Questions tagged [dblink]
For questions about the Oracle feature that allows accessing data in a different database, or possibly on a different server.
75
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17
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Why is dblink nested function rolling back?
I assumed that dblink function were not rolledback, but in the use case below it is.
To summarize:
Function1 is a dblink call creating a table.
Function2 calls function1. Function2 is defined as ...
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131
views
Copy a partition from one database to another in postgres
I have a range (day wise) partitioned table managed using pg_partman extension and replica of the same is created in a different database.
I want to copy a partition specific of that day into another ...
0
votes
1
answer
38
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postgres_fdw: from where, is the resource utilized? remote or local?
I have an OLTP database and ETL jobs are running in the same database in the background.
I was thinking of separating the OLTP and ETL instances so that resource utilization would be distributed. ...
- 134
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0
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208
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Is it safe to sync Oracle 19c to 12c via dblink?
Source database: Oracle 19c
Target database: Oracle 12c, via dblink
Is it safe to sync tables from a higher version to a lower version?
I will create a materialized view on the target with scheduled ...
- 11
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0
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54
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Can I run scheduled job as sysdba?
I have user c##admin in my core DB (Oracle 19c), with "sysdba" privileges.
I want it to select from a pdb using a database link without giving a password.
assuming the following:
PDB Name: ...
- 862
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1
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179
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POSTGRESQL table replication between 2 servers
I want to to replicate A TABLE from one server A to another B so that A and B always in-sync.
This table on server A has like 4 - 5 million rows, whereas the table B is empty.
What I want to do is ...
- 147
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1
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376
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How to convert UTF8 data from PostgreSQL to AL32UTF8 Oracle DB?
I have a task to import some data from Postgres database to Oracle via dblink
The connection between Postgres and Oracle works good, but unfortunately, when I try read data from created view (in ...
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0
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329
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ORA-00997: illegal use of LONG datatype error when query from oracle to mysql over dblink
I created a db link from Oracle (19c) to MySQL (8.0). My MySQL table's columns datatypes are text (I mustn't change the datatype). There are 126 columns in the table (It must be such). When I try to ...
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0
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145
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Oracle 12c - Opening cursor with remote tables over db link
We just upgraded from 11g SE to 12c SE. Please note, this process worked perfectly under 11g, and only started failing once under 12c.
The procedure puts together a query, and then opens up a REF ...
- 141
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1
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657
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Same user cannot 'see' view on remote oracle database athough dblink is valid
I am running an impdp job that I have extracted the DDL from to determine why the job hangs. It consistently stops on the first object created using a dblink. I am running the impdp job as system as ...
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1
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78
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MV on remote/master table fails to resume syncing (after master db host was temporarily unreachable)
I have a fast-refresh materialized view in a target db (18c) that syncs from a remote table/master db (19c):
--master db (19c)
create materialized view log on master.workorder with primary key;
--...
- 1,427
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2
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1k
views
Create fast-refresh MV over dblink on table without PK?
I want to create a materialized view between a primary system (Oracle 18c) and an external system (Oracle 19c) via a dblink.
The MV would refresh on a 30-second schedule (since on-commit is not ...
- 1,427
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1
answer
755
views
Materialized view not purging (over dblink via view)
I've created a materialized view between a primary system (Oracle 18c) and an external system (Oracle 19c):
create materialized view primary_system.workorder_mv
build immediate
refresh force
on ...
- 1,427
0
votes
1
answer
2k
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inserting blob/clob over dblinks
I'm trying to find the best way to load a remote table with a blob column (blob only contains text, so clob would have been better).
So far we've been able to reduce loadtime from 218 minutes to 2 ...
1
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3
answers
5k
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Can an Oracle 19c database dblink to an Oracle 10.2.3 database?
I have an Oracle 12.1.0.2 database that dblinks to an Oracle 10.2.0.3.0 database.
I am upgrading the Oracle 12.1.0.2 database to 19c (12.2.0.3).
Will my dblinks to the Oracle 10.2.0.3.0 database ...
- 13
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2
answers
474
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Postgresql MVIEW refresh from Oracle Materialized View Log
Is it possible for me to have Oracle MVIEW log in my source database and refresh a Postgresql database MVIEW using this MVIEW log? I know I can query the MVIEW log, I have done that. But since it is ...
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1
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16
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Query Oracle Database On Who Has Create Database Link Privs (private)?
Anybody know a good way to query the entire Oracle database on what users have privs to make private database links? Thank you!!
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0
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258
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Transport-level error when I try to launch a select from SQL Server to Oracle via Dblink
I'm trying to launch a select from Sql Management Studio (SQL Server 2014) on a DBlink that points on an Oracle database that is handled by another company. The results begin to come back to the ...
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1
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2
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296
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SQL Server Agent crashes when scheduled procedures make select in DBLink on an offline Oracle database
I have SQL Server 2014 and I'm using SQL Server Agent to start some scheduled procedures during the day. These procedures make some selects (in DBlink) on an Oracle database that is handled by another ...
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1
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1k
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How to get TNS connect strings (like tnsping) to check a dblink via a session?
I would like to know, if there is any chance to get the currently used TNS connect string, that will be used for a DB-Link from a db-server.
I'm connected to a schema on a database located on any ...
1
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0
answers
270
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ORA-02063 Encoding problem with Oracle querying SQL Server through ODBC link
We have a problem querying some data from the SQL Server from the Oracle database with the ORA-LNX connecting to SQL-SRV using ODBC and Heterogeneous Service (Oracle HS).
When we send the query ...
- 111
1
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1
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2k
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How to securely store the password for an Oracle DB link?
Having a system consisting of two linked Oracle DBs, we currently have the password for the dblink stored in a table, in order to be able to change it (session issues) and to re-created the dblink in ...
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3
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808
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Is Oracle DBLink Vulnerable? [closed]
We have a web page on internet that calls a web service located on our intranet.
The web service talks to Database A to get some data.
Database A has a DBLink to Database B. This link is used to ...
- 139
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2
answers
2k
views
Azure Database Link to another Azure database
How to query between two databases with the same server in SQL Database?
Currently we are aiming to link two azure databases that will update simultaneously.
Thanks!
- 29
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1
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739
views
How do you select "array"-type columns via the DBLINK function?
Using PostgreSQL, I can easily do a select statement to return a column that is an array of the datatype point. i.e. colA is the datatype point[]
select colA from tbl
Returns a column that contains ...
- 2,278
1
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0
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182
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Oracle procedure takes forever to compile if I use public synonym
I have a procedure that queries a table through a DB link. If my procedure uses a public synonym through the DB link, it takes forever to compile.
I'm creating the procedure in Oracle 12c. The DB ...
- 11
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votes
2
answers
387
views
Issue with Identifiers in Postgres greater than Oracle's limit while connecting over ODBC (DBLINK)
We have a database link from Oracle 12.1 to Postgres via psqlODBC Driver. There is a problem while running few queries/statements when the Postgres identifiers, like the length of a column name ...
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2
answers
8k
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PostgreSQL error: remote query result rowtype does not match the specified FROM clause rowtype, on remote function call
This is my remote function:
CREATE OR REPLACE FUNCTION public._test1()
RETURNS record
LANGUAGE plpgsql
AS $function$
DECLARE
rec record;
BEGIN
select 1,2 into rec;
return rec;
END $function$;
...
- 143
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0
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2k
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Oracle dblink to MS SQL Server
Can I create a dblink to a SQL Server from Oracle, in the same I would if I was creating a dblink from Oracle to Oracle?
I've tried, but get a message saying -
connection has closed as partner has ...
- 181
2
votes
1
answer
767
views
How to parallelise remote queries in Postgres
I am querying N tables remotely using dblink.
This queries represent a sort of "sharding" of the data.
Each remote query takes roughly the same time (~ 0.5 sec).
However when I gather all the data in ...
- 1,153
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1
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3k
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Postgresql: Select a table from different database and different host
I know this is not new, but I have not found a solution, even though I have followed several posts in this forum.
I'm trying to show table from different database using dblink extension.
Installing ...
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1
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1
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4k
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How to Oracle DBLink encryption
I have the environment that I explain below and I need to encrypt the data that is sent between my two nodes, I have been reading but I can not find the right solution, I explain:
I have an Oracle ...
- 125
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2
answers
674
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Can I use postgres_fdw without foreign tables defined?
I have a production database "PRODdb1", with a read-only user account. I have a need to query(select statement) this database and insert the data into a secondary database named "RPTdb1". I originally ...
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1
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1k
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Unable to query remote schema object using partial database link name
I came across a very interesting situation today and I'm putting this question to the community in hopes that someone can explain why this happened. I haven't been able to find an explanation in ...
- 131
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vote
1
answer
1k
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How to access PostgreSQL Functions from Oracle through DBLink?
I'm having two DB server (PostgreSQL, Oracle).
I'm able to access the table in PostgreSQL from Oracle through DB-Link.
I've use the below query to access the table.
select "Cust_Id", "Mobile_No" ...
- 483
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votes
5
answers
11k
views
IN clause too slow
Ive been searching for about 1 hour and i have not found anything.
I have this problem:
When I do this query:
select order_id
from or_order@smartflex
where order_id in ( select distinct numeroot ...
- 21
1
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0
answers
416
views
Connect ORACLE to SQLSERVER to REMOTE SQL SERVER
I have Sql server and oracle installed on same machine. So I created a heterogeneous connection between the two server. Now I need to do some transaction in my sql server and need to send the result ...
- 209
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1
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2k
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Unable to access tables in sql server using oracle dblink
I have created a Heterogeneous connection between oracle and sql server. and tested with below query,
SELECT * FROM sys.tables@SQLSERVER;
Then I have created a new Database in SQL server called "...
- 209
1
vote
1
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419
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Auditing authentication issues in a distributed environment
I'm trying to get a better handle on what locked out a specific user when multiple Oracle databases are involved using database links.
Setup:
sqlplus kjohnston@db2
create user testuser identified ...
- 1,128
2
votes
1
answer
3k
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Creating Synonym For a Table in PostgreSQL over dblink?
I have two PostgreSQL databases connected over dblink extension. I want to create synonym for a table in first database so the queries that are coming through application I can route them to the table ...
- 524
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1
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566
views
Updating records in MS Access linked table will activate triggers?
I have a simple yet undocumented (or I could not find the documentation to solve my uneasiness) question, I hope I have come to the right place:
I am using MS Access to act as a poor front end for ...
- 191
1
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0
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460
views
Oracle DB link: Error line missing
We have a DB link between 2 Oracle 11.2 databases.
On the production system, we noticed that when an UPDATE statement of a remote table fails in an PL/SQL procedure (started as a scheduled job), the ...
- 215
2
votes
1
answer
2k
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Call dblink from a trigger function
I have an environment where I have to move data from one database to another once a day. I Try to solve this by calling 'dblink' from a triggered function.
The following statement I can execute from ...
- 123
1
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1
answer
67
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Accessing an external database through pgAdmin installed on my local machine?
I want to query a database stored in an external location. Up to now, I was using Microsoft Access for querying, but due to limitation of 2 GB output file, I am trying to switch to another DBMS, ...
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4
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2
answers
8k
views
Oracle 12c - Create materialized view results in ORA-00942
I have a view that I can access through a database link as such:
SQL> select count(*) from REMOTE_SCHEMA.REMOTE_VIEW@REMOTE_DB;
COUNT(*)
--------
110
I can create and successfully query the ...
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1
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3k
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alter public database link to private in oracle
I have a database link in my database which is created as public as below.
CREATE PUBLIC DATABASE LINK dblink_name CONNECT TO usernane USING 'tag';
I have a requirement to convert it to a PRIVATE ...
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1
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4k
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Is there an equivalent to OPENROWSET in Oracle?
Is there an equivalent to OPENROWSET in Oracle?
From OPENROWSET (Transact-SQL):
This method is an alternative to accessing tables in a linked server and is a one-time, ad hoc method of connecting and ...
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1
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7k
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What does remote database have to do for DB link in Oracle
In local database, it has to create DB LINK through CREATE DATABASE LINK.
What about remote database side, what does it have to do?
On fixed user link, local database need to know ID and password set....
- 329
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votes
3
answers
10k
views
Connecting Oracle 11g to Postgres via dblink
I have administrator access to our Oracle database , but was wondering if its possible to connect an Oracle 11g database to Postgres database and if so, what steps would I need to follow.
I've seen ...
- 131
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1
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744
views
Why can't I restore the DB from an SQL dump in PostgreSQL 9.4 (problem with dblink)?
I have created a dump of a DB using:
pg_dump db_name > db_dump.sql
and proceed to restore it with:
psql --single-transaction db_name < db_dump.sql
Prior to attempting to restore the DB, I ...
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