Doubt about explan plan invalidation, by trigger creation
Hi all,
Another DBA told me that after trigger creation all explain plan on that table are invalidated and a new parse is necessary.
Is that true?
Tx,
Everson
You could put a test case together to examine how it works:
SQL> SELECT * FROM V$VERSION;
BANNER
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
PL/SQL Release 11.2.0.1.0 - Production
CORE 11.2.0.1.0 Production
TNS for 32-bit Windows: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production
SQL> DROP TABLE TAB1;
Table dropped.
SQL> CREATE TABLE TAB1(ID NUMBER);
Table created.
SQL> INSERT INTO TAB1 SELECT ROWNUM FROM DUAL CONNECT BY LEVEL <= 10;
10 rows created.
SQL> COMMIT;
Commit complete.
SQL> SELECT statname.name
2 , mystat.value
3 FROM v$mystat mystat
4 JOIN v$statname statname ON mystat.statistic# = statname.statistic#
5 WHERE statname.name IN ('parse count (total)','parse count (hard)')
6 ;
NAME VALUE
parse count (total) 653
parse count (hard) 145
SQL> SELECT COUNT(*) FROM tab1;
COUNT(*)
10
SQL> SELECT statname.name
2 , mystat.value
3 FROM v$mystat mystat
4 JOIN v$statname statname ON mystat.statistic# = statname.statistic#
5 WHERE statname.name IN ('parse count (total)','parse count (hard)')
6 ;
NAME VALUE
parse count (total) 658
parse count (hard) 147
SQL> SELECT COUNT(*) FROM tab1;
COUNT(*)
10
SQL> SELECT statname.name
2 , mystat.value
3 FROM v$mystat mystat
4 JOIN v$statname statname ON mystat.statistic# = statname.statistic#
5 WHERE statname.name IN ('parse count (total)','parse count (hard)')
6 ;
NAME VALUE
parse count (total) 662
parse count (hard) 147
SQL> CREATE OR REPLACE TRIGGER TRG_TAB1_RAFI
2 AFTER INSERT ON TAB1
3 FOR EACH ROW
4 BEGIN
5 DBMS_OUTPUT.PUT_LINE('Trigger Fired!');
6 END;
7 /
Trigger created.
SQL> SELECT statname.name
2 , mystat.value
3 FROM v$mystat mystat
4 JOIN v$statname statname ON mystat.statistic# = statname.statistic#
5 WHERE statname.name IN ('parse count (total)','parse count (hard)')
6 ;
NAME VALUE
parse count (total) 691
parse count (hard) 148
SQL> SELECT COUNT(*) FROM tab1;
COUNT(*)
10
SQL> SELECT statname.name
2 , mystat.value
3 FROM v$mystat mystat
4 JOIN v$statname statname ON mystat.statistic# = statname.statistic#
5 WHERE statname.name IN ('parse count (total)','parse count (hard)')
6 ;
NAME VALUE
parse count (total) 696
parse count (hard) 150
SQL>
SQL> spool off;
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I have some doubts about the possible uses of OBIEE. It happens that using OBIEE sometimes users demand report of an "analytical" type, that is aggregated analysis through OBIEE’s Answers, selecting data from dimension tables and measures from fact tables. That’s the ordinary purpose of business intelligence tools!!!
Some other times though, users demand to perform through Answers analyses of an "operating" type, that is simple extractions of some fields belonging to dimension tables, linked between each other through joins, (hence without querying fact tables): that happens because some of the tables brought in the datawarehouse are not directly linked to any fact table. In this way users want to use Answers to visualize data even for this kind of extractions (or operating reports).
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I'm configuring a Linux 64bits Forms/Reports 11g HA environment, the point is that i have two nodes, each one with its Forms and Reports servers, let's say FormsA and ReportsA for the first node and FormsB and ReportsB for the seconde node.
i want FormsA to be able to call reports from ReportsB and FormsB to be able to call reports from ReportsA.
I've been reading about REPORT_SERVERMAP
http://docs.oracle.com/cd/E12839_01/bi.1111/b32121/pbr_conf003.htm#autoId5
But i have some doubts about its use:
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2. The link provided says "Using RUN_REPORT_OBJECT. If the call specifies a Reports Server cluster name instead of a Reports Server name, the REPORTS_SERVERMAP environment variable must be set in the Oracle Forms Services default.env file"
In fact i'm using RUN_REPORT_OBJECT but
what is the Reports Server cluster name ?? and where do i find that name ??
3. Is this configuration well defined:
REPORTS_SERVERMAP=clusterReports:ReportsA;clusterReports:ReportsB
4. At forms applications when using RUN_REPORT_OBJECT, can i assume that the report server name will be the cluster name specified at the REPORTS_SERVERMAP ??
5. Which files should i modify rwservlet.properties or default.env ??
Hope you can help me :)
Regards
CarlosHi,
1. I will not use a shared cluster file system or any way of cache solution, i will only have my rdf files on each node, and i'm wondering if just by configuring this parameter i will be able to get the effect mentioned above ??
--> In such case what could go wrong is
Suppose Run_report_object executed jobs successfully to ReportsA
But web.show_document command for getjobid failed ( as ReportsA went down by this time)
--> You will not get the output shown ( though job was successful)
If shared cache was enabled, then Even if ReportsA is down, other cluster member ( say ReportsB)
will respond back to web.show_document.
Point 2,
--> Under HA is it highly recommended to use web.show_document ( a servlet call) to execute reports. This is to help use all HA features at the HTTP , Webcache or load balancer level.
However if there is migrated code or Run_report_object is must, then the recommendations as you see in the pointed document is must.
REPORTS_SERVERMAP setting needs to be configured in rwservlet.properties file and also in default.env Forms configuration file to map the Reports Server cluster name to the Reports Server running on the mid-tier where the Load Balancer forwarded the report request.
For example FormsA, ReportsA, cluster name say rep_cluster
default.env file
REPORTS_SERVERMAP=rep_cluster:ReportsA
Where "rep_cluster" is the Reports Server cluster name and "ReportsA" is the name of the Reports Server running on the same machine as FormsA
rwservlet.properties file
<reports_servermap>rep_cluster:ReportsA</reports_servermap>
At default.env this is not a valid entry
REPORTS_SERVERMAP=clusterReports:ReportsA;clusterReports:ReportsB
what is the Reports Server cluster name ?? and where do i find that name ??
--> This is created via EM on the report server side.
Would recommend to refer following documents at the myoracle support repository
How to Setup Reports HA (High Availability - Clusters) in Reports 11g [ID 853436.1]
REP-52251 and REP-56033 Errors When Calling Reports From Forms With RUN_REPORT_OBJECT Against a Reports Cluster in 11g. [ID 1074804.1]
Thanks -
Doubt about unicode conversion
Dear Friends,
I have a doubt about the unicode conversion. I have read (one server strategy) that I have to do export (R3load), delete the ECC 6.0 non-unicode, install an unicode database and then import with R3load. My doubt is about the deletion of ECC 6.0 non unicode. Why? can I convert to unicode only with an export (R3load) and subsequent import (R3load) without any deletion?. Obviously I must to change the SAP kernel with a unicode one. Is it correct?
Cheersyou can not convert a SAP System to unicode by just exchanging the executables from non unicode to unicode ones.
a non unicode SAP Oracle database is typically running with a database codepage WE8DEC or US7ASCII (well this one is out of support).
so every string stored in the database is stored using this codepages or SAP-Internal codepages.
When converting to unicode you have to convert also the contents of the database to unicode. As unicode implementation starts at a time where Oracle did not support mixed codepage databases (one tablespace codepage WE8DEC the other one UTF8) inplace conversions are not possible. To keep things simpler, we still do not support mixed codepage databases.
Therefore you have to export the contents of your database and import it to a newly created database with a different codepage if you want to migrate to unicode.
regards
Peter
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Saudações! Pessoal, estou enfrentando um problema ao tentar executar uma entrega pela VL01N, o sistema retorna a mensagem: u201CAtualizar fatores de conversão para / BRL (tipo câmbio M)u201D. O material, objeto desta entrega, deu entrada no estoque
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this is a new problem. Running Windows 7, latest update of Firefox 3.6.13. Under "Applications", I'm set to "open Adobe Acrobat inside Firefox" (which is what I have always done, then if I wanted to, I saved the PDF file elsewhere). should I/ can I o
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No connections in the combo box of Infobus Data Form Wizard?
I am trying to create a new project but when I try and select a connection, the "Connection" drop-down combo-box is empty. I have created 9 connections, but cannot select them. I have tried adding a new one and editing but still they do not appear. A
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Need Help - ipod video in trouble - white screen won't go away - help??
White Scree appears and won't go away. Can someone help?
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Change Customer Terms of Payment
Hi all, How can I change the terms of payment for several accounts at the same time? For example, all of the accounts for a particular customer. Is there a mass change? Thanks!