In case someone is running the pgadmin-4 in docker, and not able to connect to postgres container, like me. The solution is to first find the ip at which the docker image is running. Step-1, make sure the postgres container is running. Step-2 write command- PS C:\docker> docker ps Should result as below or similar, … Read more
Django’s cursor class is just a wrapper around the underlying DB’s cursor, so the effect of leaving the cursor open is basically tied to the underlying DB driver. According to psycopg2’s (psycopg2 is DB driver Django uses for PostgreSQL DB’s) FAQ, their cursors are lightweight, but will cache the data being returned from queries you … Read more
You should not leave connections open. You should: Open connections as late as possible Close connections as soon as possible The connection itself is returned to the connection pool. Connections are a limited and relatively expensive resource. Any new connection you establish that has exactly the same connection string will be able to reuse the … Read more
From the psql documentation: psql is built as a “console application”. Since the Windows console windows use a different encoding than the rest of the system, you must take special care when using 8-bit characters within psql. If psql detects a problematic console code page, it will warn you at startup. To change the console … Read more
Sql Server fire this error when your application don’t have enough rights to access the database. there are several reason about this error . To fix this error you should follow the following instruction. Try to connect sql server from your server using management studio . if you use windows authentication to connect sql server … Read more
Whilst connected to the database you want to get this information SELECT rolname, rolconnlimit FROM pg_roles WHERE rolconnlimit <> -1; More details are available at http://www.postgresql.org/docs/current/static/view-pg-roles.html
Edit: The problem is that you used Short variable declaration := and you just stored the created *DB value in a local variable and not in the global one. This line: db, err := NewDB(dbinfo) Creates 2 local variables: db and err, and this local db has nothing to do with your global db variable. … Read more
The following method has proven useful for me. It’s super quick and practical and doesn’t require PowerShell: Open up Notepad and create an empty text file, then click File -> click Save -> and save it with the File name: TestConnection.udl to your desktop. Go to your desktop and double-click on the TestConnection.udl file you … Read more
Referencing the connection string should be done as such: MySQLHelper.ExecuteNonQuery( ConfigurationManager.ConnectionStrings[“MyDB”].ConnectionString, CommandType.Text, sqlQuery, sqlParams); ConfigurationManager.AppSettings[“ConnectionString”] would be looking in the AppSettings for something named ConnectionString, which it would not find. This is why your error message indicated the “ConnectionString” property has not been initialized, because it is looking for an initialized property of AppSettings named … Read more
You could use this as a rough “ruleset”: YES, use persistent connections, if: There are only few applications/users accessing the database, i.e. you will not result in 200 open (but probably idle) connections, because there are 200 different users shared on the same host. The database is running on another server that you are accessing … Read more