feat: Enhance database interaction with connection pooling, transaction support, and query analysis tools

- Introduced connection pooling for PostgreSQL, MySQL, and MSSQL with configurable settings
- Added transaction management features: `begin_transaction`, `commit_transaction`, `rollback_transaction`, and `execute_in_transaction`
- Implemented query analysis tool `explain_query` for execution plan insights
- Added schema comparison tool `compare_schemas` for diffing schemas between connections
- Included pool statistics tool `get_pool_stats` for monitoring connection pool health
- Updated documentation in README and CHANGELOG to reflect new features

Author: srthkdev

CHANGELOG.md

@@ -16,6 +16,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Pre-commit hooks via Husky
 - Vitest test framework
 - Issue and PR templates
+- Connection pooling for PostgreSQL, MySQL, and MSSQL with configurable pool settings
+- Transaction support with `begin_transaction`, `commit_transaction`, `rollback_transaction`, and `execute_in_transaction` tools
+- Query explain tool (`explain_query`) for analyzing query execution plans
+- Schema comparison tool (`compare_schemas`) for diffing schemas between connections
+- Pool statistics tool (`get_pool_stats`) for monitoring connection pool health
 
 ### Changed
 - Upgraded `@modelcontextprotocol/sdk` from 1.9.0 to 1.25.2 (security fix)

README.md

@@ -15,6 +15,10 @@ MCP server that provides AI assistants access to databases through DBeaver conne
 - Uses existing DBeaver connections (no separate config needed)
 - Native query execution for PostgreSQL, MySQL/MariaDB, SQLite, SQL Server
 - Falls back to DBeaver CLI for other database types
+- Connection pooling with configurable pool size and timeouts
+- Transaction support (BEGIN/COMMIT/ROLLBACK)
+- Query execution plan analysis (EXPLAIN)
+- Schema comparison between connections
 - Read-only mode and tool filtering
 - Query validation to block dangerous operations
 - Data export to CSV/JSON
@@ -54,6 +58,10 @@ Add to your Claude Desktop config (`~/Library/Application Support/Claude/claude_
 | `DBEAVER_DEBUG` | Enable debug logging | `false` |
 | `DBEAVER_READ_ONLY` | Disable write operations | `false` |
 | `DBEAVER_DISABLED_TOOLS` | Comma-separated tools to disable | None |
+| `DBEAVER_POOL_MIN` | Minimum connections per pool | `2` |
+| `DBEAVER_POOL_MAX` | Maximum connections per pool | `10` |
+| `DBEAVER_POOL_IDLE_TIMEOUT` | Idle connection timeout (ms) | `30000` |
+| `DBEAVER_POOL_ACQUIRE_TIMEOUT` | Connection acquire timeout (ms) | `10000` |
 
 ### Read-Only Mode
 
@@ -104,6 +112,17 @@ Add to your Claude Desktop config (`~/Library/Application Support/Claude/claude_
 - `alter_table` - Modify tables
 - `drop_table` - Drop tables (requires confirmation)
 
+### Transactions
+- `begin_transaction` - Start a new transaction
+- `execute_in_transaction` - Execute query within a transaction
+- `commit_transaction` - Commit a transaction
+- `rollback_transaction` - Roll back a transaction
+
+### Query Analysis
+- `explain_query` - Analyze query execution plan
+- `compare_schemas` - Compare schemas between two connections
+- `get_pool_stats` - Get connection pool statistics
+
 ### Other
 - `get_database_stats` - Database statistics
 - `append_insight` - Store analysis notes