PostgreSQL JDBC forLinux
This tutorial shows how to set up a data source and connect to a PostgreSQL database using the Database Explorer app or the command line. The tutorial uses the JDBC4 PostgreSQL Driver, Version 8.4 to connect to a PostgreSQL 9.2 database.
Step 1. Verify the driver installation.
If the JDBC driver for PostgreSQL is not installed on your computer, find the link on theDriver Installationpage to install the driver. Follow the instructions to download and install this driver on your computer.
Step 2. Set up the data source.
You set up a data source using the Database Explorer app or the command line.
Set Up Data Source Using Database Explorer App
Open the Database Explorer app by clicking theAppstab on the MATLAB®Toolstrip. Then, on the right of theAppssection, click theShow more画廊箭头打开应用程序. UnderDatabase Connectivity and Reporting, clickDatabase Explorer. Alternatively, enter
databaseExplorer
at the command line.In theData Sourcesection, selectConfigure Data Source>Configure JDBC data source.
The JDBC Data Source Configuration dialog box opens.
In theName框中,输入一个名称为您的数据源。(这次考试ple uses a data source named
PostgreSQL
.) You use this name to establish a connection to your database.From theVendorlist, select
PostgreSQL
.In theDriver Locationbox, enter the full path to the JDBC driver file.
In theDatabasebox, enter the name of your database. In the服务器box, enter the name of your database server. Consult your database administrator for the name of your database server. In thePort Numberbox, enter the port number.
UnderConnection Options, in theNamecolumn, enter the name of an additional driver-specific option. Then, in theValuecolumn, enter the value of the driver-specific option. Click the plus sign+to specify additional driver-specific options.
ClickTest. The Test Connection dialog box opens. Enter the user name and password for your database, or leave these boxes blank if your database does not require them. ClickTest.
If your connection succeeds, the Database Explorer dialog box displays a message indicating the connection is successful. Otherwise, it displays an error message.
ClickSave. The JDBC Data Source Configuration dialog box displays a message indicating the data source is saved successfully. Close this dialog box.
Set Up Data Source Using Command Line
Create a JDBC data source for a PostgreSQL database.
vendor ="PostgreSQL"; opts = databaseConnectionOptions("jdbc",vendor);
Set the JDBC connection options. For example, this code assumes that you are connecting to a JDBC data source named
PostgreSQL
, full path of the JDBC driver file/home/user/DB_Drivers/postgresql-8.4-702.jdbc4.jar
, database nametoystore_doc
, database serverdbtb00
, and port number5432
.opts = setoptions(opts,...'DataSourceName',"PostgreSQL",...'JDBCDriverLocation',"/home/user/DB_Drivers/postgresql-8.4-702.jdbc4.jar",...'DatabaseName',"toystore_doc",'Server',"dbtb00",...'PortNumber',5432);
Test the database connection by specifying the user name
username
and passwordpwd
, or leave these arguments blank if your database does not require them.username ="username"; password ="pwd"; status = testConnection(opts,username,password);
Save the JDBC data source.
saveAsDataSource(opts)
After you complete the data source setup, connect to the PostgreSQL database using the Database Explorer app or the JDBC driver and command line.
Step 3. Connect using the Database Explorer app or the command line.
Connect to PostgreSQL Using Database Explorer App
On theDatabase Explorertab, in theConnectionssection, clickConnectand select the data source for the connection.
In the connection dialog box, enter a user name and password, or leave these boxes blank if your database does not require them. ClickConnect.
The Catalog and Schema dialog box opens.
Select the catalog and schema from theCatalogandSchemalists. ClickOK.
The app connects to the database and displays its tables in theData Browserpane. A data source tab appears to the right of the pane. The title of the data source tab is the data source name that you defined during the setup. The data source tab contains emptySQL QueryandData Previewpanes.
Select tables in theData Browserpane to query the database.
Close the data source tab to close the SQL query. In theConnectionssection, close the database connection by clickingClose Connection.
Note
If multiple connections are open, close the database connection of your choice by selecting the corresponding data source from theClose Connectionlist.
Connect to PostgreSQL Using JDBC Driver and Command Line
Connect to a PostgreSQL database using the configured JDBC data source, user name
username
, and passwordpwd
.datasource ="PostgreSQL"; username ="username"; password ="pwd"; conn = database(datasource,username,password);
Close the database connection.
close(conn)