Prequel was born out of working on a product which contains a large number of database schemas and stored procedures. Every so often, a really basic error would be accidentally committed to the repository - sometimes, the SQL had syntax errors. This wasn't caught until tests were run, which seemed wasteful. So I wanted a tool I could run on plain .sql files and integrate into the build system so that it would catch syntax errors and other errors earlier.
Say you have a file foo.sql which contains:
create procedure sp_foo as
declare @myvar as int
set @mvar = 2
go
You can run prequel like so:
PS C:\> .\Prequel.exe /warn:3 foo.sql
And it will print out
Prequel version 0.1.0.0
Warnings:
c:\temp\foo.sql(1) : WARNING 4 : Procedure sp_foo should not be named with the prefix 'sp_'
c:\temp\foo.sql(3) : WARNING 1 : Variable @mvar used before being declared
c:\temp\foo.sql(1) : WARNING 3 : Procedure sp_foo does not SET NOCOUNT ON
c:\temp\foo.sql(2) : WARNING 2 : Variable @myvar declared but never used
Prequel requires .NET Framework 4.0 and the Microsoft SQL Server 2014 Transact-SQL ScriptDom package, which can be found on http://www.microsoft.com/en-us/download/details.aspx?id=42295. Click Download and choose the SqlDom.msi installer. To install Prequel itself, just unpack the .zip somewhere on your path. Note that even if you want to target an earlier version of SQL, you still want the 2014 ScriptDom package.
The tool works, but is unpolished and has a very small set of cases that it will detect so far. It works only on Windows, and only supports Microsoft SQL Server's T-SQL dialect of SQL.