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Introducing LLBLGen Pro QuerySpec: a new fluent query API

Posted By: FransBouma     Posted Date: April 10, 2011    Points: 0   Category :ASP.Net

In the past two months I've been busy creating a new query specification API for LLBLGen Pro. Our native query API is modeled after SQL statement fragments (like a 'predicate', a 'relationship', a 'field'), but specifying a query with it can be a little verbose, and above all: the code doesn't look like a query. Especially with complex queries and projections it can sometimes be tedious to grasp what the SQL will look like and what the query is doing. With LLBLGen Pro QuerySpec this changes: a fluent, compact, highly expressive API which allows you to write queries in the structure of the SQL it will produce and with the expressiveness of Linq.

LLBLGen Pro QuerySpec went into beta yesterday, and is a free add-on for LLBLGen Pro v3.0/v3.1 users and available in the customer area. In theory it should work for v2.6 users as well, but we didn't test that. In the next weeks I hope to write more blog posts about QuerySpec and its features.

But first, let's look into why QuerySpec saw the light of day. In 2008 we introduced LLBLGen Pro v2.6 with a full Linq provider: you could formulate queries in Linq which made things much easier than writing queries in our own native query API. In v3.0, released in 2010, we fine-tuned the Linq provider more to mak

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