Drop Down MenusCSS Drop Down MenuPure CSS Dropdown Menu

Drop A Template Database From PostgreSQL

- 
postgres=# DROP DATABASE tempdb;
ERROR:  cannot drop a template database
METHOD 1:

  • if we want to drop any database means you need to set datistemplate=false
  • if you want to connect to template0 you need to set dataallowcomm=true

temp0=# UPDATE pg_database SET datistemplate='false' WHERE datname='temp0';
UPDATE 1
--Becouse you cannot drop from connected database temp0 if you want to drop the database you need to connect as another database and drop the temp0 database 
temp0=# DROP DATABASE temp0;                                               
ERROR:  cannot drop the currently open database

postgres=# DROP DATABASE tempdb;
DROP DATABASE
METHOD 2:
postgres=# create database temp11 is_template true;
CREATE DATABASE
postgres=# drop database tempdb;
ERROR:  cannot drop a template database
postgres=# alter database tempdb is_template false;
ALTER DATABASE
postgres=# drop database tempdb;
DROP DATABASE

Comments

Post a Comment

Popular posts from this blog

How to Get Table Size, Database Size, Indexes Size, schema Size, Tablespace Size, column Size in PostgreSQL Database

-
In this post, I am sharing few important function for finding the size of database, table and index in PostgreSQL. Finding object size in postgresql database is very important and common. Is it very useful to know the exact size occupied by the object at the tablespace. The object size in the following scripts is in GB. The scripts have been formatted to work very easily with PUTTY SQL Editor. 1. Checking table size excluding table dependency: SELECT pg_size_pretty(pg_relation_size('mhrordhu_shk.mut_kharedi_audit')); pg_size_pretty ---------------- 238 MB (1 row) 2. Checking table size including table dependency: SELECT pg_size_pretty(pg_total_relation_size('mhrordhu_shk.mut_kharedi_audit')); pg_size_pretty ---------------- 268 MB (1 row) 3. Finding individual postgresql database size SELECT pg_size_pretty(pg_database_size('db_name')); 4. Finding individual table size for postgresql database -including dependency index: SELECT pg_size_pretty(pg_total_rel
Read more

PostgreSQL Pgbadger Installation On Linux

-
Image
PgBadger is a tool that analyzes PostgreSQL log files and generates reports on execution of SQL and server operation. Statistical reports analyzed from a number of perspectives can be useful not only for grasping the usual database operation but also as a hint for performance improvement. The report output by pgBadger has the following features. Graph output in HTML format Many statistical objects Daily, Weekly unit creation possible 1.Graph output in HTML format Many of the analysis results can be displayed in graph form by outputting the report in HTML format (output in text format or JSON format is also possible). By analyzing the log information graphed, it is much more prospective for people to see than the raw log data. So, if you do not need to handle it with another tool separately, we recommend report output in HTML format. 2.Many statistical objects A lot of data useful for database performance analysis is output in the report as shown below. Qu
Read more

PostgreSQL Database startup / shutdown /restart

-
Pg_ctl Utility & Postgresql Service to do the same thing: Start the postgres server in the background. Without PGDATA set, “pg_ctl start” needs needs the additional  -D /datadir   argument in order to start. you can start/stop the postgresql server as root user as well as postgres user root user: “ service postgresql start “ “ /etc/init.d/postgresql  start “, or “ systemctl start postgresql-10 ” – this is for redhat linux above version 6 postgres or edb user: Pg_ctl is only applicable for postgres user or edb user if you are a Enterprisedb su – postgres ./ pg_ctl start  -D /opt/PostgreSQL/9.3/data By using following anyone methods you can start,stop,reload else restart the postgresql server By using Pg_ctl Utility Postgresl -9.3 Script By using Postgresql Service 1. pg_ctl utility – as postgres user: using pg_ctl you can start/stop/reload/restart the postgresql server this utility can only permitted to access as postgres user ./pg_ctl stop -D /opt/Postg
Read more

7 Steps to configure BDR replication in postgresql

-
Image
 The  BDR  (Bi-Directional Replication) project adds multi-master replication to PostgreSQL 9.4.  Postgres-BDR has a lower impact on the masters(s) than trigger-based replication solutions. There is no write-amplification, as it does not require triggers to write to queue tables in order to replicate writes.   Here We are using  postgres version 9.4.12 and bdr version 1.0.2. for configuring  multi master replication . Simply Following 7 steps you can configure the multi master replication in postgresql. To download the bdr in below link. .   https://github.com/2ndQuadrant/bdr/archive/bdr-pg/REL9_4_12-1.tar.gz $ tar -xzvf REL9_4_12-1.tar.gz $ wget https://github.com/2ndQuadrant/bdr/archive/bdr-plugin/1.0.2.tar.gz $ tar -xzvf 1.0.2.tar.gz 1. To install BDR. $ cd ~/bdr-bdr-pg-REL9_4_12-1 $ ./configure --prefix=/usr/lib/postgresql/9.4 --enable-debug --with-openssl $ make -j4 -s install-world $ cd ~/bdr-bdr-plugin-1.0.2 $ PATH=/usr/lib/postgresql/9.4/bin:"$PATH" ./c
Read more

Top 20 Highest Paying URL Shortener Companies - Best URL Shorteners To Earn Fast

-
Image
Earn Money On Short URLs is one the amazing and easiest method of all time. No doubt their are hundreds of different ways to earn money from living room but each and every task require little technical effort and investment. But from all them Earn money from URL shortener is easy and free to use.   If you does not have any technical or development skills and even marketing word scares you then its better option for you to go with url shortening to earn some decent money. Now the question what the URL short means and how this mechanism really works.? Lets start which basic understanding about URL shorteners, as its name describes shorten down the long URL. Basically URL shorteners are used to make long ugly urls into small, easy to remember.   Commonly we all use bitly and any other service to accomplish this task. But they are only used for shorting perform but on the other hand there are few services who provide as way to monetize from that short links. T hose services setup 5
Read more