Oracle Parallel模式

这个可以加到insert、delete、update、select的后面来使用（和rule的用法差不多，有机会再分享rule的用法）

开启parallel功能的语句是：

alter session enable parallel dml;

这个语句是DML语句哦，如果在程序中用，用execute的方法打开。

实际应用sql

SELECT /*+ parallel(PZFL,3) parallel(PZK,3) parallel(TRAN,3) */
 PZK.JSPZK_PZNM PZNM,
 PZK.JSPZK_JGBH JGBH,
 PZFL.JSPZFL_ZY FLZY,
 PZK.JSPZK_REVER_DATE CMRQ,
 (SELECT T.CUST_NAME
    FROM CUST_CORP_INFO T
   WHERE T.CUST_CODE = PZFL.JSPZFL_DWBH) CUSTNAME,
 KHXX.cust_code CUSTID,
 (SELECT F_JGMC FROM LSJGZD WHERE F_JGBH = PZK.JSPZK_JGBH) JGMC,
 PZK.JSPZK_BZ ZY,
 DECODE(PZK.JSPZK_BSNS_SRC, ‘10‘, ‘10‘, ‘11‘) BSNSSOURCE,
 PZK.JSPZK_PZRQ PZRQ,
 PZK.JSPZK_START_ACCUAL_DATE QXRQ,
 PZK.JSPZK_PZSJ PZSJ,
 PZK.JSPZK_PZBH PZBH,
 PZK.JSPZK_PZLX PZLX,
 PZFL.JSPZFL_ZHBH ZHBH,
 PZFL.JSPZFL_KMBH KMBH,
 DECODE(JSPZFL_JZFX, ‘1‘, JSPZFL_JE, 0) JFFS,
 DECODE(JSPZFL_JZFX, ‘2‘, JSPZFL_JE, 0) DFFS,
 DECODE(KMZD.F_YEFX, 2, PZFL.JSPZFL_BAL * (-1), PZFL.JSPZFL_BAL) ZHDQYE,
 DECODE(KMZD.F_YEFX,
        2,
        NVL(PZFL.JSPZFL_FUNDSPOOL_BAL, 0) * (-1),
        NVL(PZFL.JSPZFL_FUNDSPOOL_BAL, 0)) DQSCYE,
 KMZD.F_YEFX YEFX,
 KMZD.F_KMMC KMMC,
 (SELECT F_WBMC FROM LSWBZD WHERE F_WBBH = PZFL.JSPZFL_BZ) WBMC,
 TRAN.BUSI_TRAC_CODE YW,
 DECODE(PZK.JSPZK_KMACCFLAG, ‘1‘, ‘已记账‘, ‘0‘, ‘未记账‘) KMACCFLAG,
 PZFL.JSPZFL_ZHMC MC,
 PZK.JSPZK_DJBH DJBH,
 PZK.JSPZK_PZBZ PZBZ,
 PZK.JSPZK_JZBZ JZBZ,
 (SELECT F_NAME FROM LSGYZD WHERE F_GYBH(+) = PZK.JSPZK_ZDR) ZDR,
 (SELECT F_NAME FROM LSGYZD WHERE F_GYBH(+) = PZK.JSPZK_JZR) JZR,
 PZK.JSPZK_SGPZNM SGPZH　,
 PZFL.JSPZFL_OPP_NAME OPPNAME,
 PZFL.JSPZFL_OPP_OPEN_BANK OPPBANK,
 PZFL.JSPZFL_OPP_ACTNO OPPACTNO,
 TRAN.OPP_CUST_NAME,
 TRAN.OPP_CUST_ACC_CODE
  FROM JSPZK PZK, JSPZFL PZFL, TRAN_FLOW TRAN, CUST_BASE KHXX, LSKMZD KMZD
 WHERE PZK.JSPZK_PZNM = PZFL.JSPZFL_PZNM
   AND TRAN.TRAC_ID(+) = PZK.JSPZK_DJBH
   AND PZFL.JSPZFL_DWBH = KHXX.cust_code
   AND PZFL.JSPZFL_KMBH = KMZD.F_KMBH(+)
   and exists (select 1
          from V_DIC_ACC ACC
         where ACC.BH = PZFL.JSPZFL_ZHBH
           AND ACC.BH = ‘990110100187704203‘)
   AND PZK.JSPZK_PZRQ >= ‘20181224‘
   AND PZK.JSPZK_PZRQ <= ‘20181224‘
   AND PZK.JSPZK_JGBH = ‘99‘
   AND PZK.JSPZK_JZBZ IN (‘1‘, ‘2‘)
 ORDER BY PZK.JSPZK_PZNM, PZFL.JSPZFL_FLNM

Oracle Parallel模式

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