Heterogeneous Connectivity :: Oracle Gateway Plus Materialized View?
Sep 4, 2012
we have microsoft sql server, oracle gateway server (11G) and database server (10.2.0.5) we already make the full setup, and it's working.
we create materialized view into oracle server to read a data from sql server, but the refresh of MV take long time so we are planing to create the materialized view into oracle gateway server.
create MV into oracle gateway server?i mean i don't want to download oracle database instance for only one MV.
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Jan 27, 2013
Oracle 11gR2
Linux 6.x
Sybase 12 (on Windows)
unixODBC 3.2.x
Sybase Client 12
------------------------
Given the following files or structures that are important to the proper operation of the ODBC Gateway connecting to a remote Sybase database:
listener.ora
tnsnames.ora
initmydblink.ora ( my version of the initdg4odbc.ini )
dblink (not a file but the dblink in the Oracle database)
odbc.ini
odbcinst.ini
What files (and what properties within those files) may/must be changed if the remote Sybase db and system is different (i.e. the Sybase database source has been changed to something 'new')? For example, I can that the odbc.ini file is going to have to be alterer to point to the new database server IP address, database port, database name?
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Nov 12, 2013
Oracle 11g on linuxdestination : ms sql server 2005 i need to create the db link from oracle to ms sql server to view the tables , is it posibble without configuring the gateways( as looks like it is licenced product)
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Dec 5, 2012
I am working on oracle and pl/sql since some time. so just a novice. I don't know much about sql server or transact sql, etc..I have a requirement to create an interface between Oracle and sql server.
we have a database on oracle and another on sql server. my requirement is to create an interface between oracle and sql server and see how can I update one (or more) tables (I am guessing using pl/sql) on sql server.
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Oct 3, 2013
11.2.0.1. Using DG4ODBC to update data from oracle to sqlserver and vice-versa using dblinks?
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Mar 26, 2013
I have installed unixodbc 2.3.1, postgres odbc driver (psqlodbc-07.03) and dg4odbc 11.2..On querying : select sysdate from dual@dblink_postgresql, the following error occurs:
ORA-28500: connection from ORACLE to a non-Oracle system returned this message:
[unixODBC][Driver Manager]Can't open lib '/oracle/psqlodbc/lib/libpsqlodbc.a' : file not found {01000}
ORA-02063: preceding 2 lines from DBLINK_POSTGRES
Similar error appears in the trace file as well.
[unixODBC][Driver Manager]Can't open lib '/oracle/psqlodbc/lib/libpsqlodbc.a'
$ isql -v postgresql postgres postgres@2012
[01000][unixODBC][Driver Manager]Can't open lib '/oracle/psqlodbc/lib/libpsqlodbc.a' : file not found
[ISQL]ERROR: Could not SQLConnect
However the file is present in the location and has no permission related problems.
$ pwd
/oracle/psqlodbc/lib
$ ls -lrt
total 2952
-rwxr-xr-x 1 oracle oinstall 663 Mar 25 15:28 psqlodbc.la
-rw-r--r-- 1 oracle oinstall 731419 Mar 25 15:28 libpsqlodbc.a
-rw-r--r-- 1 oracle oinstall 12215 Mar 25 22:11 win_md5.o
-rw-r--r-- 1 oracle oinstall 18100 Mar 25 22:11 options.o
[code]....
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Dec 2, 2010
We are planning on interfacing Oracle to SQL server connectivity, I'm researching on how to create a dblink to SQL server 2005. I'm a little confused between Generic connectivity and Transparent Gateways..
I think Transparent Gateway is not free and needs to be licensed, is it better in terms of performance? Also, do I need to configure this gateway on a seperate server?
I think Generic connectivity can be configured on the same Oracle database server itself.. but I see there could be some performance issues with it..
We are running on Oracle 10.2, looks like HSODBC is not available in 10g?
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Feb 14, 2013
select from the postgre databse works just fine (however when i select data column alone it returns as date, if i select it together with som condition in where clause it returns varchar).
-- this runs ok
select
t."idbill",
t."idpoint"
from "crm"."bills2points"@dl_carecloud t
,"crm"."bills"@dl_carecloud brg
where 1=1
and t."idbill" = brg."idbill"
and t."idbill" = 9685;
[code]....
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May 30, 2013
We have a requirement to connect from 9.2.0.8 database on AIX to MS SQL 2008R2 .
Source :
----------
Oracle : 9.2.0.8 (64 bit)
OS : AIX - 4.3.3.0/5.3.0.0 (64-bit)
Target :
----------
MS SQL : 2008R2
OS : Windows 2008 (64-bit)
1] Can we use - Database Gateway for SQL Server for the above set up ? If so , does this require a separate license ?
2] Where Do we need to install the "Database Gateway for SQL Server " -- soruce or target server ?
3] Is there any other solution apart from using "Database Gateway for SQL Server " ?
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Oct 24, 2012
How can I to connect and execute query from Oracle without to use others products ( DG4MSQL ....etc) ?using 9.2.08
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Jul 19, 2012
I am trying to configure HS for Excel file. I am getting following error:
SQL> select table_name from all_tables@ODBCEXCEL;
select table_name from all_tables@ODBCEXCEL
*
ERROR at line 1:
ORA-28513: internal error in heterogeneous remote agent
ORA-02063: preceding line from ODBCEXCELHeres my setup:
[code]....
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Aug 21, 2012
Oracle Corporation --- TUESDAY AUG 21 2012 11:17:46.685
Heterogeneous Agent Release 11.2.0.1.0 - 64bit Production Built with Oracle Database Gateway for ODBC
oracle server NLS_CHARACTERSET is UTF8 and mysql server Character set is UTF8, how should i configure the parameters HS_LANGUAGE(initsid.ora) and CHARSET(odbc.ini)? now i
configure the CHARSET = UTF8 and HS_LANGUAGE=AMERICAN_AMERICA.WE8ISO8859P15,but the sql query reslut like this:
SELECT "id","name" FROM "accounts"@LNMYSQL
_______________________________________
xy-20120712-00016728 é士焱
the name Column is Garbled.
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Jun 16, 2012
i have created the DB LINK from Oralce 11gR2 to MS Sql Server 2005,able to access the view of Sql Server from Oralce,but the Columns which have Datatype nvarchar(max) in Sql Server am not able to access through DB Link.
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Nov 8, 2012
I am using oracle 11g express edition and MY Sql database How to establish database link between them using ODBC gateway. I am using ODBC gateway Mysqlodbc connector.
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Jul 5, 2011
I have created a Materialized View (MV) and within the MV DDL have included a statement as per below. However, the MV does not seem to be refreshing on a daily basis. I can see the job in dba_jobs table. So the question, is there some system setting i need to execute or create in order for Oracle to know that it needs to run the Job defined in the dba_jobs table on a daily Basis?
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Jun 16, 2008
We are using Oracle 10g rel 2. The replication is setup on 1 server which is in City A, and the snapshot server is in City B.
City A .
Create materialized view log on table-a
with primary key
including new values.
City B database.
Create user test_rep identified by test
grant connect, resource, create any materialized view , table, view , procedure to test_rep.
Create materialized view city-A_db_MV
refresh fast
select * from cityA.Tablea@city-Adb
When i select from city-A_db_MV, it showed the complete table-A of city-A database.
Now if we make any changes to City-A table at the Master site, will it be propagated automatically to the MV site.
I guess we need to create jobs to push / or refresh fast .. isnt it. But exactly how to do it is a question.
Secondly if we make a replication group at Master site at city-A db, how do we refresh that Group and how to monitor whether it is refreshing on time or not? do we need to see the jobs every now and then.
but still a lot of questions unanswered, even though i had read the documents earlier.
1-The MView was created without identifying that after what interval it will be fast refreshed.
2- How to Manually refresh it. Does it support On Commit, I think it is not.
3- Where should be we make a group and then add the table to that group and refresh that group.
Should this group belongs to the Master Site or to MV site?
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Sep 10, 2013
My materialized view has to get refreshed as part of a scheduled package. When I refresh the materialized view manually using the following statement,
DBMS_MVIEW.REFRESH('info.sales_fact_load_mv', 'C');
it is working fine. However, when I use the same statement in the package which is scheduled to run every morning, it is not working. What could be the reason?
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Apr 5, 2012
We have the task to create to Materialized view from oracle 10g to 8i. - Will we face any kind of issue after creation of Materialized view. check what the prerequisite need to be verified is.
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Apr 6, 2010
I have a database schema with a Materialized View (MV) that updates a products table shown on a website. This schema was recently imported to an 11g database from 8i, but since this import I have been unable to refresh my schema's Materialized View.
The MV_PRODUCT_MASTER Materialized View attaches price data to product data that is stored in a normal WEB_PRODUCT table, and create an MV table as a result. The output MV table is what the website pulls data from to display to the site users. Since it is an MV table, this table cannot be edited directly. In order to change, say, a product description, I need to alter the description field in WEB_PRODUCT and manually refresh the MV_PRODUCT_MASTER table. Only through the refresh will the upstream edits appear in the MV_PRODUCT_MASTER table and be visible on the website.
In my old 7.6.0.11 copy of TOAD, I could manually refresh these MVs easily, by opening the "Snapshots" tab, right clicking on the MV I wanted to refresh and selecting the "Refresh" option. Since the schema was imported to 11g, I have been using the Oracle SQLDeveloper tool to manage the schema. SQLDeveloper doesn't have a clear method for manually refreshing an MV, or else the method I am using isn't working.
If I right click on the MV_PRODUCT_MASTER Materialized View object, and choose "Other Actions", I see the following choices:
Shrink Materialized View
Compile Materialized View
Force Materialized View Refresh
Rebuild Materialized View
I assumed that -Force Materialized View Refresh- was the right choice, and chose that. This option displays the SQL:
alter materialized view "WEBADMIN"."MV_PRODUCT_MASTER" consider fresh
When I apply this, I get the message: Materialized view - MV_PRODUCT_MASTER - has been set torefreshed. However, no changes appear in the MV output table. i.e. if I make a specific change to a row in the WEB_PRODUCT table, the change is not being carried into the MV_PRODUCT_MASTER table, so that indicated that the refresh is not actually happening. The MV table appears to believe it is being refreshed:
REWRITE_CAPABILITY GENERAL
REFRESH_MODE DEMAND
REFRESH_METHOD COMPLETE
BUILD_MODE IMMEDIATE
FAST_REFRESHABLE NO
LAST_REFRESH_TYPE COMPLETE
LAST_REFRESH_DATE 06-APR-10
STALENESS UNKNOWN
But it isn't showing any changes.What am I doing wrong? Is there a plain SQL statement I can run in order to run these refreshes, instead of using the SQLDeveloper GUI?
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Nov 13, 2009
One question reg Materialized views.
If as part of housekeeping of the Source database we delete some records (older records), will the materialized view also be updated with the deletion? I believe the answer is yes. In that case can we ensure that this delete does not happen?
Is there anyway we can prevent MView refresh from deleting the records that is once inserted even if we delete the same records in source DB?
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Nov 15, 2007
I have created 5 materialize view with REFRESH FORCE option.
REFRESH is done with every 10 min.
My destination database is MySQL.
DBlink is created in ORACLE 10g
Materialize view is created using DBLINK.
Since refresh materialize view done with every 15 min, my Redo generate gone on toss.System is generating 1 redo file for 1 min. The size for redo log is 500MB.Since materialize views are created base on mysql table, system is doing complete refresh every time which causing to generate more and more redo.
Is there any setting/option/or solution to reduce high redo generation.
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Jan 17, 2013
can we change the existing materialized view to normal view? if yes how?
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Dec 11, 2012
I'm trying to create a Materialized View on a remote database from a simple view. The reason is, the data owners don't want to grant explicit tables privileges to external subscribers.
A new schema is created to publish data in the form of a view. I've created mlogs on the master tables, and granted them to the subscriber, but it's still complaining about a missing primary key on the view. A primary key does exist in the master table.
Is there another work around for this situation without having to work inside the data sources' environment?
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May 2, 2012
I have a materialized view "pro_mview",I am trying to refresh the MVIEW by using the following statement.
EXEC DBMS_MVIEW.REFRESH('pro_mview','C');
But I am getting the below error.
*
Error at line 1:
ORA-12008: error in materialized view refresh path
ORA-00942: table or view does not exist
ORA-06512: at "SYS.DBMS_SNAPSHOT", line 2256
ORA-06512: at "SYS.DBMS_SNAPSHOT", line 2462
ORA-06512: at "SYS.DBMS_SNAPSHOT", line 2431
ORA-06512: at line 1
I am able to fetch the data from that materialized view(pro_mview).
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Apr 26, 2011
difference between view and materialized view?
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Aug 12, 2013
what would be the difference between a view and a materialized view? whether DML possible on a view? i think error occurs if DML tried on a view which is a combination of two or more tables, whether DML possible on a materialized view?
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May 17, 2011
But i do a lot of work-arounds to make sure the installation does not make corrupt my OracleAgent,OracleService and OracleDataGatherer. If i just let the installation do its thing i have problems with my libraries, and can't start anything.
The errors are : Procedure entry point 'BlaBla' could not be located in the Dynamic Link library 'AnyName'.
I notice that i have 2 versions of the libraries in OracleHomeBIN (one version 8, one version 11). The programs that start the OracleAgent,Service and DataGatherer call the old libraries but expect to find values that can be found only in new libraries.
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Mar 11, 2013
I want to connect ORACLE-11gR2 that is on linux with an MS sql server. DO i need to use some third party drivers like easy soft ? Can i configure the database gateway without any third party drivers ?
Secondly if my oracle is on linux, can i configure the gateway on a seperate windows machine(that will connect to linux oracle and ms sql server) as i have found the gateway installation setup only for windows version.
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Dec 5, 2011
where can i download the oracle gateway for sql server? i can't find the download web site .
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Jul 7, 2010
I have requirement to create materialized views. The design states to use Complete refresh. Now I am using WITH ROW_ID clause.
1. Question - what are the criteria to decide between WITH PRIMARY KEY & WITH ROW_ID clauses? I referred oracle doc, but couldn't exactly get this.
2. Background - The oracle doc mentions that - Primary key materialized views are the default type of materialized view. The master table must contain an enabled primary key constraint, and the defining query of the materialized view must specify all of the primary key columns directly.
Question - I saw some existing materialized views in my project using WITH PRIMARY KEY clause, but all of the primary key columns are not part of the Select query, but still these views are working fine, how is this possible?
3. Background - The oracle doc mentions that - Rowid materialized views must be based on a single table and cannot contain any of the following:
■Distinct or aggregate functions
■GROUP BY or CONNECT BY clauses
■Subqueries
■Joins
■Set operations
Question - But I have created a Rowid materialized view selecting data from more than one table & defining query involving outer joins. This materialized view got created & getting refreshed (complete refresh). But again this is contradicting with Oracle' statement.
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