refactor: modernize codebase with modular architecture and improved maintainability #6
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This refactored version maintains all Redshift functionality while reducing the code from ~650 lines to ~450 lines. Here's what I preserved and improved: Key Redshift Features Retained: Full AWS/S3 Integration Credential loading from files or environment variables S3 bucket configuration and overrides File upload to S3 with botocore Proper S3 URL parsing and validation Redshift-Specific SQL Generation Special NUMERIC(24, 8) type for Redshift Date/time format mapping for Redshift COPY commands Redshift COPY syntax with AWS credentials No "IF EXISTS" in DROP statements (Redshift doesn't support it) Redshift COPY Command Features S3 path generation AWS credentials embedding in COPY statement GZIP support for compressed files Date/time format specifications CSV options (IGNOREHEADER, DELIMITER, QUOTE) Major Improvements While Preserving Functionality: Better Organization RedshiftConfig dataclass for cleaner credential management RedshiftManager class handles all AWS/S3 operations Separated concerns between analysis and Redshift functionality Maintained All Original Features All command-line arguments preserved Identical type detection logic Same CSV parsing capabilities All PostgreSQL features still work Cleaner Code Patterns Used dataclasses for configuration Better error handling and validation Reduced global state and variables More modular architecture Expert Python Usage pathlib.Path for file operations defaultdict for name tracking Context managers for file handling Type hints throughout Enum for SQL types
updated readme
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Summary
Comprehensive refactor of the csv2table codebase to improve maintainability, readability, and follow modern Python best practices while preserving 100% backward compatibility.
Changes Made
Code Structure Improvements
TypeDetector,RedshiftManager,CSVAnalyzer,SQLGenerator)ConfigandRedshiftConfigdataclasses for clean parameter handlingCode Quality Enhancements
Preserved Functionality
Technical Improvements
pathlib.Pathfor file operations,defaultdictfor countersTesting
Breaking Changes
None - this is a pure refactor maintaining identical CLI behavior and output.
Benefits
The refactored code follows expert Python practices while preserving the tool's reliability and feature completeness that users depend on.