Why index is not used on an editable view update?

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  and pi2.merchant_id = pi.merchant_id

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  CREATE INDEXES TO PROCESSING_INSTRUCTION IDX_PI_CLIENT_MERCHANT_STATUS

  (CLIENT_NO, MERCHANT_ID, STATUS)

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  I'm sure there may be a better way to do this, but...

  Please notify.

  Concerning

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• This index is not used

  Hi forum

  Dynamically generated in this query:

  SELECT TITULO_MEDIODEPAGO AS TITLE, IDA_MEDIODEPAGO AS IDA, COUNT (DISTINCT VISTA. ID1 | VISTA. ID2. VISTA. ID3) AS AMOUNT

  OF MVISTA VISTA

  WHERE ((COALESCE (VISTA. FECHAEXPIRACION, TO_DATE (' 01/01/9999 ',' dd/mm/yyyy ""))) > = SYSDATE) AND

  ((1=1) OR: p_rubro IS NULL) AND ((1=1) OR: p_subrubro IS NULL) AND

  (VISTA. TITULO_PROVINCIA =: p_provincia) AND ((1=1) OR: p_ciudad IS NULL) AND

  ((1=1) OR: p_barrio IS NULL) AND ((1=1) OR: p_mediopago IS NULL) AND

  ((1=1) OR: p_nrocuotas IS NULL) AND ((1=1) OR: p_porcentaje IS NULL) AND

  ((1=1) OR: p_dias IS NULL) AND ((1=1) OR: p_textoBusqueda IS NULL)

  TITULO_MEDIODEPAGO GROUP, IDA_MEDIODEPAGO

  : p_rubro is null

  : p_subrubro is null

  : p_provincia = "PROV1.

  : p_barrio is null

  : p_mediopago is null

  : p_nrocuotas is null

  : p_porcentaje is null

  : p_dias is null

  : p_textoBusqueda is null

  When I inspect the plan to explain it, I could see a full analysis on the materialized view MVISTA operation. I want to avoid this analysis complements the view with 500 k lines:

  MAT_VIEW_ACCESS						MVISTA

  Filter predicates

  	AND
  		NLSSORT (VISTA. TITULO_PROVINCIA, "nls_sort = 'BINART_AI'") = NLSSORT (: P_PROVINCIA "nls_sort =" BINARY_AI"')
  		COALESCE (VISTA. FECHAEXPIRACION, TIMESTAMP'9999-01-01 00:00:00 ') > = SYSDATE @!

  I add an index to the materialized view 'MVISTA' TITULO_PROVINCIA (CSA) and FECHAEXPIRACION (CSA) fields, but it is not used by the query. Why the index is not used? How to define the index serve him?

  Thank you very much

  One of the reasons for the index is not used because you apply the function nlssort on a single column.

  You must use an index of feature based using this function instead.

  In addition, I would rewrtite him coalesce to

  (VISTA. FECHAEXPIRACION > = SYSDATE or VISTA. FECHAEXPIRACION is null)

• Index is not used, although suspicion.

  DBVersion: 10.2.0.3
  

   CREATE TABLE "ESW"."DURCHLAUFZEIT_SONDER_AG" 
     (     "AG" NUMBER(3,0) DEFAULT 0 NOT NULL ENABLE, 
       "TAGE" NUMBER(5,0) DEFAULT 0 NOT NULL ENABLE, 
       "ABTEILUNG" VARCHAR2(20 BYTE), 
  
  Content of this table
  AG    TAGE  ABTEILUNG
  910     1     EAV
  133     1     TG
  743     2     TM
  719     2     TM
  706     2     TM
  979     10     TM

  When I use a select statement like that no index on tabel 'walze w2' is used:
  

  select /*+ index(apl(arbeitsgang_nr))*/
         /*+ index(w2 WALZE_IND1)*/
          SUM (dsa.tage) tage,
           w2.walzen_nr walzen_nr,
          w2.walzen_ng walzen_ng
        from durchlaufzeit_sonder_ag dsa,
             auftrag_arbeitsplan apl,
             walze w2
        where apl.arbeitsgang_nr in
            ( select dsa1.ag ag
              from durchlaufzeit_sonder_ag dsa1
              where dsa1.abteilung = 'TM' )*and apl.auftr_nr = w2.auftr_nr
  and apl.auftr_jj = w2.auftr_jj
  and apl.auftr_pos = w2.auftr_pos
  and apl.auftr_los = w2.auftr_los
  and dsa.abteilung = 'TM' 
  and dsa.ag = apl.arbeitsgang_nr
  GROUP BY w2.walzen_nr,
       w2.walzen_ng;
  
  --------------------------------------------------------------------------------------------------
  | Id  | Operation                       | Name                           | Rows  | Bytes | Cost  |
  --------------------------------------------------------------------------------------------------
  |   0 | SELECT STATEMENT                |                                |    21 |  1155 |  4927 |
  |   1 |  SORT GROUP BY                  |                                |    21 |  1155 |  4927 |
  |*  2 |   HASH JOIN                     |                                |    21 |  1155 |  4922 |
  |   3 |    NESTED LOOPS                 |                                |   333 | 11655 |  4682 |
  |   4 |     NESTED LOOPS                |                                | 16215 |   427K|  4682 |
  |   5 |      TABLE ACCESS BY INDEX ROWID| DURCHLAUFZEIT_SONDER_AG        |     4 |    40 |     2 |
  |*  6 |       INDEX RANGE SCAN          | DURCHLAUFZEIT_SONDER_AG_INDEX1 |     4 |       |     1 |
  |   7 |      TABLE ACCESS BY INDEX ROWID| AUFTRAG_ARBEITSPLAN            |  4054 | 68918 |  1170 |
  |*  8 |       INDEX RANGE SCAN          | AUFTRAG_ARBEITSPLAN_IND3       |  4054 |       |     7 |
  |*  9 |     INDEX RANGE SCAN            | DURCHLAUFZEIT_SONDER_AG_INDEX2 |     1 |     8 |       |
  |  10 |    *TABLE ACCESS FULL*            | WALZE                          | 75432 |  1473K|   239 |
  --------------------------------------------------------------------------------------------------

  When I run the same sql to the delivery of the selection from tabel 'durchlaufzeit_sonder_ag' by my own index is used:

  select /*+ index(apl(arbeitsgang_nr))*/
         /*+ index(w2 WALZE_IND1)*/
          SUM (dsa.tage) tage,
           w2.walzen_nr walzen_nr,
          w2.walzen_ng walzen_ng
        from durchlaufzeit_sonder_ag dsa,
             auftrag_arbeitsplan apl,
             walze w2
        where apl.arbeitsgang_nr in
                        ( 743, 719, 706, 979 )
  and apl.auftr_nr = w2.auftr_nr
  and apl.auftr_jj = w2.auftr_jj
  and apl.auftr_pos = w2.auftr_pos
  and apl.auftr_los = w2.auftr_los
  and dsa.abteilung = 'TM' 
  and dsa.ag = apl.arbeitsgang_nr
  GROUP BY w2.walzen_nr,
  w2.walzen_ng;
  
  ---------------------------------------------------------------------------------------------------
  | Id  | Operation                        | Name                           | Rows  | Bytes | Cost  |
  ---------------------------------------------------------------------------------------------------
  |   0 | SELECT STATEMENT                 |                                |     2 |    94 |  1161 |
  |   1 |  SORT GROUP BY                   |                                |     2 |    94 |  1161 |
  |   2 |   TABLE ACCESS BY INDEX ROWID    | WALZE                          |     1 |    20 |     2 |
  |   3 |    NESTED LOOPS                  |                                |     2 |    94 |  1156 |
  |*  4 |     HASH JOIN                    |                                |    31 |   837 |  1094 |
  |   5 |      INLIST ITERATOR             |                                |       |       |       |
  |   6 |       TABLE ACCESS BY INDEX ROWID| DURCHLAUFZEIT_SONDER_AG        |     3 |    30 |     2 |
  |*  7 |        INDEX RANGE SCAN          | DURCHLAUFZEIT_SONDER_AG_INDEX2 |     3 |       |     1 |
  |   8 |      INLIST ITERATOR             |                                |       |       |       |
  |   9 |       TABLE ACCESS BY INDEX ROWID| AUFTRAG_ARBEITSPLAN            |  2276 | 38692 |  1091 |
  |* 10 |        INDEX RANGE SCAN          | AUFTRAG_ARBEITSPLAN_IND3       |  2276 |       |     8 |
  |* 11 |     INDEX RANGE SCAN             | WALZE_IND1                     |     1 |       |     1 |
  ---------------------------------------------------------------------------------------------------

  I don't understand this. Why oracle do not use index (provided in the indicator) when I select the values in the durchlaufzeit_sonder_ag table, but when they provide my own values, it uses the index?

  As far as I know only the first comment of suspicion in a given query block is considered.

  So it would be valid (unless hint_one is specified correctly)...

  SELECT /*+ hint_one hint_two */
         column_name
  FROM   table_name;
  
  SELECT /*+
         hint_one
         hint_two
         */
         column_name
  FROM   table_name;
  
  SELECT /*+ hint_one
         hint_two */
         column_name
  FROM   table_name;
  
  SELECT --+ hint_one hint_two
         column_name
  FROM   table_name;
  

  But this should not (regardless of if hint_one is specified correctly)...

  SELECT /*+ hint_one */
         /*+ hint_two */
         column_name
  FROM   table_name;
  

  Also I do not believe your INDEX index specification is correct, a single set of brackets should be used and the alias name and index table must be separated by a space or a comma.

  So it would be nice...

  SELECT /*+ INDEX (table_alias index_name) */
         column_name
  FROM   table_name;
  
  SELECT /*+ INDEX (table_alias, index_name) */
         column_name
  FROM   table_name;
  

  But it would not...

  SELECT /*+ INDEX (table_alias (index_name)) */
         column_name
  FROM   table_name;
  

  Also, you should be aware that an INDEX indicator is only considered provided that supports a given join order.

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• Why can I not use hidden or display point only to store the value for insertion?

  Hi, gurus:
  
  I have a question:
  
  I implemented a form with the region of report in a page, the update works OK, but the add function has a problem:
  
  There is a column, offender_ID, which is a foreign key to another table, it must not be null during insertion. However, even I pass the ID of the author of the offence of master page when user click on the button create and he did watch in the form, it must be a text tabled for insert success, why can I not use hidden or display point only to store this value for insert? (If I use hidden or display single element insert will be successful, apex reports I tried to insert a null value for the offender_ID column.)
  
  Thanks in advance.
  
  Sam

  Hello

  There is a column, offender_ID, which is a foreign key to another table, it must not be null during insertion. However, even I pass the ID of the author of the offence of master page when user click on the button create and he did watch in the form, it must be a text tabled for insert success, why can I not use hidden or display point only to store this value for insert? (If I use hidden or display single element insert will be successful, apex reports I tried to insert a null value for the offender_ID column.)

  I think that both hidden and display elements have attributes that can cause problems because of different ways these function elements as the only non-display and feature no hidden items. The only items have a "Save Session State' yes/no 'control'? This can be a problem.

  Would you do that? Do these regular items instead and see if you can get those working. Then, we will try to change the fields back to hidden or display only.

  Howard

  Congratulations. I'm glad you found the solution.

  Published by: Howard (in training) April 11, 2013 10:26