I would like to develop a ER diagram using DBeaver (Eclipse plugin) for a database that doesn't yet exist. Also, the database server doesn't exist.
Can DBeaver be used to develop a ER diagram without connecting to an existing database server? I can only find documentation for working with an existing database or connecting to an existing database server.
Nope, sorry.
DBeaver tools are always associated with the current connection.
For example, in the ERD when adding tables, DBeaver often sends requests to the database of foreign keys.
You can use standard sample SQLite database in DBeaver for experiments.
I have got a sql file where is configured a database in PostgreSQL technology. I created a database from sql file but from code it is hard to understand action/connecting between the tables. Is it some tool which show all the connections between tables for PostgreSQL?
pgDesigner
Data Architect
Datastudio
DbDesigner fork
DbSchema
dbwrench
DeZign for Database
Please take a look to this list of tools.
I have the following code to generate the schema for a database in Nhibernate
new SchemaExport(configuration).Execute(true, true, false);
but when run against a PostgreSQL database, I end up getting the following error
[NpgsqlException (0x80004005): FATAL: 3D000: database "dbname" does not exist]
If I however create the database manually, the schema is exported without errors. An so the question: Why is Nhibernate SchemaExport unable to create a PostgreSQL database and yet this works against other databases like SQLite, MsSqlCe and MsSql Server.
I have searched for online literature but have been unable to locate any highlighting on this issue.
I am using Nhibernate 3.3.1 with PostgreSQL 9.2.
You must create the database before you can create the tables and other objects within the database.
Do this with a CREATE DATABASE statement on a PostgreSQL connection - either in your app, or via psql or PgAdmin-III.
PostgreSQL doesn't support creating databases on demand / first access. Perhaps that's what your tool is expecting?
If you think the DB does exist and you can see it in other tools, maybe you're not connecting to the same database server? Check the server address and port.
I am beginner to PostgreSQL.
I want to connect to another database from the query editor of Postgres - like the USE command of MySQL or MS SQL Server.
I found \c databasename by searching the Internet, but its runs only on psql. When I try it from the PostgreSQL query editor I get a syntax error.
I have to change the database by pgscripting. Does anyone know how to do it?
When you get a connection to PostgreSQL it is always to a particular database. To access a different database, you must get a new connection.
Using \c in psql closes the old connection and acquires a new one, using the specified database and/or credentials. You get a whole new back-end process and everything.
You must specify the database to use on connect; if you want to use psql for your script, you can use "\c name_database"
user_name=# CREATE DATABASE testdatabase;
user_name=# \c testdatabase
At this point you might see the following output
You are now connected to database "testdatabase" as user "user_name".
testdatabase=#
Notice how the prompt changes. Cheers, have just been hustling looking for this too, too little information on postgreSQL compared to MySQL and the rest in my view.
In pgAdmin you can also use
SET search_path TO your_db_name;
The basic problem while migrating from MySQL I faced was, I thought of the term database to be same in PostgreSQL also, but it is not. So if we are going to switch the database from our application or pgAdmin, the result would not be as expected.
As in my case, we have separate schemas (Considering PostgreSQL terminology here.) for each customer and separate admin schema. So in application, I have to switch between schemas.
For this, we can use the SET search_path command. This does switch the current schema to the specified schema name for the current session.
example:
SET search_path = different_schema_name;
This changes the current_schema to the specified schema for the session. To change it permanently, we have to make changes in postgresql.conf file.
Use this commad when first connect to psql
=# psql <databaseName> <usernamePostgresql>
set search_path = 'schema name here'
while connecting to the postgres, you have to opt for default database to connect. If you have nothing, you can use 'postgres' as default.
You can use dbeaver to connect to postgres. UI is good
PgAdmin 4, GUI Tool: Switching between databases
In the PgAdmin Browser on the left hand side, right click on the database you are willing to switch to.
Select a QueryTool from the drop down menu (or any other option that you need, I will stick with the QueryTool for now).
You will see the QueryTool in the PgAdmin window, and on top you will see the active database and the role name.
Now you can write queries against the chosen database.
You can open multiple QueryTools for multiple database, and work with them as you do with your graphical text editor.
In order to be sure that you are querying the proper database, issue the following query:
SELECT session_user, current_database();
I'm trying to connect to a PostgreSQL 9.1 database using Oracle SQL Developer 3.0.04, but I'm not having any success so far.
First, if I add a third party driver on preferences, when adding a new connection there's no tab for PostgreSQL (it works fine for MySQL though). I'm using a JDBC4 version 9.1 driver, but I tried a JDBC3 of the same version and still get the same thing.
Second, there's nothing like manual configuration tab when adding a new connection. The closest is the Advanced option on Oracle tab, where I can provide a custom URL, but it fails because complains about the selected Driver (of course).
Finally, I got connected importing a connection from an XML file (contents below), but it displays only my schemas and doesn't show my tables inside them.
So, my question is: does Orable SQL Developer support PostgreSQL connections? Is there any other way to have my tables being displayed in the ObjectViewer?
<?xml version = '1.0' encoding = 'UTF-8'?>
<References xmlns="http://xmlns.oracle.com/adf/jndi">
<Reference name="Lumea" className="oracle.jdeveloper.db.adapter.DatabaseProvider" credentialStoreKey="Lumea" xmlns="">
<Factory className="oracle.jdeveloper.db.adapter.DatabaseProviderFactory"/>
<RefAddresses>
<StringRefAddr addrType="user">
<Contents>lumea</Contents>
</StringRefAddr>
<StringRefAddr addrType="subtype">
<Contents>thirdParty</Contents>
</StringRefAddr>
<StringRefAddr addrType="customUrl">
<Contents>jdbc:postgresql://localhost:5432/versates</Contents>
</StringRefAddr>
<StringRefAddr addrType="SavePassword">
<Contents>true</Contents>
</StringRefAddr>
<StringRefAddr addrType="password">
<Contents>myencryptedpass</Contents>
</StringRefAddr>
<StringRefAddr addrType="driver">
<Contents>org.postgresql.Driver</Contents>
</StringRefAddr>
<StringRefAddr addrType="DeployPassword">
<Contents>true</Contents>
</StringRefAddr>
</RefAddresses>
</Reference>
</References>
Oracle SQL Developer 4.0.1.14 surely does support connections to PostgreSQL.
download JDBC driver for Postgres (http://jdbc.postgresql.org/download.html)
in SQL Developer go to Tools → Preferences, Database → Third Party JDBC Drivers and add the jar file (see http://www.oracle.com/technetwork/products/migration/jdbc-migration-1923524.html for step by step example)
now just make a new Database Connection and instead of Oracle, select PostgreSQL tab
Edit:
If you have different user name and database name, one should specify in hostname: hostname/database? (do not forget ?) or hostname:port/database?.
(thanks to #kinkajou and #Kloe2378231; more details on https://stackoverflow.com/a/28671213/565525).
I've just downloaded SQL Developer 4.0 for OS X (10.9), it just got out of beta. I also downloaded the latest Postgres JDBC jar. On a lark I decided to install it (same method as other third party db drivers in SQL Dev), and it accepted it. Whenever I click "new connection", there is a tab now for Postgres... and clicking it shows a panel that asks for the database connection details.
The answer to this question has changed, whether or not it is supported, it seems to work. There is a "choose database" button, that if clicked, gives you a dropdown list filled with available postgres databases. You create the connection, open it, and it lists the schemas in that database. Most postgres commands seem to work, though no psql commands (\list, etc).
Those who need a single tool to connect to multiple database engines can now use SQL Developer.
Oracle SQL Developer doesn't support connections to PostgreSQL. Use pgAdmin to connect to PostgreSQL instead, you can get it from the following URL
http://www.pgadmin.org/download/windows.php
I managed to connect to postgres with SQL Developer.
I downloaded postgres jdbc driver and saved it in a folder.
I run SQL Developer -> Tools -> Preferences -> Search -> JDBC
I defined postgres jdbc driver for the Database and Data Modeler (optional).
This is the trick.
When creating new connection define Hostname like localhost/crm? where crm is the database name. Test the connection, works fine.
If there is no database with the same name as the username, then clicking "Choose Database" will fail with an error like "Status : Failure -FATAL: database "your_username" does not exist"
To work around this, put 5432/database_name? in the Port field, where 5432 is the port of your Postgres instance and database_name is the name of at an existing database that your_username has access to. Then click "Choose Database" again and it should work. Now you can choose the database you want and remove the extra /database_name? from the Port field.
I think this question needs an updated answer, because both PostgreSQL and SQLDeveloper have been updated several times since it was originally asked.
I've got a PostgreSQL instance running in Azure, with SSLMODE=Require.
While I've been using DBeaverCE to access that instance and generate an ER Diagram, I've gotten really familiar with SQLDeveloper, which is now at v19.4.
The instructions about downloading the latest PostgreSQL JDBC driver and where to place it are correct. What has changed, though, is where to configure your DB access.
You'll find a file $HOME/.sqldeveloper/system19.4.0.354.1759/o.jdeveloper.db.connection.19.3.0.354.1759/connections.json:
{
"connections": [
{
"name": "connection-name-goes-here",
"type": "jdbc",
"info": {
"customUrl": "jdbc:postgresql://your-postgresql-host:5432/DBNAME?sslmode=require",
"hostname": "your-postgresql-host",
"driver": "org.postgresql.Driver",
"subtype": "SDPostgreSQL",
"port": "5432",
"SavePassword": "false",
"RaptorConnectionType": "SDPostgreSQL",
"user": "your_admin_user",
"sslmode": "require"
}
}
]
}
You can use this connection with both Data Modeller and the admin functionality of SQLDeveloper. Specifying all the port, dbname and sslmode in the customUrl are required because SQLDeveloper isn't including the sslmode in what it sends via JDBC, so you have to construct it by hand.
I got the list of databases to populate by putting my username in the Username field (no password) and clicking "Choose Database". Doesn't work with a blank Username field, I can only connect to my user database that way.
(This was with SQL Developer 4.0.0.13, Postgres.app 9.3.0.0, and postgresql-9.3-1100.jdbc41.jar, FWIW.)
Oracle SQL Developer 2020-02 support PostgreSQL, but it is just the basics by adding postgreSQL driver under jdbc dir and configure by adding as a 3rd party driver.
The supported functionality:
multiple databases which can be selected at connection definition
CRUD operations like query tables
scheme operations
basic modelling support: show tables without pk, fk, connections
Not supported functionalities:
no table or field completion
no indexes are shown in a tab
no constraints are shown in a tab like: fk, pk-s, unique, or others
no table or field completions in the editor
no functions, packages,triggers, views are shown
The sad thing is Oracle should only change the queries behind this view in case of PostgreSql connections. For example for indexes they need to use this query: select * from pg_catalog.pg_indexes;
Except that it will not work if your user name and database name are differents. It sounds like an SQLDeveloper bug and i can't find any workaroud
Maybe there are some bugs in Oracle SQL Developer when it connect to the postgresql.However I connect postgresql with navicat successfully.(My postgresql username and database name are different
host= localhost/postgres? worked for me if you need a schema/database use:
localhost/postgres?currentSchema=myschema
ex: localhost/postgres?currentSchema=public
once connected, you can also use the
[Choose Database] button and pull down
sql developer postgres jdbc url for the rest of us