From 39d0c75a992b9ddfd03142d64fc680666b911dac Mon Sep 17 00:00:00 2001 From: Sacha Arbonel Date: Tue, 7 Jan 2025 22:28:36 +0100 Subject: [PATCH] Update README to include completed features and prioritize future improvements for database functionality --- README.md | 247 +++++++++++++++++++++++++++--------------------------- 1 file changed, 122 insertions(+), 125 deletions(-) diff --git a/README.md b/README.md index 76a2a06..fdcaef0 100644 --- a/README.md +++ b/README.md @@ -162,133 +162,130 @@ fn main() { } ``` +## Completed Features + +### Core Database Features +- ✅ In-Memory and On-Disk storage modes +- ✅ Basic SQL statements (CREATE, INSERT, SELECT, UPDATE, DELETE) +- ✅ ALTER TABLE with ADD/DROP/RENAME column support +- ✅ DROP TABLE functionality +- ✅ INNER JOIN support +- ✅ Primary key constraints +- ✅ Basic error handling system + +### Full-Text Search +- ✅ FTS_TEXT data type +- ✅ Inverted index implementation +- ✅ Basic tokenization +- ✅ Memory and disk-based index storage +- ✅ MATCH operator for text search + +### Transaction Support +- ✅ Basic transaction structure +- ✅ Transaction isolation levels (ReadUncommitted, ReadCommitted, RepeatableRead, Serializable) +- ✅ Write-Ahead Logging (WAL) +- ✅ Transaction manager with locking mechanism + +### Indexing +- ✅ B-Tree index implementation +- ✅ CREATE INDEX and DROP INDEX support +- ✅ Index persistence for on-disk storage +- ✅ Basic query optimization with indexes + ## Future Improvements (TODOs) -- [ ] Implement support for more SQL statements: - - [x] ALTER TABLE - - [x] DROP TABLE - - [x] JOIN execution logic - - [ ] JOIN parsing for: - - [ ] LEFT JOIN - - [ ] RIGHT JOIN - - [ ] OUTER JOIN - - [ ] CROSS JOIN - - [ ] FULL JOIN - -- [] Add support for indexing and query optimization: - - [x] Implement CREATE INDEX and DROP INDEX SQL statement parsing - - [x] Add query optimization logic to use indexes when available - - [x] Implement index persistence for on-disk storage mode - - [ ] Add Hash indexes for equality comparisons - - [ ] Add Bitmap indexes for low-cardinality columns - - [ ] Support multi-column indexes - - [ ] Implement covering indexes - - [ ] Add cost-based optimizer - - [ ] Implement statistics collection and maintenance - - [ ] Add query plan generation and visualization - - [ ] Implement join order optimization - - [ ] Add index usage statistics - - [ ] Support index hints in queries - -- [ ] Implement transaction support: - - [x] Basic transaction structure - - [ ] ACID compliance - - [ ] Implement autocommit mode - - [ ] Add SAVEPOINT support - - [ ] Add ROLLBACK TO SAVEPOINT - - [ ] Support transaction isolation levels - - [ ] Implement Write-Ahead Logging (WAL) - -- [ ] Add support for advanced SQL features: - - [ ] Aggregate functions (SUM, COUNT, AVG, MIN, MAX) - - [ ] GROUP BY clauses - - [ ] HAVING clauses - - [ ] ORDER BY clauses - - [ ] LIMIT and OFFSET - - [ ] Window functions - - [ ] Subqueries - - [ ] Common Table Expressions (CTEs) - - [ ] Views - - [ ] Stored procedures - - [ ] User-defined functions - -- [ ] Improve error handling and reporting: - - [ ] Add detailed error messages - - [ ] Implement error codes - - [ ] Add stack traces for debugging - - [ ] Improve error recovery - - [ ] Add warning system - -- [ ] Enhance full-text search: - - [ ] Implement stemming - - [ ] Add tokenization options - - [ ] Support synonyms - - [ ] Add language-specific processing - - [ ] Implement relevance scoring - - [ ] Add phrase searching - - [ ] Support fuzzy matching - -- [ ] Implement security features: - - [ ] User authentication - - [ ] Role-based authorization - - [ ] Row-level security - - [ ] Column-level security - - [ ] Audit logging - - [ ] SSL/TLS support - -- [ ] Add distributed features: - - [ ] Implement replication using raft-rs - - [ ] Add master-slave configuration - - [ ] Support sharding - - [ ] Implement distributed transactions - - [ ] Add consensus protocol - - [ ] Support failover - -- [ ] Improve user interface: - - [ ] Command-line interface - - [ ] Web-based admin interface - - [ ] Query visualization - - [ ] Performance monitoring dashboard - - [ ] Schema visualization - -- [ ] Add comprehensive testing: - - [ ] Unit tests - - [ ] Integration tests - - [ ] Performance benchmarks - - [ ] Stress tests - - [ ] Compatibility tests - - [ ] Security tests - -- [ ] Implement constraints: - - [ ] UNIQUE constraints - - [ ] PRIMARY KEY constraints - - [ ] FOREIGN KEY constraints with ON DELETE/UPDATE actions - - [ ] CHECK constraints - - [ ] NOT NULL constraints - - [ ] DEFAULT values - -- [ ] Add concurrency support: - - [ ] Implement multi-threading - - [ ] Add connection pooling - - [ ] Implement row-level locking - - [ ] Add deadlock detection - - [ ] Support MVCC - -- [ ] Expand data type support: - - [ ] DATE and TIME types - - [ ] DECIMAL/NUMERIC types - - [ ] BOOLEAN type - - [ ] BLOB/BINARY types - - [ ] Array types - - [ ] JSON type - - [ ] User-defined types - -- [ ] Optimize resource management: - - [ ] Implement query result cache - - [ ] Add index page cache - - [ ] Optimize memory usage - - [ ] Add buffer pool management - - [ ] Implement connection pooling +### High Priority + +#### Query Processing +- [ ] Additional JOIN types: + - [ ] LEFT JOIN + - [ ] RIGHT JOIN + - [ ] OUTER JOIN + - [ ] CROSS JOIN + - [ ] FULL JOIN +- [ ] Aggregate functions (SUM, COUNT, AVG, MIN, MAX) +- [ ] GROUP BY and HAVING clauses +- [ ] ORDER BY clauses +- [ ] LIMIT and OFFSET support + +#### Transaction Enhancements +- [ ] Full ACID compliance +- [ ] Autocommit mode +- [ ] SAVEPOINT support +- [ ] Deadlock detection +- [ ] MVCC implementation + +#### Index Improvements +- [ ] Multi-column indexes +- [ ] Hash indexes for equality comparisons +- [ ] Bitmap indexes for low-cardinality columns +- [ ] Cost-based optimizer +- [ ] Query plan visualization + +### Medium Priority + +#### Full-text Search Enhancements +- [ ] Stemming support +- [ ] Advanced tokenization options +- [ ] Relevance scoring +- [ ] Phrase searching +- [ ] Fuzzy matching +- [ ] Synonym support + +#### Constraint System +- [ ] UNIQUE constraints +- [ ] CHECK constraints +- [ ] NOT NULL constraints +- [ ] DEFAULT values +- [ ] Enhanced FOREIGN KEY support with ON DELETE/UPDATE actions + +#### Query Features +- [ ] Subqueries +- [ ] Common Table Expressions (CTEs) +- [ ] Views +- [ ] Stored procedures +- [ ] User-defined functions + +### Lower Priority + +#### Data Types +- [ ] DATE and TIME types +- [ ] DECIMAL/NUMERIC types +- [ ] BOOLEAN type +- [ ] BLOB/BINARY types +- [ ] Array types +- [ ] JSON type +- [ ] User-defined types + +#### Security Features +- [ ] User authentication +- [ ] Role-based authorization +- [ ] Row-level security +- [ ] Column-level security +- [ ] Audit logging +- [ ] SSL/TLS support + +#### Distributed Features +- [ ] Replication using raft-rs +- [ ] Master-slave configuration +- [ ] Sharding support +- [ ] Distributed transactions +- [ ] Failover support + +#### Performance Optimization +- [ ] Query result cache +- [ ] Index page cache +- [ ] Buffer pool management +- [ ] Connection pooling +- [ ] Query plan optimization + +#### Developer Experience +- [ ] Command-line interface +- [ ] Web-based admin interface +- [ ] Query visualization +- [ ] Performance monitoring dashboard +- [ ] Schema visualization +- [ ] Comprehensive documentation ## License