Database Technologies

Today, I though to mention some of Oracle workarounds which can be use for Migration of Oracle Database to PPAS 9.0(EnterpriseDB). 1. UTL_RAW.CAST_TO_RAW This is a Oracle Packaged Function, which can be use to convert VARCHAR2 value into RAW Value. Lets see its example in Oracle: SQL> select utl_raw.cast_to_raw('TESTING TESTING') from dual; UTL_RAW.CAST_TO_RAW('TESTINGTESTING') -------------------------------------------------------------------------------- 54455354494E472054455354494E47 Since PPAS 9.0, doesn't have this package in 9.0, therefore user can use postgresql function decode() for converting of varchar datatype to RAW/bytea data. Following is an example: edb=# select decode('TESTING TESTING','escape') from dual; decode ---------------------------------- \x54455354494e472054455354494e47 (1 row) which is a same output. 2. UTL_RAW.CAST_TO_VARCHAR2 Using this packaged function user can conver

This has been asked many times, so I thought to write steps for enabling ssl: Following are steps, which can be use to enable ssl in postgreSQL: 1. Generate a passphrase protected certificate using following command: openssl req -new -text -out cert.req Snapshot is given below: Generating a 1024 bit RSA private key ....................++++++ ...................................................++++++ writing new private key to 'privkey.pem' Enter PEM pass phrase: Verifying - Enter PEM pass phrase: ----- You are about to be asked to enter information that will be incorporated into your certificate request. What you are about to enter is what is called a Distinguished Name or a DN. There are quite a few fields but you can leave some blank For some fields there will be a default value, If you enter '.', the field will be left blank. ----- Country Name (2 letter code) [AU]: State or Province Name (full name) [Some-State]: Locality Name (eg, city) []: Organization Name

One of my Colleague had asked how he can use Nagios for PostgreSQL Monitoring. So, I thought of writing steps to show the blog readers about nagios Configuration for PostgreSQL/PPAS. Following are the steps: 1. Download Nagios Core wget http://nagios.sourceforge.net/download/cvs/nagios-HEAD.tar.gz 2. For Installing Nagios, following packages would be required,so make sure you have them installed on your server. gcc make binutils cpp libpq-dev libmysqlclient15-dev libssl0.9.8 libssl-dev pkg-config apache2 libgd2-xpm libgd2-xpm-dev libgd-tools libpng12-dev libjpeg62-dev perl libperl-dev libperl5.8 libnet-snmp-perl 3. Create nagios user and group as given below: [root@localhost]# useradd nagios [root@localhost]# passwd nagios [root@localhost]# groupadd nagcmd [root@localhost]# usermod -G nagcmd nagios [root@localhost]# usermod -G nagcmd apache 4. Now, untar Nagios Core/Nagios Plugin using following command: tar -xvf nagios-HEAD.tar.gz 5. Now configure Nagios