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I created new database called "shashi" in PgAdmin III. In QGIS to create new connection I entered following details.

In PostgreSQL 9.5 pgAdmin lll Please enter password for user postgres on server PostgreSQL 9.5: ****

In QGIS Create a New PostGIS Connection Name: shashidhar Service: Host: localhost Port: 5432 Database: postgres SSL mode: disable

Authentication Username: postgres Password: **** (same password that I used in pgAdmin lll to connect to the server )

Test connection ERROR: Connection failed-consult message log for details

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  • I am completely new to databases.
    – Shashi
    May 2, 2016 at 0:26

2 Answers 2

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It looks like you have confused the username and the database name.

If you created a database called shashi, you should have Database: shashi in the QGIS PostGIS Connection window. Your username is likely postgres.

If that doesn't work, look in the message log. My logs are in /usr/local/pgsql/var/, but they may be somewhere else on your machine.

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  • Also...If your PG database & QGIS installed in different PC then you have to grant your IP (QGIS PC IP) @ POSTGIS pg.hba conf file to get full DB access... May 2, 2016 at 6:02
  • Yes, I tried with Database: Shashi in the QGIS PostGIS connection window and username: postgres, Still unable to connect to the database.
    – Shashi
    May 8, 2016 at 19:30
  • Can you post your message log? Also try the CREATE EXTENSION POSTGIS as lejedi76 suggests.
    – amball
    May 14, 2016 at 2:46
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You can not connect to your database in Qgis if your dB is not spatial. Please run CREATE EXTENSION POSTGIS; on your db in pgadminIII and Retry to connect

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  • Can you Please give steps of where to write that query "CREAT EXTENSION POSTGIS;
    – Shashi
    May 8, 2016 at 19:31
  • Do you have pgadmin3 installed? Simply open a query and execute CREATE EXTENSION postgis;. Have a look at this tutorial if you've never used pgadmin: youtube.com/watch?v=YHXLNtiCI1U
    – amball
    May 14, 2016 at 2:44

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