Avro ADO.NET Provider

SQL-based Access to Avro through ADO.NET for your custom .NET applications and SSAS.

The Avro ADO.NET Data Provider enables user to easily connect to Avro data from .NET applications. Rapidly create and deploy powerful .NET applications that integrate with Avro.

Avro

Avro .NET Connectivity Features

SQL access to Apache Avro files and folders
Connect to live Apache Avro data, for real-time data access with the Apache Avro ODBC Driver
Full support for data aggregation and complex JOINs in SQL queries
Secure connectivity through modern cryptography, including TLS 1.2, SHA-256, ECC, etc.
Generate table schema automatically based on existing Apache Avro data or manually for greater control of the content you need
Seamless integration with leading BI, reporting, and ETL tools and with custom applications via the Avro Connector.

Target Service, API

The driver provides SQL access to Apache Avro files. Binary data format support.

Schema, Data Model

Automatically infers schema from Avro files. Supports complex Avro types.

Key Objects

Avro files exposed as tables. Schema evolution support. Nested structure handling.

Operations

Read operations on Avro data. SQL queries with projections and filters.

Authentication

File system access. No additional authentication for local files.

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SSAS Cube

Use Avro from SQL Server Analysis Service (SSAS) multi-dimensional cubes. Keep your analytical data modeling and access to any source including cloud and on-premises.

Custom .NET Application

The Avro ADO.NET Provider allows developers to build applications that connect to Avro using familiar SQL and Entity Framework. Integrate Avro to your mission -critical applications or create easy side-by-side applications.

Low-Code Dev Platforms

You can connect from ADO.NET compliant low-code development tools:

Reporting Tools

You can connect Avro from .NET-based reporting and analytics tools:

Standard ADO.NET Access to Avro

The Avro ADO.NET Provider offers the most natural way to access Avro data from any .NET application. Simply use Avro Data Provider objects to connect and access data just as you would access any traditional database. You will be able to use the Avro Data Provider through Visual Studio Server Explorer, in code through familiar classes, and in data controls like DataGridView, GridView, DataSet, etc.

The CData ADO.NET Provider for Avro hides the complexity of accessing data and provides additional powerful security features, smart caching, batching, socket management, and more.

Working with DataAdapters, DataSets, DataTables, etc.

The Avro Data Provider has the same ADO.NET architecture as the native .NET data providers for SQL Server and OLEDB, including: AvroConnection, AvroCommand, AvroDataAdapter, AvroDataReader, AvroDataSource, AvroParameter, etc. Because of this you can now access Avro data in an easy, familiar way.

For example:

using (AvroConnection conn = new AvroConnection("...")) {
	string select = "SELECT * FROM AvroData";
	AvroCommand cmd = new AvroCommand(select, conn);
	AvroDataAdapter adapter = new AvroDataAdapter(cmd);
	using (adapter) {
		DataTable table = new DataTable();
		adapter.Fill(table);		
		...
	}
}

ADO.NET Provider Performance

With traditional approaches to remote access, performance bottlenecks can spell disaster for applications. Regardless if an application is created for internal use, a commercial project, web, or mobile application, slow performance can rapidly lead to project failure. Accessing data from any remote source has the potential to create these problems. Common issues include:

Network Connections - Slow network connections and latency issues are common in mobile applications.
Service Delays - Delays due to service interruptions, resulting in server hardware or software updates.
Large Data - Intentional or unintentional requests for large amounts of data.
Disconnects - Complete loss of network connectivity.

The CData ADO.NET Provider for Avro solves these issues by supporting powerful smart caching technology that can greatly improve the performance and dramatically reduce application bottlenecks.

Smart Caching

Smart caching is a configurable option that works by storing queried data into a local database. Enabling smart caching creates a persistent local cache database that contains a replica of data retrieved from the remote source. The cache database is small, lightweight, blazing-fast, and it can be shared by multiple connections as persistent storage.

Caching with our ADO.NET Providers is highly configurable, including options for:

Auto Cache - Maintain an automatic local cache of data on all requests. The provider will automatically load data into the cache database each time you execute a SELECT query. Each row returned by the query will be inserted or updated as necessary into the corresponding table in the cache database.
Explicit Cache - Cache only on demand. Developers decide exactly what data gets stored in the cache and when it is updated. Explicit caching provides full control over the cache contents by using explicit execution of CACHE statements.
No Cache - All requests access only live data and no local cache file is created.

This powerful caching functionality increases application performance and allows applications to disconnect and continue limited functioning without writing code for additional local storage and/or data serialization/deserialization.

More information about ADO.NET Provider caching and best caching practices is available in the included help files.

Visual Studio Integration & Server Explorer

Working with the new Avro ADO.NET Provider is easy. As a fully-managed .NET Data Provider, the Avro Data Provider integrates seamlessly with the Visual Studio development environment as well as any .NET application.

As an ADO.NET Data Provider, Avro ADO.NET Provider can be used to access and explore Apache Avro data directly from the Visual Studio Server Explorer.

It's easy. As a standard ADO.NET adapter, developers can connect the Server Explorer to Avro ADO.NET Provider just like connecting to any standard database.

Add a new Data Connection from the Server Explorer and select the Apache Avro Data Source
Configure the basic connection properties to access your Apache Avro account data.

Explore all of the data available! Avro ADO.NET Provider makes it easy to access live Apache Avro data from Visual Studio.

After configuring the connection, explore the feeds, views, and services provided by the Apache Avro Data Source.
These constructs return live Apache Avro data that developers can work with directly from within Visual Studio!

Developer Integration: Databind to Avro

Connecting Web, Desktop, and Mobile .NET applications with Apache Avro is just like working with SQL Server. It is even possible to integrate Avro ADO.NET Provider into applications without writing code.

Developers are free to access the Avro ADO.NET Provider in whatever way they like best. Either visually through the Visual Studio Winforms or Webforms designers, or directly through code.

Developers can connect the Apache Avro Data Source directly to form components by configuring the object's smart tags.
Add a new Data Connection from the Server Explorer and select the Apache Avro Data Source. Then, select the feed, view, or services you would like to connect the object to.

Done! It's just like connecting to SQL Server.

Once the object is bound to the data source, applications can easily interact with Apache Avro data with full read/write (CRUD) support.