Why is a Stored Procedure Precompiled in SQL Server? Introduction In SQL Server, Stored Procedures are often described as "precompiled." But what does this mean, and why is it beneficial? This article breaks down the concept of precompilation in stored procedures, how it works, and why it improves performance. What Does "Precompiled" Mean in Stored Procedures? When a stored procedure is created, SQL Server does not execute it immediately. Instead, it analyzes, parses, and optimizes the SQL statements inside the procedure, creating an execution plan. This process is called precompilation . When the stored procedure is later executed, SQL Server reuses the precompiled execution plan rather than interpreting the SQL from scratch. This reduces processing overhead and improves performance . How Precompilation Works Step 1: Parsing and Syntax Checking When you create a stored procedure, SQL Server first parses the SQL statements to check for s...
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