Oracle查询性能优化

Question

我目前正在优化以下查询，并且需要60多分钟才能运行。查询中提供的日期将替换为在执行期间计算日期的变量。该查询的目标是在10分钟内运行。

SELECT
   clm.clcl_payee_pr_id, 
   clm.sbsb_ck, 
   clm.clcl_id, 
   clm.meme_ck, 
   clm.clcl_paid_dt, 
   Row_number() 
     OVER ( 
       ORDER BY clm.clcl_payee_pr_id, clm.sbsb_ck, clm.clcl_id) AS reccount
FROM cmc_mepe_prcs_elig MEPE 
INNER JOIN cmc_meme_member MEME 
        ON MEPE.meme_ck = MEME.meme_ck 
           AND MEPE.grgr_ck = '41' 
INNER JOIN cmc_mepr_prim_prov MEPR 
        ON MEPE.meme_ck = MEPR.meme_ck 
           AND MEPR.grgr_ck = '41' 
INNER JOIN cmc_sbsb_subsc SBSB 
        ON MEME.sbsb_ck = SBSB.sbsb_ck 
           AND SBSB. grgr_ck = '41' 
INNER JOIN cmc_prpr_prov PROV 
        ON MEPR.prpr_id = PROV.prpr_id 
INNER JOIN cmc_prer_relation PRER 
        ON PRER.prpr_id = MEPR.prpr_id 
           AND PRER.prer_prpr_entity = 'I' 
           AND PRER.prer_prpr_id IN ( '02549455' ) 
INNER JOIN cmc_clcl_claim CLM 
        ON MEME.meme_ck = CLM.meme_ck 
           AND CLM.clcl_prpr_id_pcp = MEPR.prpr_id 
INNER JOIN cmc_prpr_prov PRPR 
        ON CLM.prpr_id = PRPR.prpr_id 
INNER JOIN cmc_plds_plan_desc PLDS 
        ON MEPE.cspi_id = PLDS.cspi_id 
INNER JOIN cmc_pdds_prod_desc PDDS 
        ON MEPE.pdpd_id = PDDS.pdpd_id 
WHERE  MEPE.mepe_elig_ind = 'Y' 
AND CLM.clcl_low_svc_dt BETWEEN MEPE.mepe_eff_dt AND MEPE.mepe_term_dt 
AND CLM.clcl_low_svc_dt BETWEEN MEPR.mepr_eff_dt AND MEPR.mepr_term_dt 
AND CLM.clcl_cur_sts = '02' 
AND CLM.clcl_cl_type = 'M' 
AND CLM.clcl_cl_sub_type = 'H' 
AND CLM.grgr_ck IN ( 41 ) 
AND ( PLDS.plds_desc LIKE '%risk%' OR PDDS.pdds_desc LIKE '%risk%' ) 
AND CLM.clcl_paid_dt BETWEEN  '24-APR-19 12.00.00.000000 AM' AND '30-APR-19 11.59.59.997000 PM';

下面是每个使用的表的总行数。

• cmc_mepe_prcs_elig：103,974,973
• cmc_meme_member：22,433,154
• cmc_mepr_prim_prov：53,498,452
• cmc_sbsb_subsc：22,433,154
• cmc_prpr_prov：5,266,062
• cmc_prer_relation：4,735,086
• cmc_clcl_claim：897,405,800
• cmc_plds_plan_desc：19,122
• cmc_pdds_prod_desc：4,776

所有这些表都驻留在主数据库中，该数据库是只读数据库，不允许我创建任何索引以提高性能。唯一的选择是使用提示并进行查询。

下面是上面查询的当前执行计划。

关于性能调优，我是一个新手，如果可以让我知道是否应该提供有关表的其他信息，以便您提出有关调优查询的建议，我们将不胜感激。

Answer 1

SELECT CLM.CLCL_PAYEE_PR_ID,
       CLM.SBSB_CK,
       CLM.CLCL_ID,
       CLM.MEME_CK,
       CLM.CLCL_PAID_DT,
       ROW_NUMBER ()
          OVER (ORDER BY CLM.CLCL_PAYEE_PR_ID, CLM.SBSB_CK, CLM.CLCL_ID)
          AS RECCOUNT
  FROM CMC_MEPE_PRCS_ELIG MEPE
       INNER JOIN CMC_PLDS_PLAN_DESC PLDS ON MEPE.CSPI_ID = PLDS.CSPI_ID
       INNER JOIN CMC_PDDS_PROD_DESC PDDS ON MEPE.PDPD_ID = PDDS.PDPD_ID
       INNER JOIN CMC_MEME_MEMBER MEME
          ON MEPE.MEME_CK = MEME.MEME_CK AND MEPE.GRGR_CK = '41'
       INNER JOIN CMC_SBSB_SUBSC SBSB
          ON MEME.SBSB_CK = SBSB.SBSB_CK AND SBSB.GRGR_CK = '41'
       INNER JOIN CMC_MEPR_PRIM_PROV MEPR
          ON MEPE.MEME_CK = MEPR.MEME_CK AND MEPR.GRGR_CK = '41'
       INNER JOIN CMC_PRPR_PROV PROV ON MEPR.PRPR_ID = PROV.PRPR_ID
       INNER JOIN CMC_PRER_RELATION PRER
          ON PRER.PRPR_ID = MEPR.PRPR_ID AND PRER.PRER_PRPR_ENTITY = 'I'
       INNER JOIN CMC_PRPR_PROV PRPR ON CLM.PRPR_ID = PRPR.PRPR_ID
       INNER JOIN CMC_CLCL_CLAIM CLM
          ON     MEME.MEME_CK = CLM.MEME_CK
--             AND CLM.CLCL_PRPR_ID_PCP = MEPR.PRPR_ID
 WHERE     MEPE.MEPE_ELIG_IND = 'Y'
       AND CLM.CLCL_LOW_SVC_DT BETWEEN MEPE.MEPE_EFF_DT AND MEPE.MEPE_TERM_DT
       AND CLM.CLCL_LOW_SVC_DT BETWEEN MEPR.MEPR_EFF_DT AND MEPR.MEPR_TERM_DT
       AND CLM.CLCL_CUR_STS = '02'
       AND CLM.CLCL_CL_TYPE = 'M'
       AND CLM.CLCL_CL_SUB_TYPE = 'H'
       AND CLM.GRGR_CK IN (41)
--       AND (PLDS.PLDS_DESC LIKE '%risk%' OR PDDS.PDDS_DESC LIKE '%risk%')
       AND CLM.CLCL_PAID_DT BETWEEN '24-APR-19 12.00.00.000000 AM'
                                AND '30-APR-19 11.59.59.997000 PM'
       AND PRER.PRER_PRPR_ID = '02549455';