ora01747

Jun 07, 2016 pm 02:57 PM
optimization view

求助,还能这么优化?这是一个视图的查询,每次要10秒左右。 我移到存储过程中,居然报ORA-01747:user.table.column,table.column或列说明无效 无语了,放在视图中没问题的, dblink是不是有什么限制,还是啥的。 Oracle insert into MR_MSG_XZBKMX_RES_BKXX(

求助,还能这么优化?这是一个视图的查询,每次要10秒左右。
我移到存储过程中,居然报 ORA-01747: user.table.column, table.column 或列说明无效
无语了,放在视图中没问题的,
dblink是不是有什么限制,还是啥的。 Oracle
   insert into MR_MSG_XZBKMX_RES_BKXX(ID,MSGID,HH,HM,   DZ,BW,BCH,
    BWH,KJ,BSH,   SQXZ,SQCBR,HBSL,
    ZDDS,RJSL,LSSL,   QSL1,QSL2,QSL3,
    DJ,HHYS,YSXZMS,   RKS,CBZQ,SFLX,
    LXDH,ZBRQ,QFSL,   QFJE,QFBS,DKZHYE,
    SQDBDS,YSKYE,TSXX,   MS1,MS2,MS3,
    MS4,MS5,CBSXH, BKSXH)   
   select SEQ_MR_MSG_XZBKMX_RES_BKXX.nextval, pinmsgid,x.HH,x.HM,  x.DZ,x.BW,x.BCH,
    x.BWH,x.KJ,x.BSH,   x.SQXZ,x.SQCBR,x.HBSL,
    decode(x.ZDDS,0,v_zdds,x.ZDDS),x.RJSL,case when v_lssllx=1 then x.qsl1 else x.pjsl end,   x.QSL1,x.QSL2,x.QSL3,
    x.DJ,x.HHYS,x.YSXZMS,   x.RKS,x.CBZQ,x.SFLX,
    x.LXDH,x.ZBRQ,x.QFSL,   x.QFJE,x.QFBS,x.DKZHYE,
    x.SQDBDS,x.YSKYE,x.TSXX,   x.MS1,x.MS2,x.MS3,
    x.MS4,x.MS5,x.CBSXH,  rownum   from
(select a.hh,
 a.bzmc HM,
 a.yhdz DZ, 
 a.zbwz BW,
 a.bch, 
 a.bwh,
 f.kj, 
 f.bsh,
 NVL(g.xbqd,d.sqxz) SQXZ,  
 d.sqcbr,
 0 hbsl,
 f.zdds zdds,
 -1 rjsl,        
 d.pjsl,
 d.qsl1,d.qsl2,d.qsl3,
 a.zysxz,
 h.dj,
 case when a.ysxzsl=1 then 0 else 1 end hhys, 
 h.xzms YSXZMS,
 a.ysrk RKS,
 a.cbzq,
 i.sflx,
 i.lxdh,         
 k.zbrq,
 0 QFSL, 
 0 QFJE,
 0 QFBS,
 0 dkzhye,   
 0 sqdbds,     
 NVL(i.yskye,0) yskye,   
 null tsxx,                    
 null ms1,
 null ms2,
 null ms3,
 null ms4,
 null ms5,
 d.cbsxh
from da_yhbk@o3mislink  a
   full join da_cbxx@o3mislink  d on a.hh = d.hh
   full join sb_sbda@o3mislink  f on f.sbid = a.sbid
   full join da_khxx@o3mislink  i on i.khh = a.khh
   full join da_lhxx@o3mislink  k on k.hh = a.hh
   full join da_dm_yhzt@o3mislink  c on a.yhzt = c.ztid and c.sfcb = 1
   left join mr_gps n on a.hh=n.hh
   left join (select x.hh,x.xbqd
      from cb_chrw@o3mislink  x,
           (select a.hh,max(a.sgrq) sgrq from cb_chrw@o3mislink  a,da_yhbk@o3mislink  c
            where (v_bchs like '%'||c.bch||',%') and a.hh=c.hh and a.jsbz=1
            group by a.hh) y
      where x.hh = y.hh and x.sgrq = y.sgrq) g on g.hh = a.hh
   full join (select ysxz,dj,xzms from fy_ysxz@o3mislink
                where v_sfyf between sxrq and nvl(jsrq,v_sfyf)
             ) h on a.zysxz = h.ysxz
   left join cb_slb@o3mislink  e on a.hh = e.hh and e.jgbz in (0,1,2,4,6,7) and e.sfyf = v_sfyf
where v_bchs like '%'||a.bch||',%'
and MOD(EXTRACT(month from trunc(v_sfyf,'MM')),a.CBZQ)=MOD(a.QCY,a.CBZQ)
and e.hh is null
order by a.bch,d.cbsxh
   ) x;
   
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SELECT STATEMENT, GOAL = ALL_ROWS			216384	148833	69058512
 SORT ORDER BY			216384	148833	69058512
  FILTER					
   NESTED LOOPS OUTER			201685	148833	69058512
    HASH JOIN RIGHT SEMI			168940	148833	68165514
     TABLE ACCESS FULL	NNMIS	DA_DM_YHZT	2	5	30
     VIEW	SYS		168919	1041831	470907612
      UNION-ALL					
       HASH JOIN RIGHT OUTER			123752	1041825	468821250
        TABLE ACCESS BY INDEX ROWID	NNMIS	FY_YSXZ	3	6	186
         INDEX RANGE SCAN	NNMIS	IDX_FY_YSXZ_SXRQ	2	21	
        HASH JOIN RIGHT OUTER			123731	1041825	436524675
         VIEW	NNMIS		1052	1	26
          TABLE ACCESS BY INDEX ROWID	NNMIS	CB_CHRW	2	1	14
           NESTED LOOPS			1052	1	36
            VIEW	NNMIS		1050	1	22
             HASH GROUP BY			1050	1	33
              HASH JOIN			1047	17643	582219
               INDEX FAST FULL SCAN	NNMIS	IX_DA_YHBK_BCH	431	17341	329479
               TABLE ACCESS FULL	NNMIS	CB_CHRW	614	33941	475174
            INDEX RANGE SCAN	NNMIS	IDX_CB_CHRW_HH	1	1	
         HASH JOIN RIGHT OUTER			122661	1041825	409437225
          REMOTE		MR_GPS	0	1	9
          VIEW	SYS		122642	1041825	400060800
           UNION-ALL					
            HASH JOIN RIGHT OUTER			49369	710090	274804830
             TABLE ACCESS FULL	NNMIS	DA_LHXX	879	331736	3980832
             VIEW	SYS		35071	710090	266283750
              UNION-ALL					
               HASH JOIN RIGHT OUTER			16953	374282	127255880
                TABLE ACCESS FULL	NNMIS	DA_KHXX	1631	335809	5372944
                VIEW	SYS		8900	374282	121267368
                 UNION-ALL					
                  NESTED LOOPS OUTER			4073	174	54462
                   VIEW	SYS		3724	174	52026
                    UNION-ALL					
                     NESTED LOOPS OUTER			2685	173	41174
                      TABLE ACCESS FULL	NNMIS	DA_YHBK	2346	173	36676
                      TABLE ACCESS BY INDEX ROWID	NNMIS	DA_CBXX	2	1	26
                       INDEX UNIQUE SCAN	NNMIS	PK_DA_CBXX	1	1	
                     FILTER					
                      NESTED LOOPS ANTI			1040	1	39
                       TABLE ACCESS FULL	NNMIS	DA_CBXX	931	331736	8625136
                       INDEX UNIQUE SCAN	NNMIS	PK_DA_YHBK	0	346828	4508764
                   TABLE ACCESS BY INDEX ROWID	NNMIS	SB_SBDA	2	1	14
                    INDEX UNIQUE SCAN	NNMIS	PK_CB_SBDA	1	1	
                  FILTER					
                   HASH JOIN RIGHT ANTI			4827	374108	10100916
                    VIEW	NNMIS		3050	346829	4508777
                     UNION-ALL					
                      MERGE JOIN OUTER			2771	346828	10751668
                       TABLE ACCESS BY INDEX ROWID	NNMIS	DA_YHBK	1546	346828	9017528
                        INDEX FULL SCAN	NNMIS	PK_DA_YHBK	744	346828	
                       SORT JOIN			1226	331736	1658680
                        INDEX FAST FULL SCAN	NNMIS	PK_DA_CBXX	171	331736	1658680
                      NESTED LOOPS ANTI			279	1	18
                       INDEX FAST FULL SCAN	NNMIS	PK_DA_CBXX	171	331736	1658680
                       INDEX UNIQUE SCAN	NNMIS	PK_DA_YHBK	0	346828	4508764
                    TABLE ACCESS FULL	NNMIS	SB_SBDA	883	374109	5237526
               FILTER					
                HASH JOIN ANTI			18117	335808	9738432
                 TABLE ACCESS FULL	NNMIS	DA_KHXX	1631	335809	5372944
                 VIEW	NNMIS		15153	720937	9372181
                  UNION-ALL					
                   HASH JOIN RIGHT OUTER			11205	346829	10404870
                    INDEX FAST FULL SCAN	NNMIS	PK_CB_SBDA	181	374109	1496436
                    VIEW	NNMIS		10094	346829	9017554
                     UNION-ALL					
                      MERGE JOIN OUTER			9055	346828	621168948
                       TABLE ACCESS BY INDEX ROWID	NNMIS	DA_YHBK	1546	346828	591688568
                        INDEX FULL SCAN	NNMIS	PK_DA_YHBK	744	346828	
                       SORT JOIN			7509	331736	28197560
                        TABLE ACCESS FULL	NNMIS	DA_CBXX	931	331736	28197560
                      NESTED LOOPS ANTI			1040	1	98
                       TABLE ACCESS FULL	NNMIS	DA_CBXX	931	331736	28197560
                       INDEX UNIQUE SCAN	NNMIS	PK_DA_YHBK	0	346828	4508764
                   HASH JOIN ANTI			3948	374108	6359836
                    INDEX FAST FULL SCAN	NNMIS	PK_CB_SBDA	181	374109	1496436
                    VIEW	NNMIS		3050	346829	4508777
                     UNION-ALL					
                      MERGE JOIN OUTER			2771	346828	10751668
                       TABLE ACCESS BY INDEX ROWID	NNMIS	DA_YHBK	1546	346828	9017528
                        INDEX FULL SCAN	NNMIS	PK_DA_YHBK	744	346828	
                       SORT JOIN			1226	331736	1658680
                        INDEX FAST FULL SCAN	NNMIS	PK_DA_CBXX	171	331736	1658680
                      NESTED LOOPS ANTI			279	1	18
                       INDEX FAST FULL SCAN	NNMIS	PK_DA_CBXX	171	331736	1658680
                       INDEX UNIQUE SCAN	NNMIS	PK_DA_YHBK	0	346828	4508764
            FILTER					
             HASH JOIN ANTI			73273	331735	8293375
              TABLE ACCESS FULL	NNMIS	DA_LHXX	879	331736	3980832
              VIEW	NNMIS		70721	1056745	13737685
               UNION-ALL					
                HASH JOIN RIGHT OUTER			54237	720937	22349047
                 INDEX FAST FULL SCAN	NNMIS	SYS_C0057272	173	335809	1679045
                 VIEW	NNMIS		52462	720937	18744362
                  UNION-ALL					
                   HASH JOIN RIGHT OUTER			46713	346829	743948205
                    TABLE ACCESS FULL	NNMIS	SB_SBDA	883	374109	24691194
                    VIEW	NNMIS		10094	346829	721057491
                     UNION-ALL					
                      MERGE JOIN OUTER			9055	346828	621168948
                       TABLE ACCESS BY INDEX ROWID	NNMIS	DA_YHBK	1546	346828	591688568
                        INDEX FULL SCAN	NNMIS	PK_DA_YHBK	744	346828	
                       SORT JOIN			7509	331736	28197560
                        TABLE ACCESS FULL	NNMIS	DA_CBXX	931	331736	28197560
                      NESTED LOOPS ANTI			1040	1	98
                       TABLE ACCESS FULL	NNMIS	DA_CBXX	931	331736	28197560
                       INDEX UNIQUE SCAN	NNMIS	PK_DA_YHBK	0	346828	4508764
                   HASH JOIN RIGHT ANTI			5749	374108	29554532
                    VIEW	NNMIS		3050	346829	4508777
                     UNION-ALL					
                      MERGE JOIN OUTER			2771	346828	10751668
                       TABLE ACCESS BY INDEX ROWID	NNMIS	DA_YHBK	1546	346828	9017528
                        INDEX FULL SCAN	NNMIS	PK_DA_YHBK	744	346828	
                       SORT JOIN			1226	331736	1658680
                        INDEX FAST FULL SCAN	NNMIS	PK_DA_CBXX	171	331736	1658680
                      NESTED LOOPS ANTI			279	1	18
                       INDEX FAST FULL SCAN	NNMIS	PK_DA_CBXX	171	331736	1658680
                       INDEX UNIQUE SCAN	NNMIS	PK_DA_YHBK	0	346828	4508764
                    TABLE ACCESS FULL	NNMIS	SB_SBDA	883	374109	24691194
                HASH JOIN ANTI			16484	335808	6044544
                 INDEX FAST FULL SCAN	NNMIS	SYS_C0057272	173	335809	1679045
                 VIEW	NNMIS		15153	720937	9372181
                  UNION-ALL					
                   HASH JOIN RIGHT OUTER			11205	346829	10404870
                    INDEX FAST FULL SCAN	NNMIS	PK_CB_SBDA	181	374109	1496436
                    VIEW	NNMIS		10094	346829	9017554
                     UNION-ALL					
                      MERGE JOIN OUTER			9055	346828	621168948
                       TABLE ACCESS BY INDEX ROWID	NNMIS	DA_YHBK	1546	346828	591688568
                        INDEX FULL SCAN	NNMIS	PK_DA_YHBK	744	346828	
                       SORT JOIN			7509	331736	28197560
                        TABLE ACCESS FULL	NNMIS	DA_CBXX	931	331736	28197560
                      NESTED LOOPS ANTI			1040	1	98
                       TABLE ACCESS FULL	NNMIS	DA_CBXX	931	331736	28197560
                       INDEX UNIQUE SCAN	NNMIS	PK_DA_YHBK	0	346828	4508764
                   HASH JOIN ANTI			3948	374108	6359836
                    INDEX FAST FULL SCAN	NNMIS	PK_CB_SBDA	181	374109	1496436
                    VIEW	NNMIS		3050	346829	4508777
                     UNION-ALL					
                      MERGE JOIN OUTER			2771	346828	10751668
                       TABLE ACCESS BY INDEX ROWID	NNMIS	DA_YHBK	1546	346828	9017528
                        INDEX FULL SCAN	NNMIS	PK_DA_YHBK	744	346828	
                       SORT JOIN			1226	331736	1658680
                        INDEX FAST FULL SCAN	NNMIS	PK_DA_CBXX	171	331736	1658680
                      NESTED LOOPS ANTI			279	1	18
                       INDEX FAST FULL SCAN	NNMIS	PK_DA_CBXX	171	331736	1658680
                       INDEX UNIQUE SCAN	NNMIS	PK_DA_YHBK	0	346828	4508764
       FILTER					
        FILTER					
         TABLE ACCESS BY INDEX ROWID	NNMIS	FY_YSXZ	3	6	186
          INDEX RANGE SCAN	NNMIS	IDX_FY_YSXZ_SXRQ	2	21	
        HASH JOIN RIGHT OUTER			16080	3472	187488
         VIEW	NNMIS		1052	1	13
          TABLE ACCESS BY INDEX ROWID	NNMIS	CB_CHRW	2	1	14
           NESTED LOOPS			1052	1	36
            VIEW	NNMIS		1050	1	22
             SORT GROUP BY			1050	1	33
              HASH JOIN			1047	17643	582219
               INDEX FAST FULL SCAN	NNMIS	IX_DA_YHBK_BCH	431	17341	329479
               TABLE ACCESS FULL	NNMIS	CB_CHRW	614	33941	475174
            INDEX RANGE SCAN	NNMIS	IDX_CB_CHRW_HH	1	1	
         NESTED LOOPS OUTER			15029	3472	142352
          VIEW	NNMIS		15027	3472	111104
           UNION-ALL					
            HASH JOIN OUTER			15027	3471	10805223
             VIEW	NNMIS		12159	3471	10520601
              UNION-ALL					
               HASH JOIN OUTER			12159	3470	8904020
                VIEW	NNMIS		7509	3470	8376580
                 UNION-ALL					
                  HASH JOIN OUTER			7509	3469	7441005
                   VIEW	NNMIS		4886	3469	7212051
                    UNION-ALL					
                     HASH JOIN OUTER			4886	3468	6211188
                      TABLE ACCESS FULL	NNMIS	DA_YHBK	2137	3468	5916408
                      TABLE ACCESS FULL	NNMIS	DA_CBXX	931	331736	28197560
                     FILTER					
                      NESTED LOOPS ANTI			1040	1	98
                       TABLE ACCESS FULL	NNMIS	DA_CBXX	931	331736	28197560
                       INDEX UNIQUE SCAN	NNMIS	PK_DA_YHBK	0	346828	4508764
                   TABLE ACCESS FULL	NNMIS	SB_SBDA	883	374109	24691194
                  FILTER					
                   HASH JOIN RIGHT ANTI			5749	374108	29554532
                    VIEW	NNMIS		3050	346829	4508777
                     UNION-ALL					
                      MERGE JOIN OUTER			2771	346828	10751668
                       TABLE ACCESS BY INDEX ROWID	NNMIS	DA_YHBK	1546	346828	9017528
                        INDEX FULL SCAN	NNMIS	PK_DA_YHBK	744	346828	
                       SORT JOIN			1226	331736	1658680
                        INDEX FAST FULL SCAN	NNMIS	PK_DA_CBXX	171	331736	1658680
                      NESTED LOOPS ANTI			279	1	18
                       INDEX FAST FULL SCAN	NNMIS	PK_DA_CBXX	171	331736	1658680
                       INDEX UNIQUE SCAN	NNMIS	PK_DA_YHBK	0	346828	4508764
                    TABLE ACCESS FULL	NNMIS	SB_SBDA	883	374109	24691194
                TABLE ACCESS FULL	NNMIS	DA_KHXX	1631	335809	51042968
               FILTER					
                HASH JOIN RIGHT ANTI			20276	335808	55408320
                 VIEW	NNMIS		15153	720937	9372181
                  UNION-ALL					
                   HASH JOIN RIGHT OUTER			11205	346829	10404870
                    INDEX FAST FULL SCAN	NNMIS	PK_CB_SBDA	181	374109	1496436
                    VIEW	NNMIS		10094	346829	9017554
                     UNION-ALL					
                      MERGE JOIN OUTER			9055	346828	621168948
                       TABLE ACCESS BY INDEX ROWID	NNMIS	DA_YHBK	1546	346828	591688568
                        INDEX FULL SCAN	NNMIS	PK_DA_YHBK	744	346828	
                       SORT JOIN			7509	331736	28197560
                        TABLE ACCESS FULL	NNMIS	DA_CBXX	931	331736	28197560
                      NESTED LOOPS ANTI			1040	1	98
                       TABLE ACCESS FULL	NNMIS	DA_CBXX	931	331736	28197560
                       INDEX UNIQUE SCAN	NNMIS	PK_DA_YHBK	0	346828	4508764
                   HASH JOIN ANTI			3948	374108	6359836
                    INDEX FAST FULL SCAN	NNMIS	PK_CB_SBDA	181	374109	1496436
                    VIEW	NNMIS		3050	346829	4508777
                     UNION-ALL					
                      MERGE JOIN OUTER			2771	346828	10751668
                       TABLE ACCESS BY INDEX ROWID	NNMIS	DA_YHBK	1546	346828	9017528
                        INDEX FULL SCAN	NNMIS	PK_DA_YHBK	744	346828	
                       SORT JOIN			1226	331736	1658680
                        INDEX FAST FULL SCAN	NNMIS	PK_DA_CBXX	171	331736	1658680
                      NESTED LOOPS ANTI			279	1	18
                       INDEX FAST FULL SCAN	NNMIS	PK_DA_CBXX	171	331736	1658680
                       INDEX UNIQUE SCAN	NNMIS	PK_DA_YHBK	0	346828	4508764
                 TABLE ACCESS FULL	NNMIS	DA_KHXX	1631	335809	51042968
             TABLE ACCESS FULL	NNMIS	DA_LHXX	879	331736	27202352
            FILTER					
             HASH JOIN RIGHT ANTI			74367	331735	31514825
              VIEW	NNMIS		70721	1056745	13737685
               UNION-ALL					
                HASH JOIN RIGHT OUTER			54237	720937	22349047
                 INDEX FAST FULL SCAN	NNMIS	SYS_C0057272	173	335809	1679045
                 VIEW	NNMIS		52462	720937	18744362
                  UNION-ALL					
                   HASH JOIN RIGHT OUTER			46713	346829	743948205
                    TABLE ACCESS FULL	NNMIS	SB_SBDA	883	374109	24691194
                    VIEW	NNMIS		10094	346829	721057491
                     UNION-ALL					
                      MERGE JOIN OUTER			9055	346828	621168948
                       TABLE ACCESS BY INDEX ROWID	NNMIS	DA_YHBK	1546	346828	591688568
                        INDEX FULL SCAN	NNMIS	PK_DA_YHBK	744	346828	
                       SORT JOIN			7509	331736	28197560
                        TABLE ACCESS FULL	NNMIS	DA_CBXX	931	331736	28197560
                      NESTED LOOPS ANTI			1040	1	98
                       TABLE ACCESS FULL	NNMIS	DA_CBXX	931	331736	28197560
                       INDEX UNIQUE SCAN	NNMIS	PK_DA_YHBK	0	346828	4508764
                   HASH JOIN RIGHT ANTI			5749	374108	29554532
                    VIEW	NNMIS		3050	346829	4508777
                     UNION-ALL					
                      MERGE JOIN OUTER			2771	346828	10751668
                       TABLE ACCESS BY INDEX ROWID	NNMIS	DA_YHBK	1546	346828	9017528
                        INDEX FULL SCAN	NNMIS	PK_DA_YHBK	744	346828	
                       SORT JOIN			1226	331736	1658680
                        INDEX FAST FULL SCAN	NNMIS	PK_DA_CBXX	171	331736	1658680
                      NESTED LOOPS ANTI			279	1	18
                       INDEX FAST FULL SCAN	NNMIS	PK_DA_CBXX	171	331736	1658680
                       INDEX UNIQUE SCAN	NNMIS	PK_DA_YHBK	0	346828	4508764
                    TABLE ACCESS FULL	NNMIS	SB_SBDA	883	374109	24691194
                HASH JOIN ANTI			16484	335808	6044544
                 INDEX FAST FULL SCAN	NNMIS	SYS_C0057272	173	335809	1679045
                 VIEW	NNMIS		15153	720937	9372181
                  UNION-ALL					
                   HASH JOIN RIGHT OUTER			11205	346829	10404870
                    INDEX FAST FULL SCAN	NNMIS	PK_CB_SBDA	181	374109	1496436
                    VIEW	NNMIS		10094	346829	9017554
                     UNION-ALL					
                      MERGE JOIN OUTER			9055	346828	621168948
                       TABLE ACCESS BY INDEX ROWID	NNMIS	DA_YHBK	1546	346828	591688568
                        INDEX FULL SCAN	NNMIS	PK_DA_YHBK	744	346828	
                       SORT JOIN			7509	331736	28197560
                        TABLE ACCESS FULL	NNMIS	DA_CBXX	931	331736	28197560
                      NESTED LOOPS ANTI			1040	1	98
                       TABLE ACCESS FULL	NNMIS	DA_CBXX	931	331736	28197560
                       INDEX UNIQUE SCAN	NNMIS	PK_DA_YHBK	0	346828	4508764
                   HASH JOIN ANTI			3948	374108	6359836
                    INDEX FAST FULL SCAN	NNMIS	PK_CB_SBDA	181	374109	1496436
                    VIEW	NNMIS		3050	346829	4508777
                     UNION-ALL					
                      MERGE JOIN OUTER			2771	346828	10751668
                       TABLE ACCESS BY INDEX ROWID	NNMIS	DA_YHBK	1546	346828	9017528
                        INDEX FULL SCAN	NNMIS	PK_DA_YHBK	744	346828	
                       SORT JOIN			1226	331736	1658680
                        INDEX FAST FULL SCAN	NNMIS	PK_DA_CBXX	171	331736	1658680
                      NESTED LOOPS ANTI			279	1	18
                       INDEX FAST FULL SCAN	NNMIS	PK_DA_CBXX	171	331736	1658680
                       INDEX UNIQUE SCAN	NNMIS	PK_DA_YHBK	0	346828	4508764
              TABLE ACCESS FULL	NNMIS	DA_LHXX	879	331736	27202352
          REMOTE		MR_GPS	0	1	9
    VIEW	SYS		0	1	6
     TABLE ACCESS BY INDEX ROWID	NNMIS	CB_SLB	4	1	17
      INDEX RANGE SCAN	NNMIS	IX_CB_SLB_HH_SFYF	3	1	
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Discussion on Golang's gc optimization strategy Discussion on Golang's gc optimization strategy Mar 06, 2024 pm 02:39 PM

Golang's garbage collection (GC) has always been a hot topic among developers. As a fast programming language, Golang's built-in garbage collector can manage memory very well, but as the size of the program increases, some performance problems sometimes occur. This article will explore Golang’s GC optimization strategies and provide some specific code examples. Garbage collection in Golang Golang's garbage collector is based on concurrent mark-sweep (concurrentmark-s

How to optimize settings and improve performance after receiving a new Win11 computer? How to optimize settings and improve performance after receiving a new Win11 computer? Mar 03, 2024 pm 09:01 PM

How do we set up and optimize performance after receiving a new computer? Users can directly open Privacy and Security, and then click General (Advertising ID, Local Content, Application Launch, Setting Recommendations, Productivity Tools or directly open Local Group Policy Just use the editor to operate it. Let me introduce to you in detail how to optimize settings and improve performance after receiving a new Win11 computer. How to optimize settings and improve performance after receiving a new Win11 computer. One: 1. Press the [Win+i] key combination to open Settings, then click [Privacy and Security] on the left, and click [General (Advertising ID, Local Content, App Launch, Setting Suggestions, Productivity) under Windows Permissions on the right Tools)】.Method 2

In-depth interpretation: Why is Laravel as slow as a snail? In-depth interpretation: Why is Laravel as slow as a snail? Mar 07, 2024 am 09:54 AM

Laravel is a popular PHP development framework, but it is sometimes criticized for being as slow as a snail. What exactly causes Laravel's unsatisfactory speed? This article will provide an in-depth explanation of the reasons why Laravel is as slow as a snail from multiple aspects, and combine it with specific code examples to help readers gain a deeper understanding of this problem. 1. ORM query performance issues In Laravel, ORM (Object Relational Mapping) is a very powerful feature that allows

C++ program optimization: time complexity reduction techniques C++ program optimization: time complexity reduction techniques Jun 01, 2024 am 11:19 AM

Time complexity measures the execution time of an algorithm relative to the size of the input. Tips for reducing the time complexity of C++ programs include: choosing appropriate containers (such as vector, list) to optimize data storage and management. Utilize efficient algorithms such as quick sort to reduce computation time. Eliminate multiple operations to reduce double counting. Use conditional branches to avoid unnecessary calculations. Optimize linear search by using faster algorithms such as binary search.

Decoding Laravel performance bottlenecks: Optimization techniques fully revealed! Decoding Laravel performance bottlenecks: Optimization techniques fully revealed! Mar 06, 2024 pm 02:33 PM

Decoding Laravel performance bottlenecks: Optimization techniques fully revealed! Laravel, as a popular PHP framework, provides developers with rich functions and a convenient development experience. However, as the size of the project increases and the number of visits increases, we may face the challenge of performance bottlenecks. This article will delve into Laravel performance optimization techniques to help developers discover and solve potential performance problems. 1. Database query optimization using Eloquent delayed loading When using Eloquent to query the database, avoid

What are the views in Word? What are the views in Word? Mar 19, 2024 pm 06:10 PM

I guess that many students want to learn the typesetting skills of Word, but the editor secretly tells you that before learning the typesetting skills, you need to understand the word views clearly. In Word2007, 5 views are provided for users to choose. These 5 views include pages. View, reading layout view, web layout view, outline view and normal view, let’s learn about these 5 word views with the editor today. 1. Page view Page view can display the appearance of the print result of the Word2007 document, which mainly includes headers, footers, graphic objects, column settings, page margins and other elements. It is the page view closest to the print result. 2. Reading layout view Reading layout view displays Word2007 documents and Office in the column style of a book

Laravel performance bottleneck revealed: optimization solution revealed! Laravel performance bottleneck revealed: optimization solution revealed! Mar 07, 2024 pm 01:30 PM

Laravel performance bottleneck revealed: optimization solution revealed! With the development of Internet technology, the performance optimization of websites and applications has become increasingly important. As a popular PHP framework, Laravel may face performance bottlenecks during the development process. This article will explore the performance problems that Laravel applications may encounter, and provide some optimization solutions and specific code examples so that developers can better solve these problems. 1. Database query optimization Database query is one of the common performance bottlenecks in Web applications. exist

How to optimize the startup items of WIN7 system How to optimize the startup items of WIN7 system Mar 26, 2024 pm 06:20 PM

1. Press the key combination (win key + R) on the desktop to open the run window, then enter [regedit] and press Enter to confirm. 2. After opening the Registry Editor, we click to expand [HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionExplorer], and then see if there is a Serialize item in the directory. If not, we can right-click Explorer, create a new item, and name it Serialize. 3. Then click Serialize, then right-click the blank space in the right pane, create a new DWORD (32) bit value, and name it Star

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