Unlike psql and other libpq based programs the JDBC driver does server certificate validation by default. This means that when establishing a SSL connection the JDBC driver will validate the server's identity preventing 'man in the middle' attacks. It does this by checking that the server certificate is signed by a trusted authority. If you have a certificate signed by a global certificate authority (CA), there is nothing further to do because Java comes with copies of the most common CA's certificates. If you are dealing with a self-signed certificate though, you need to make this available to the Java client to enable it to validate the server's certificate.
Postgresql Client Dbeaver
Note
Only the JDBC 3 driver supports SSL. The 1.4 JDK was the first version to come bundled with SSL support. Previous JDK versions that wanted to use SSL could make use of the additional JSSE library, but it does not support the full range of features utilized by the PostgreSQL™ JDBC driver.
About DBeaver DBeaver is a universal database management tool for everyone who needs to work with data in a professional way. With DBeaver you are able to manipulate with your data like in a regular spreadsheet, create analytical reports based on records from different data storages, export information in an appropriate format. DBeaver is certainly an ultimate Universal client which incorporates RDBMS and NoSQL Databases. The GUI is very useful and easy to manipulate all kind of DB queries.DBeaver is remarkably fast and stable. It loads quickly and responds instantaneously. Especially, It is the only client tool for Apache Cassandra NoSQL Database in market. DBeaver is a free, open source multiplatform database management tool and SQL client for developers and database administrators. DBeaver can be used to access any database or cloud application that has an ODBC or JDBC driver, such as Oracle, SQL Server, MySQl, Salesforce, or MailChimp.
To make the server certificate available to Java, the first step is to convert it to a form Java understands. From here the easiest thing to do is import this certificate into Java's system truststore. The default password for the cacerts keystore is changeit. The alias to postgesql is not important and you may select any name you desire.
Configuring the Client Unlike psql and other libpq based programs the JDBC driver does server certificate validation by default. This means that when establishing a SSL connection the JDBC driver will validate the server's identity preventing 'man in the middle' attacks. Please set the playback rate to 1.5x for better audio results.LIKE COMMENT SHARE SUBSCRIBE.FB.
If you do not have access to the system cacerts truststore you can create your own truststore. When starting your Java application you must specify this keystore and password to use. In the event of problems extra debugging information is available by adding -Djavax.net.debug=ssl to your command line.
To instruct the JDBC driver to try and establish a SSL connection you must add the connection URL parameter ssl=true.
In some situations it may not be possible to configure your Java environment to make the server certificate available, for example in an applet. For a large scale deployment it would be best to get a certificate signed by recognized certificate authority, but that is not always an option. The JDBC driver provides an option to establish a SSL connection without doing any validation, but please understand the risk involved before enabling this option.
A non-validating connection is established via a custom SSLSocketFactory class that is provided with the driver. Setting the connection URL parameter sslfactory=org.postgresql.ssl.NonValidatingFactory will turn off all SSL validation.
DBeaver Overview
DBeaver is a free, open source multiplatform database management tool and SQL client for developers and database administrators. DBeaver can be used to access any database or cloud application that has an ODBC or JDBC driver, such as Oracle, SQL Server, MySQl, Salesforce, or MailChimp. Devart DBeaver provides you with the most important features you'd need when working with a database in a GUI tool, such as:
- SQL queries execution
- Metadata browsing and editing
- SQL scripts management
- Data export/import
- Data backup
- DDL generation
- ER diagrams rendering
- Test data generation
- BLOB/CLOB support
- Database objects browsing
- Scrollable resultsets
The tool comes in two editions — Community and Enterprise. Enterprise Edition supports NoSQL databases, such as MongoDB or Cassandra, persistent query manager database, SSH tunneling, vector graphics (SVG) and a few other enterprise-level features. Note though that you can access a MongoDB database from DBeaver Community Edition using the respective Devart ODBC driver. For the purposes of this guide, we'll use the Community Edition of DBeaver to retrieve data from PostgreSQL via the Open Database Connectivity driver.
Creating an ODBC Data Source to Use PostgreSQL Data in DBeaver
- Click the Start menu and select Control Panel.
- Select Administrative Tools, then click ODBC Data Sources.
- Click on the System DSN tab if you want to set up a DSN name for all users of the system or select User DSN to configure DSN only for your account.
- Click the Add button and double-click Devart ODBC Driver for PostgreSQL in the list.
- Give a name to your data source and set up the connection parameters.
- Click the Test Connection button to verify that you have properly configured the DSN.
When using ODBC driver for PostgreSQL with DBeaver, SQL_WVARCHAR data types may be displayed incorrectly in DBeaver. To prevent this, you need to set the string data types to Ansi either in the Advanced Settings tab of the driver configuration dialog or directly in the connection string (String Types=Ansi) — all string types will be returned as SQL_CHAR, SQL_VARCHAR and SQL_LONGVARCHAR.
Connecting to PostgreSQL Data from DBeaver via ODBC Driver for PostgreSQL
Follow the steps below to establish a connection to PostgreSQL in DBeaver.
- In the Database menu, select New Database Connection.
- In the Connect to database wizard, select ODBC and click Next.
- Enter the previously configured DSN in the Database/Schema field.
- Click Test Connection. If everything goes well, you'll see the Success message.
Viewing PostgreSQL Database Objects and Querying Data
You can expand out the database structure in DBeaver's Database Navigator to visualize all the tables in PostgreSQL database. To view and edit the data in a table, you need to right-click on the target table name and select View data.The content of the table will be displayed in the main workspace.
Postgresql Client Windows Dbeaver
If you want to write a custom SQL query that will include only the necessary columns from the table, you can select New SQL Editor in the SQL Editor main menu. Create your query and run it by clicking Execute SQL Statement to view the results in the same window.
Dbeaver Postgresql Client Portal
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