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# Code Quality Report

## Issues Identified

### Syntax Errors
- Line 45: Missing semicolon at the end of the statement.
- Line 120: Unmatched parenthesis in the if condition.

### Logical Issues
- The function `calculateDiscount` does not handle negative input values, which could lead to incorrect discount calculations.
- The loop in `processData` may run indefinitely if the `data` array is not properly initialized.

### Security Vulnerabilities
- SQL injection risk in the `queryDatabase` function due to string concatenation.
- Insufficient input validation in the `userLogin` function.

### Performance Bottlenecks
- The `generateReport` function loads all data into memory, which could cause performance issues with large datasets.
- The `sortData` function uses a simple bubble sort algorithm, which is inefficient for large datasets.

## Recommendations

### Syntax Errors
- Add the missing semicolon on line 45.
- Add the missing parenthesis on line 120.

### Logical Issues
- Add input validation to handle negative values in the `calculateDiscount` function.
- Initialize the `data` array before the loop in the `processData` function.

### Security Vulnerabilities
- Use parameterized queries in the `queryDatabase` function to prevent SQL injection.
- Add input validation in the `userLogin` function to ensure all fields are properly sanitized.

### Performance Bottlenecks
- Implement pagination or streaming to load data in chunks in the `generateReport` function.
- Replace the bubble sort algorithm with a more efficient algorithm like quicksort or mergesort in the `sortData` function.