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• Using Subjects to Deploy Queries Dynamically

  In the previous blog posting, we showed how to construct and deploy query fragments to a StreamInsight server, and how to re-use them later. In today’s posting we’ll integrate this pattern into a method of dynamically composing a new query Read More... Posted Thursday, August 30, 2012 12:13 PM by Roman Schindlauer | 0 Comments Filed under: LINQ

• Taming Hopping Windows

  At first glance, hopping windows seem fairly innocuous and obvious. They organize events into windows with a simple periodic definition: the windows have some duration d (e.g. a window covers 5 second time intervals), an interval or period p (e.g. a new Read More... Posted Tuesday, July 03, 2012 6:03 PM by Roman Schindlauer | 0 Comments Filed under: LINQ, Time

• Changes to the LINQ-to-StreamInsight Dialect

  In previous versions of StreamInsight (1.0 through 2.0), CepStream<> represents temporal streams of many varieties: Streams with ‘open’ inputs (e.g., those defined and composed over CepStream<T>.Create(string streamName) Streams Read More... Posted Thursday, June 28, 2012 11:09 AM by Roman Schindlauer | 0 Comments Filed under: LINQ

• New in V1.2: Default Window Output Policies

  Who knows what window output policies in StreamInsight LINQ are? Anyone? Well, you have been using them whenever you have used a window. Output policies specify the timestamps of the result of the aggregation that happens on the window. Even if you didn’t Read More... Posted Wednesday, August 03, 2011 8:46 AM by Roman Schindlauer | 0 Comments Filed under: LINQ

• New in V1.2: LINQ Macros

  StreamInsight LINQ is powerful and expressive. At the same time, the learning curve for a new user can be steep, because the query operators work on a semantically basic level. This means that complex use cases need to be build bottom up, composing the Read More... Posted Thursday, July 28, 2011 9:54 AM by Roman Schindlauer | 2 Comments Filed under: LINQ

• New in V1.2: Primitive Event Types

  In a previous posting , we introduced nested types as one of the new features in StreamInsight V1.2. The second improvement in the type system represents the other end of the complexity spectrum, namely the ability to use "primitive" event types, without Read More... Posted Monday, July 25, 2011 5:34 PM by Roman Schindlauer | 0 Comments Filed under: LINQ

• New in V1.2: Nested Event Types

  One of the focus areas for us in V1.2 was the LINQ surface of StreamInsight. We have straightened out many of the kinks people complained about in previous versions and have added new features. Too many improvements for a single blog post, so today we’ll Read More... Posted Thursday, July 21, 2011 10:50 AM by Roman Schindlauer | 0 Comments Filed under: LINQ

• Rolling Out 101 Samples

  StreamInsight’s LINQ query and analytics language is powerful and versatile. To ease users and developers over the inevitable initial learning curve, we know that high-quality documentation and a variety of examples are absolutely crucial. While we are Read More... Posted Tuesday, May 10, 2011 4:33 PM by Roman Schindlauer | 0 Comments Filed under: samples, LINQ

• StreamInsight LINQPad Driver

  Joseph Albahari's LINQPad has become an indispensable tool for many of us on the StreamInsight team. It allows you to quickly design, test and visualize results for LINQ queries. We've now developed a dedicated LINQPad driver for StreamInsight with Joe's Read More... Posted Wednesday, November 24, 2010 6:03 PM by Roman Schindlauer | 2 Comments Filed under: LINQ

• Windows in StreamInsight: The Basics

  If you start learning how to write StreamInsight queries, most likely one of the first concepts you come across are windows. In this article, we’d like to shed some light on the usage of windows, hoping to provide a better understanding for the Read More... Posted Tuesday, November 23, 2010 10:05 AM by Roman Schindlauer | 0 Comments Filed under: LINQ