_YR_NUM * 100) + lstw.MFL_FISCAL_WK_NUM) AS WEEK, 
    ROUND(AVG(
       CASE 
       WHEN ((ct.START_DATE IS NOT NULL 
        AND TRUNC((ct.START_DATE AT TIME ZONE 'MST') AT TIME ZONE s.time_zone) > 
         TRUNC((a.FIRST_FIRM_START_DATE AT TIME ZONE 'MST') AT TIME ZONE s.time_zone)) 
        OR (ct.START_DATE IS NULL 
         AND next_day(TRUNC(sysdate) - 7, 'Sun') > 
          TRUNC((a.FIRST_FIRM_START_DATE AT TIME ZONE 'MST') AT TIME ZONE s.time_zone))) 
       THEN 0 
       ELSE 100 
       END), 2)          AS SCORE 
    FROM ebr_area a 
    JOIN ebr_request r 
     ON (a.ebr_id = r.id AND a.FIRST_FIRM_START_DATE IS NOT NULL 
      AND a.FIRST_FIRM_START_DATE <= next_day(TRUNC(sysdate) - 7, 'Sun') AND AND r.status <> 'CANCELLED' 
      AND r.submit_date >= to_date((select STRING_VALUE from EBR_STATUS_TABLE where key = 'REPORT_DATE_FROM'),'DD.MM.YY')) 
    JOIN ebr_site s 
     ON (s.id = a.site_id) 
    LEFT JOIN 
    (SELECT 
     ct.START_DATE AS START_DATE, 
     ct.ROUND  AS ROUND, 
     ct.ebr_area_id AS area_id 
    FROM ebr_cycle_time ct 
     JOIN EBR_GROUP_CYCLE_TIME_DEF gctd 
     ON (ct.CYCLE_TIME_GROUP_DEF = gctd.ID 
      AND ct.status <> 'NEW') 
     JOIN EBR_CYCLE_TIME_DEF ctd 
     ON (ctd.ID = gctd.CYCLE_TIME_DEF_ID 
      AND ctd.code = 'SITE_PROCESSING') 
    ) ct ON (ct.area_id = a.id) 
    JOIN EEBR_MC_LCL_FISCAL lstw 
     ON (lstw.MFL_QUERY_DT = TRUNC(FIRST_FIRM_START_DATE) AND lstw.MFL_QUERY_DT > add_months(trunc(sysdate, 'MM'), -8)) 
    GROUP BY 
    a.site_id, 
    s.time_zone, 
    a.area_def_id, 
    lstw.MFL_FISCAL_YR_NUM, 
    lstw.MFL_FISCAL_WK_NUM; 


CREATE MATERIALIZED VIEW "OVERALL_WEEKLY" 
    AS SELECT s.code AS SITE_CODE, 
    s.name  AS SITE_NAME, 
    reports.SITE_ID, 
    ad.NAME AS AREA, 
    ad.CODE AS AREA_CODE, 
    reports.AREA_ID, 
    reports.REPORT_TYPE, 
    reports.CT_METRIC, 
    reports.WEEK, 
    reports.SCORE 
FROM (
    (SELECT 'Starts Compliance' AS REPORT_TYPE, 
    AREA_ID, 
    SITE_ID, 
    CT_METRIC, 
    WEEK, 
    SCORE 
    FROM START_COMPLIANCE_WEEKLY 
) 
UNION 
    (SELECT 'OTD' AS REPORT_TYPE, 
    AREA_ID, 
    SITE_ID, 
    OTD_WEEKLY.CT_METRIC, 
    OTD_WEEKLY.WEEK, 
    OTD_WEEKLY.OTD_VALUE AS SCORE 
    FROM OTD_WEEKLY 
) 
UNION 
    (SELECT 'Lagging' AS REPORT_TYPE, 
    AREA_ID, 
    SITE_ID, 
    LAGGING_SCORE_WEEKLY.CT_METRIC, 
    LAGGING_SCORE_WEEKLY.WEEK, 
    LAGGING_SCORE_WEEKLY.SCORE 
    FROM LAGGING_SCORE_WEEKLY 
)) reports 
JOIN EBR_SITE s 
ON (s.id = reports.SITE_ID) 
JOIN EBR_AREA_DEF ad 
ON (ad.id = reports.area_id); 

Answer 1

これは予想される動作です。 NEEDS_COMPILEステータスは、MViewデータがソースデータと異なることを意味します。それは情報目的のためだけにある。​​が使用に適さない場合は、NEEDS_COMPILEステータスのMViewを無視できます。

参照MOSドキュメントID 264036.1：

のMVに関連する依存関係を自動的に 正しい動作を保証するために維持されています。 MVが作成されると、マテリアライズド・ビュー は、その定義で参照されるマスター表に依存します。 のDML 操作（INSERTまたはDELETE、UPDATEまたはDDL操作など）で、マテリアライズド・ビューに依存すると、 が無効になります。