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PostgreSQL Database Link to Oracle Database on Linux

I have seen question, like "How to make Database Link from PostgreSQL to Oracle?", always floats in PostgreSQL Community Forum. So, I thought to do some research on it and write a Blog. Cybertec (One of The PostgreSQL Database Company) has released a PostgreSQL Module ODBC Link, using which user can make Database link to any other database, including Oracle, MS SQL Server, PostgreSQL etc, which have ODBC compliant Data source. Lets see how you can make ODBC Connection from PostgreSQL to any ODBC compliant data source and fetch data. Installation of this module is very simple. Following are the steps which user can follow: 1. Install the unixODBC driver on your linux machine. user can use following useful link for Downloading and Installing the unixODBC Driver: http://www.unixodbc.org/ 2. Download ODBC-Link from following location: http://www.cybertec.at/download/odbc_link/ODBC-Link-1.0.4.tar.gz 3. Untar the downloaded file as given below: tar -zxvf ODBC-Link-1.0.4....
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Remote Log Reading in PostgreSQL 8.4 and 9.0.

I was going through the one of the important feature (SQL/MED) which is coming feature of PostgreSQL 9.1. This feature enables user to access any external file, using SQL, from PostgreSQL Terminal. Magnus hagander's has also blogged about this feature and he has shown "How to access the PostgreSQL logfile using SQL/Med" . After going through his blog, I thought to do same with PostgreSQL 8.4/9.0 using plperl program. Following are the steps, which can be use to access the postgreSQL csv log file: 1. Change the log_destination parameter in postgresql.conf file of PG Instance Directory, to create csvlog of postgreSQL log. As given below. log_destination = 'stderr,csvlog' 2. Reload the changes in PostgreSQL, using following command: postgres=# select pg_reload_conf(); pg_reload_conf ---------------- t (1 row) 3. Connect to PostgreSQL database using psql command and Create following data type CREATE type pg_log_type as ( log_time timestamp(3) with ti...
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New Features in Slony 2.1

Slony 2.1 has been released on 19th Oct. 2011. So, I thought to look at some important improvement done in this new release, which can make users life easier. Before discussing about the changes, lets setup slony replication. Following Codes can be use for setting up slony replication. #### Preable Scripts: cluster name=slonytest; NODE 1 ADMIN CONNINFO = 'dbname=postgres host=localhost user=postgres port=5432 password=postgres'; NODE 2 ADMIN CONNINFO = 'dbname=repdb host=localhost user=postgres port=5432 password=postgres'; Adding Node script: ### create_nodes.slonik include ; init cluster (id=1, comment='slonytest node 1'); store node (id=2, comment='slonytest subscriber node 2', event node=1); Storing Path: ### store_paths.slonik include ; STORE PATH (SERVER=1, CLIENT=2, CONNINFO='dbname=postgres host=localhost user=postgres port=5432 password=Empid#042'); STORE PATH (SERVER=2, CLIENT=1, CONNINFO='dbname=repdb host=localhost us...
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