We are proud to share our inclusion in the 2024 Gartner Magic Quadrant for Data Integration Tools. We believe this recognition reflects the differentiated business outcomes CData delivers to our customers.
Get the Report →Easily Integrate AlloyDB Data in Lazarus Pascal IDE
Learn how to easily integrate live AlloyDB data in Lazarus Pascal IDE using the CData ODBC Driver for real-time insights.
Lazarus Pascal IDE is a powerful, free, open-source development environment for building cross-platform applications. With the CData ODBC Driver for AlloyDB, you can seamlessly integrate and query live AlloyDB data, bringing real-time insights within your Lazarus Pascal IDE applications to enhance reporting, dashboards, and workflows.
This guide provides a comprehensive walkthrough, from setting up the connection to leveraging live AlloyDB in Lazarus Pascal IDE. Whether you're building reports, dashboards, or complex workflows, you'll gain the tools to unlock real-time insights and functionality within your applications.
Overview
Here is an overview of the steps:
- Configure the DSN for AlloyDB data in the CData ODBC Driver for AlloyDB with the necessary connection properties.
- Set up the ODBC connection in Lazarus by configuring the TSQLConnector, TSQLQuery, TDataSource, and TDBGrid components with the required details.
- Test the connection to AlloyDB data by writing sample code on the Main form.
- Compile and run the application to verify the successful integration and display of live AlloyDB data.
Prerequisites
Before starting, ensure you have the following:
- Lazarus IDE (version 3.4 recommended). Download from here.
- CData ODBC Driver for AlloyDB. Download and try the latest version from here.
Configure the AlloyDB DSN Using the CData ODBC Driver
To start, configure the DSN (Data Source Name) for AlloyDB data in your system using the CData ODBC Driver for AlloyDB. Download and install a 30-day free trial with all the features from here.
Once installed, launch the ODBC Data Source Administrator:
- On Windows: Search for ODBC Data Source Administrator in the Start menu and open the application.
- On Mac: Open Applications, go to Utilities, and select ODBC Manager.
- On Linux: Use the command line to launch ODBC Data Source Administrator or use unixODBC if installed.

Once launched, double-click on the CData AlloyDB data Source and enter the required values to establish a connection:
The following connection properties are usually required in order to connect to AlloyDB.
- Server: The host name or IP of the server hosting the AlloyDB database.
- User: The user which will be used to authenticate with the AlloyDB server.
- Password: The password which will be used to authenticate with the AlloyDB server.
You can also optionally set the following:
- Database: The database to connect to when connecting to the AlloyDB Server. If this is not set, the user's default database will be used.
- Port: The port of the server hosting the AlloyDB database. This property is set to 5432 by default.
Authenticating with Standard Authentication
Standard authentication (using the user/password combination supplied earlier) is the default form of authentication.
No further action is required to leverage Standard Authentication to connect.
Authenticating with pg_hba.conf Auth Schemes
There are additional methods of authentication available which must be enabled in the pg_hba.conf file on the AlloyDB server.
Find instructions about authentication setup on the AlloyDB Server here.
Authenticating with MD5 Authentication
This authentication method must be enabled by setting the auth-method in the pg_hba.conf file to md5.
Authenticating with SASL Authentication
This authentication method must be enabled by setting the auth-method in the pg_hba.conf file to scram-sha-256.
Authenticating with Kerberos
The authentication with Kerberos is initiated by AlloyDB Server when the ∏ is trying to connect to it. You should set up Kerberos on the AlloyDB Server to activate this authentication method. Once you have Kerberos authentication set up on the AlloyDB Server, see the Kerberos section of the help documentation for details on how to authenticate with Kerberos.
Create a New GUI Project
- Launch the Lazarus IDE.
- Navigate to File > New > Application to create a new GUI project with a Main form.

Add Required Connection Components to the Form
- Go to View > Component > Palette and check the Keep open at the bottom-left to keep the Components window persistently open.
-
Search for the following components and add them to the Main form Form1 by clicking on Use at the bottom right.
- TSQLConnector
- TSQLTransaction
- TSQLQuery
- TDataSource
- TDBGrid



Configure the TSQLConnector Component
The TSQLConnector component in Lazarus Pascal IDE facilitates connections between your application and various databases or database APIs. Here's how to configure it:
- Select the TSQLConnector component on the Main form.
- Open the Object Inspector if it's not already open by going to View > Object Inspector
- In the Object Inspector on the left, set the following properties under the Properties section:
Property Value Connected True Driver ODBC DatabaseName Your DSN name (e.g., CData AlloyDB Source) UserName Your database username Password Your database password HostName AlloyDB URL or localhost for local databases LoginPrompt False Transaction Select your TSQLTransaction component
If your credentials require a security token, follow these steps:
- Double-click the Main Form in the Lazarus Pascal IDE to open the code editor.
- Locate the procedure TForm1.FormCreate(Sender: TObject); section.
- Paste the following code below the begin keyword. Replace 'your_security_token' with your actual security token:
SQLConnector1.Params.Values ['Password'] := SQLConnector1.Params.Values ['Password'] + 'your_security_token';



Configure the TSQLQuery Component
The TSQLQuery component in Lazarus Pascal IDE receives SQL code for queries and retrieves data from a database, simplifying data manipulation. Configure using the following info:
- Select the TSQLQuery component in the Main form.
- Set the following properties in the Object Inspector under the Properties section:
Property Value Active True DataBase Select the name of your TSQLConnector component SQL (Click 3 dots) Your query (e.g., SELECT * FROM Orders) Transaction Your TSQLTransaction component



Configure the TDataSource, TDBGrid, TSQLTransaction Components
The TDataSource component in Lazarus Pascal IDE bridges a dataset (e.g., TSQLQuery) with data-aware controls like TDBGrid, allowing data to be displayed and manipulated. The TDBGrid presents the data in a tabular format, while the TSQLTransaction ensures database operations maintain data integrity by executing within a transaction. Here's how to configure all three components:
- Select the TDataSource component and set its DataSet property to the name of your TSQLQuery component.
- Select the TDBGrid component and set its DataSource property to your TDataSource component.
- Select the TSQLTransaction component. Set the following properties:
- Active: True
- Database: The name of your TSQLConnector component



Add Code to Test the Connection
To successfully test the connection, use the following code:
- Double-click on the Main Form to open up the Source Editor.
- Add the following code under the begin keyword and before the end. keyword.
procedure TForm1.FormCreate(Sender: TObject);
begin
// Code for your Security Token
SQLConnector1.Params.Values ['Password'] :=
SQLConnector1.Params.Values ['Password'] + 'your_security_token';
try
SQLConnector1.Open;
ShowMessage('Connection successful!');
except
on E: Exception do
ShowMessage('Error: ' + E.Message);
end;
try
SQLQuery1.Open;
if SQLQuery1.IsEmpty then
ShowMessage('No data found.')
else
ShowMessage('Data loaded successfully.');
except
on E: Exception do
ShowMessage('Error: ' + E.Message);
end;
end;
end.

Compile and Run the Application
Save your project. Go to Run > Compile, then Run, or use the shortcut F9 to execute your application.



Next Steps: Play with the Data
Now that your data is successfully imported into Lazarus, here are some ideas to explore its full potential:
- Enhance Your TDBGrid: Customize your TDBGrid to enable sorting, editing, or highlighting specific rows.
- Visualize Your Data: Use components like TChart to create graphs and charts for intuitive data representation.
- Filter and Search: Use components like TDBFilter or implement custom filtering logic to allow users to quickly focus on relevant data. Add a TEdit component for user input and link it to your filtering functionality.
- Export Your Data: Utilize TSVExport or TFileStream components to save your data in formats like CSV or Excel for sharing or integration into other systems.
- Perform Calculations: Use TFPCustomDataSet or your dataset's built-in features to calculate totals, averages, or other metrics. Display results in a TLabel or add them to your TDBGrid.
- Create Forms and Reports: Design interactive forms using TForm and TDBEdit for user interaction. For reports, integrate components like RLReport or FastReport to generate and print professional-quality reports.
Take your data-driven application to the next level with these enhancements!
Simplify Data Connectivity in Lazarus with CData
Unlock the full potential of live AlloyDB data directly within Lazarus Pascal. Streamline your workflows, enhance productivity, and experience seamless integration like never before.
Start your free trial today and transform the way you connect and work with your data!