Syntax Corrector | Power BI

SQL Procedure Refactoring for Clarity and

This document details the refactoring of a SQL procedure to improve clarity and maintainability. It highlights changes to procedure and variable names, adds comments, and enhances formatting for better readability.

Prompt

SQL

CREATE PROCEDURE GetUserOrders (
@UserId INT
)
AS
BEGIN
    DECLARE @CurrentDate DATE = GETDATE();
    SELECT OrderId, ProductId, Quantity
    FROM Orders
    WHERE UserId = @UserId AND OrderDate < @CurrentDate;
END;

Answer

Code Refactoring for SQL Procedure

Language Identification

The provided code snippet is written in SQL, specifically in the Transact-SQL (T-SQL) dialect used by Microsoft SQL Server.

Original Code

CREATE PROCEDURE GetUserOrders (
@UserId INT
)
AS
BEGIN
    DECLARE @CurrentDate DATE = GETDATE();
    SELECT OrderId, ProductId, Quantity
    FROM Orders
    WHERE UserId = @UserId AND OrderDate < @CurrentDate;
END;

Refactored Code

CREATE PROCEDURE RetrieveUserOrders (
    @UserId INT 
)
AS
BEGIN
    DECLARE @Today DATE = GETDATE(); -- Current date for filtering orders
    SELECT OrderId, ProductId, Quantity
    FROM Orders
    WHERE UserId = @UserId AND OrderDate < @Today; -- Filter criteria based on input
END;

Annotations of Changes

Procedure Name Change:
- Original: GetUserOrders
- Refactored: RetrieveUserOrders
- Justification: The term "Retrieve" conveys a more precise action of fetching data, aligning better with standard naming conventions.
Variable Name Change:
- Original: @CurrentDate
- Refactored: @Today
- Justification: Using @Today makes it clear that the variable represents the current date of execution, thus enhancing clarity.
Comment Revisions:
- Original: No comments present
- Refactored: Comments added to clarify the purpose of the variable and the SELECT query.
- Justification: Adding comments improves code maintainability by providing context for developers reading the code in the future. Clarity in the comments regarding filtering criteria assists in understanding the business logic behind the query.
Space Formatting:
- Added a space within the parentheses of the CREATE PROCEDURE statement.
- Justification: Maintains consistency with formatting practices and enhances readability.

Conclusion

The refactoring maintains the original functionality while enhancing readability, maintainability, and adherence to best practices. Each modification has been justified to ensure alignment with standardized programming conventions.