How does OBIEE generate the sql statements that are then run against the target database? I have a report that generates one SQL statement when executed against Oracle database and completely different when executed via jdbc driver against Apache Drill. My problem is that in the second case the query is not even syntactically valid.
I've read this - http://gerardnico.com/wiki/dat/obiee/query_compiler
but still don't understand the mechanism through which Oracle decides on the actual query to be executed based on the driver.
OBIEE uses a "common metadata model" known as the RPD. This has a logical model of your data, along with the physical data source(s) for it. When a user runs a report it is submitted as a "logical" query that the BI Server then compiles using the RPD to generate the necessary SQL query (or queries) against the data sources.
Whilst Hive and Impala definitely work with OBIEE, I've not heard of Drill being successfully used. If you've got the connectivity working then to sort out the query syntax it generates you need to fiddle with the DBFeatures configuration which OBIEE uses to understand what SQL statements are valid for a given database. So if Drill doesn't support, for example, INTERSECT, you simply untick INTERSECT_SUPPORTED (I'm paraphasing the exact dialog terminology).
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I am doing POC for Apache Zeppelin for reporting purpose. I created a JDBC Interpreter to connect Oracle database. This way our user can execute queries and generate reports. Currently they have to login through toad to fetch data/report every day. We must restrict that.
But problem is, they can also execute update/delete queries. I want our user to run the Select queries and not any DML queries or Inserts.
Is there a way to restrict it? I expected some setting in configuration,
I tried to look on their documentation but couldn't find any clue.
I need to run a performance comparison before activating Oracle TDE on our database (12c).
My idea was to monitor executed queries for a specific user (Java EE App Server) and then replay these queries on a cloned Oracle TDE instance to compare response times.
We found the Oracle AWR feature, however, in this report over 90% of the queries are "system" queries which were not triggered by the App Server's JDBC driver(, but by internal oracle jobs/optimizations?).
Is there some functionality to restrict AWR monitoring to only use queries of a specific user/driver or is there another functionality I could use for conducting my performance tests?
Thanks!
Oracle's Automated Workload Repository (AWR) captures all database activity. You have some flexibility in the depth of statistics it captures, but you can't filter the way you are asking for. When you product an AWR report, you will get everything the database performed, and specifically for the SQL data, you'll get the top or highest load SQL's. There are some additional thresholds you can set to get more SQL in the report, so instead of the top-10, you can get the top-50. This can be set as a default or per AWR report.
More can be found here
Oracle workload repository package
We have two divisions in our company, one uses E1 on Oracle 11g the other uses SAP on Oracle 11g.
We also have a SQL Server system we use to data warehouse information once a night from both system to run our report server against.
The question I have is for pooled tables in SAP, such as A016, how would I get that information out of SAP?
Currently we have SSIS's setup with a linked server to the two Oracle servers which pull the data we need I just don't have the knowledge of SAP to find the Pooled tables.
if I can't pull the pooled tables because they don't physically exist is there a tool I can use in SAP to find out what tables the pooled table is getting it's information from? This way I can rebuild that table in SQL using a open query and some fun Joins.
Thanks
You have to access those tables using the application server. They can't be accessed directly from the database.
You'll probably want to write an ABAP program to extract the data you need go from there.
I'm running into a problem while linking some tables and views present on a Oracle 11g database to a Access 2007 file.
I'm using the Oracle Client (SQORA32.DLL) version 11.02.00.03.
If the view/table returns a small amount of data, there's no problem. The problem happens when the view or the table returns a "large" amount of data. I've tried to increase the buffer size on the driver (default is 64000) to see if that happens. I've also removed the "Enable query timeout" option - otherwise I would get a "Query cancelled by user" or a "ODBC - Call Failed" error.
In order to link the tables/views, I've used the "native tool" (External Data -> ODBC Database -> Link to data source by creating a linked table).
I was wondering if I could retrieve the data from the tables/views using vba. Sometimes, I (you should read "I" as "the users") may need to update data on some tables (control tables).
Please let me know your thoughts.
EDIT: Our goal with this project was to migrate from SQL Server 2005 to Oracle 11gR2. After analyzing the behaviour of the Access files regarding the SQL Server, I've concluded that the results are showing like a "cursor" - if you scroll down on the result window, it will load more.
I think that this may be the issue because, AFAIK, Oracle (driver, maybe?) pulls everything from the DB and, only then, populates MS Access.
It's a long time after this so here goes the solution. MS access has a flag for the ODBC connection as "Treat Float as Numeric". This have made the trick.
I am trying to create db link from Oracle 11g to SQL Server 2005 using DG4MSQL gateway.
After creating db link I am not able to query SQL Server system views (sys.services or sys.objects) using JDBC driver, but I am able to query all user tables using JDBC driver.
If I use sqlplus, I am able to query all tables including system tables. Since my project is Java project, I am bound to use JDBC driver.
One more observation I made is that, if I use DG4ODBC instead of DG4MSQL gateway, then I am able to query all SQL Server tables including system tables using JDBC driver.
Please let me know if there are any ways I can query SQL Server system tables using DG4MSQL and JDBC driver?
this one is a little bit tricky to explain
An Oracle Gateway performs 3 types of operations:
SQL translations (when you query regular tables, views etc)
Data Dictionary translations (when you query system views)
Data Type transformations (for example Microsoft's date to Oracle's date)
In case of JDBC, the JDBC-ODBC bridge makes the JDBC driver perfectly compatible with the drivers included in DG4ODBC. Therefore, JDBC plus DG4ODBC allows you to perform all the transformations above.
The problem is that DG4MSQL uses a proprietary driver and only SQL translations can be bridged to JDBC.
As a solution to your issue, you could try to create local views on your Oracle schema, based on the remote SQL server system views. Depending on your requirements, you can even create them as materialized views.
CREATE OR REPLACE VIEW sys_services
AS SELECT *
FROM sys.services#dblink;
and then query sys_services instead of directly querying sys.services#dblink